BioPAX pathway converted from "CBL, GRB2, FYN and PI3K p85 subunit are constitutively associated" in the Reactome database. LEFT-TO-RIGHT CBL, GRB2, FYN and PI3K p85 subunit are constitutively associated This event has been computationally inferred from an event that has been demonstrated in another species.<p>The inference is based on the homology mapping from PANTHER. Briefly, reactions for which all involved PhysicalEntities (in input, output and catalyst) have a mapped orthologue/paralogue (for complexes at least 75% of components must have a mapping) are inferred to the other species. High level events are also inferred for these events to allow for easier navigation.<p><a href='/electronic_inference_compara.html' target = 'NEW'>More details and caveats of the event inference in Reactome.</a> For details on PANTHER see also: <a href='http://www.pantherdb.org/about.jsp' target='NEW'>http://www.pantherdb.org/about.jsp</a> Converted from EntitySet in Reactome FYN-like kinases Reactome DB_ID: 9852271 Fyn FYN_MOUSE Reactome DB_ID: 420333 cytosol GENE ONTOLOGY GO:0005829 UniProt:P39688 Fyn Fyn FUNCTION Non-receptor tyrosine-protein kinase that plays a role in many biological processes including regulation of cell growth and survival, cell adhesion, integrin-mediated signaling, cytoskeletal remodeling, cell motility, immune response and axon guidance. Inactive FYN is phosphorylated on its C-terminal tail within the catalytic domain. Following activation by PKA, the protein subsequently associates with PTK2/FAK1, allowing PTK2/FAK1 phosphorylation, activation and targeting to focal adhesions. Involved in the regulation of cell adhesion and motility through phosphorylation of CTNNB1 (beta-catenin) and CTNND1 (delta-catenin). Regulates cytoskeletal remodeling by phosphorylating several proteins including the actin regulator WAS and the microtubule-associated proteins MAP2 and MAPT. Promotes cell survival by phosphorylating AGAP2/PIKE-A and preventing its apoptotic cleavage. Participates in signal transduction pathways that regulate the integrity of the glomerular slit diaphragm (an essential part of the glomerular filter of the kidney) by phosphorylating several slit diaphragm components including NPHS1, KIRREL1 and TRPC6. Plays a role in neural processes by phosphorylating DPYSL2, a multifunctional adapter protein within the central nervous system, ARHGAP32, a regulator for Rho family GTPases implicated in various neural functions, and SNCA, a small pre-synaptic protein. Participates in the downstream signaling pathways that lead to T-cell differentiation and proliferation following T-cell receptor (TCR) stimulation. Phosphorylates PTK2B/PYK2 in response to T-cell receptor activation. Also participates in negative feedback regulation of TCR signaling through phosphorylation of PAG1, thereby promoting interaction between PAG1 and CSK and recruitment of CSK to lipid rafts. CSK maintains LCK and FYN in an inactive form. Promotes CD28-induced phosphorylation of VAV1. In mast cells, phosphorylates CLNK after activation of immunoglobulin epsilon receptor signaling (PubMed:12681493).ACTIVITY REGULATION Inhibited by phosphorylation of Tyr-531 by leukocyte common antigen and activated by dephosphorylation of this site.SUBUNIT Interacts (via its SH3 domain) with PIK3R1 and PRMT8 (By similarity). Interacts with FYB1, PAG1, and SH2D1A (By similarity). Interacts with CD79A (tyrosine-phosphorylated form); the interaction increases FYN activity (PubMed:8168489). Interacts with TOM1L1 (phosphorylated form) (PubMed:11711534). Interacts with SH2D1A and SLAMF1 (By similarity). Interacts with and phosphorylates ITCH, down-regulating its activity (By similarity). Interacts with FASLG (By similarity). Interacts with RUNX3 (By similarity). Interacts with KIT (By similarity). Interacts with EPHA8; possible downstream effector of EPHA8 in regulation of cell adhesion (By similarity). Interacts with PTK2/FAK1; this interaction leads to PTK2/FAK1 phosphorylation and activation (By similarity). Interacts with CAV1; this interaction couples integrins to the Ras-ERK pathway (By similarity). Interacts (via SH3 domain) with KLHL2 (via N-terminus) (By similarity). Interacts with KDR (tyrosine phosphorylated) (PubMed:16966330). Interacts (via SH2 domain) with CSF1R (tyrosine phosphorylated) (PubMed:7681396, PubMed:9312046). Interacts with UNC119 (By similarity). Interacts (via SH2 domain) with PTPRH (phosphorylated form) (PubMed:20398064). Interacts with PTPRO (phosphorylated form) (PubMed:20398064). Interacts with PTPRB (phosphorylated form) (PubMed:20398064). Interacts with FYB2 (By similarity). Interacts with DSCAM (PubMed:22685302). Interacts with SKAP1 and FYB1; this interaction promotes the phosphorylation of CLNK (PubMed:12681493).TISSUE SPECIFICITY Isoform 1 is highly expressed in the brain, isoform 2 is expressed in cells of hemopoietic lineages, especially T-lymphocytes.PTM Autophosphorylated at Tyr-420 (PubMed:8441403). Phosphorylation on the C-terminal tail at Tyr-531 by CSK maintains the enzyme in an inactive state (PubMed:8441403). PTPRC/CD45 dephosphorylates Tyr-531 leading to activation. Ultraviolet B (UVB) strongly increase phosphorylation at Thr-15 and kinase activity, and promotes translocation from the cytoplasm to the nucleus. Dephosphorylation at Tyr-420 by PTPN2 negatively regulates T-cell receptor signaling (By similarity). Phosphorylated at tyrosine residues, which can be enhanced by NTN1 (PubMed:22685302).PTM Palmitoylated (PubMed:19956733, PubMed:7980442, PubMed:8413237, PubMed:9201723). Palmitoylation at Cys-3 and Cys-6, probably by ZDHHC21, regulates subcellular location (PubMed:7980442, PubMed:8413237, PubMed:9201723, PubMed:19956733).PTM Myristoylation is required prior to palmitoylation.DISRUPTION PHENOTYPE Mice have various neural defects, including defective long term potentiation, impaired spatial memory, hypomyelination, abnormal dendrite orientation and uncoordinated hippocampal structure.SIMILARITY Belongs to the protein kinase superfamily. Tyr protein kinase family. SRC subfamily. Mus musculus NCBI Taxonomy 10090 UniProt P39688 2 EQUAL 537 EQUAL Reactome Database ID Release 82 420333 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=420333 Reactome R-MMU-420333 2 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-420333.2 Reactome http://www.reactome.org HCK P08103 Reactome DB_ID: 9852269 UniProt:P08103 Hck Hck FUNCTION Non-receptor tyrosine-protein kinase found in hematopoietic cells that transmits signals from cell surface receptors and plays an important role in the regulation of innate immune responses, including neutrophil, monocyte, macrophage and mast cell functions, phagocytosis, cell survival and proliferation, cell adhesion and migration. Acts downstream of receptors that bind the Fc region of immunoglobulins, such as FCGR1A and FCGR2A, but also CSF3R, PLAUR, the receptors for IFNG, IL2, IL6 and IL8, and integrins, such as ITGB1 and ITGB2. During the phagocytic process, mediates mobilization of secretory lysosomes, degranulation, and activation of NADPH oxidase to bring about the respiratory burst. Plays a role in the release of inflammatory molecules. Promotes reorganization of the actin cytoskeleton and actin polymerization, formation of podosomes and cell protrusions. Inhibits TP73-mediated transcription activation and TP73-mediated apoptosis. Phosphorylates CBL in response to activation of immunoglobulin gamma Fc region receptors. Phosphorylates ADAM15, BCR, ELMO1, FCGR2A, GAB1, GAB2, RAPGEF1, STAT5B, TP73, VAV1 and WAS (By similarity).ACTIVITY REGULATION Subject to autoinhibition, mediated by intramolecular interactions involving the SH2 and SH3 domains. Kinase activity is also regulated by phosphorylation at regulatory tyrosine residues. Phosphorylation at Tyr-409 is required for optimal activity. Phosphorylation at Tyr-520 inhibits kinase activity. Inhibited by PP1.SUBUNIT Interacts with ADAM15. Interacts with FASLG. Interacts with ARRB1 and ARRB2. Interacts with FCGR1A; the interaction may be indirect. Interacts with IL6ST. Interacts (via SH3 domain) with ELMO1. Interacts (via SH3 domain) with TP73. Interacts with YAP1. Interacts with ABL1 and ITGB1, and thereby recruits ABL1 to activated ITGB1 (By similarity). Interacts (via SH2 domain) with FLT3 (tyrosine phosphorylated). Interacts with CBL. Interacts with VAV1, WAS and RAPGEF1. Interacts (via SH3 domain) with WDCP (By similarity).TISSUE SPECIFICITY Expressed predominantly in cells of the myeloid and B-lymphoid lineages.PTM Phosphorylated on several tyrosine residues. Autophosphorylated. Becomes rapidly phosphorylated upon activation of the immunoglobulin receptors FCGR1A and FCGR2A. Phosphorylation at Tyr-409 increases kinase activity. Phosphorylation at Tyr-520 inhibits kinase activity. Kinase activity is not required for phosphorylation at Tyr-520, suggesting that this site may be a target of other kinases.PTM Ubiquitinated by CBL, leading to its degradation via the proteasome.PTM Isoform 2 palmitoylation at position 2 requires prior myristoylation. Palmitoylation at position 3 is required for caveolar localization of isoform 2.DISRUPTION PHENOTYPE No visible phenotype, but macrophages have impaired phagocytosis. Mice lacking both HCK and FGR are extremely sensitive to infections by L.monocytogenes.SIMILARITY Belongs to the protein kinase superfamily. Tyr protein kinase family. SRC subfamily. UniProt P08103 2 EQUAL 526 EQUAL Reactome Database ID Release 82 9852269 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9852269 Reactome R-MMU-167708 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-167708.1 Lyn Tyrosine-protein kinase Lyn LYN_MOUSE Lyn Reactome DB_ID: 1112642 UniProt:P25911 Lyn Lyn FUNCTION Non-receptor tyrosine-protein kinase that transmits signals from cell surface receptors and plays an important role in the regulation of innate and adaptive immune responses, hematopoiesis, responses to growth factors and cytokines, integrin signaling, but also responses to DNA damage and genotoxic agents. Functions primarily as negative regulator, but can also function as activator, depending on the context. Required for the initiation of the B-cell response, but also for its down-regulation and termination. Plays an important role in the regulation of B-cell differentiation, proliferation, survival and apoptosis, and is important for immune self-tolerance. Acts downstream of several immune receptors, including the B-cell receptor, CD79A, CD79B, CD5, CD19, CD22, FCER1, FCGR2, FCGR1A, TLR2 and TLR4. Plays a role in the inflammatory response to bacterial lipopolysaccharide. Mediates the responses to cytokines and growth factors in hematopoietic progenitors, platelets, erythrocytes, and in mature myeloid cells, such as dendritic cells, neutrophils and eosinophils. Acts downstream of EPOR, KIT, MPL, the chemokine receptor CXCR4, as well as the receptors for IL3, IL5 and CSF2. Plays an important role in integrin signaling. Regulates cell proliferation, survival, differentiation, migration, adhesion, degranulation, and cytokine release. Down-regulates signaling pathways by phosphorylation of immunoreceptor tyrosine-based inhibitory motifs (ITIM), that then serve as binding sites for phosphatases, such as PTPN6/SHP-1, PTPN11/SHP-2 and INPP5D/SHIP-1, that modulate signaling by dephosphorylation of kinases and their substrates. Phosphorylates LIME1 in response to CD22 activation. Phosphorylates BTK, CBL, CD5, CD19, CD72, CD79A, CD79B, CSF2RB, DOK1, HCLS1, LILRB3/PIR-B, MS4A2/FCER1B, SYK and TEC. Promotes phosphorylation of SIRPA, PTPN6/SHP-1, PTPN11/SHP-2 and INPP5D/SHIP-1. Required for rapid phosphorylation of FER in response to FCER1 activation. Mediates KIT phosphorylation. Acts as an effector of EPOR (erythropoietin receptor) in controlling KIT expression and may play a role in erythroid differentiation during the switch between proliferation and maturation. Depending on the context, activates or inhibits several signaling cascades. Regulates phosphatidylinositol 3-kinase activity and AKT1 activation. Regulates activation of the MAP kinase signaling cascade, including activation of MAP2K1/MEK1, MAPK1/ERK2, MAPK3/ERK1, MAPK8/JNK1 and MAPK9/JNK2. Mediates activation of STAT5A and/or STAT5B. Phosphorylates LPXN on 'Tyr-72'. Kinase activity facilitates TLR4-TLR6 heterodimerization and signal initiation. Phosphorylates SCIMP on 'Tyr-96'; this enhances binding of SCIMP to TLR4, promoting the phosphorylation of TLR4, and a selective cytokine response to lipopolysaccharide in macrophages (PubMed:28098138). Phosphorylates CLNK (PubMed:12681493).ACTIVITY REGULATION Subject to autoinhibition, mediated by intramolecular interactions between the SH2 domain and the C-terminal phosphotyrosine. Phosphorylation at Tyr-397 is required for optimal activity. Phosphorylated by CSK at Tyr-508; phosphorylation at Tyr-508 inhibits kinase activity. Kinase activity is modulated by dephosphorylation by PTPRC/CD45. Inhibited by dasatinib, PP2, and SU6656.SUBUNIT Interacts with TEC. Interacts (via SH2 domain) with FLT3 (tyrosine phosphorylated). Interacts with LIME1 and with CD79A upon activation of the B-cell antigen receptor. Interacts with the B-cell receptor complex. Interacts with phosphorylated THEMIS2. Interacts with EPOR. Interacts with MS4A2/FCER1B. Interaction (via the SH2 and SH3 domains) with MUC1 is stimulated by IL7 and the subsequent phosphorylation increases the binding between MUC1 and CTNNB1/beta-catenin. Interacts with ADAM15. Interacts with NDFIP2 and more weakly with NDFIP1. Interacts with FASLG. Interacts with KIT. Interacts with HCLS1. Interacts with FCGR2B. Interacts with FCGR1A; the interaction may be indirect. Interacts with CD19, CD22, CD79A and CD79B. Interacts (via SH3 domain) with CBLC, PPP1R15A and PDE4A. Interacts with TGFB1I1. Interacts (via SH3 domain) with PIK3R1, the regulatory subunit of phosphatidylinositol 3-kinase; this interaction enhances phosphatidylinositol 3-kinase activity. Interacts with CSF2RB, the common subunit of the IL3, IL5 and CSF2 receptors. Interacts with PAG1; identified in a complex with PAG1 and STAT3. Interacts with ABL1. Interacts with PTPN6/SHP-1. Interacts (via SH3 domain) with SCIMP (via proline-rich region) (PubMed:28098138). This interaction facilitates the phosphorylation of SCIMP on 'Tyr-96', which enhances binding of SCIMP to TLR4, and consequently the phosphorylation of TLR4 in response to stimulation by lipopolysaccharide in macrophages (PubMed:28098138). Interacts with LPXN (via LD motif 3) and the interaction is induced upon B-cell antigen receptor (BCR) activation. Interacts (via SH3-domain) with ANKRD54 (via ankyrin repeat region) in an activation-independent status of LYN. Forms a multiprotein complex with ANKRD54 and HCLS1. Interacts (via SH2 and SH3 domains) with UNC119; leading to LYN activation (By similarity). Interacts with CD36. Interacts with LYN (PubMed:22496641). Interacts with SKAP1 and FYB1; this interaction promotes the phosphorylation of CLNK (PubMed:12681493).TISSUE SPECIFICITY Detected in bone marrow-derived monocytes and macrophages (at protein level) (PubMed:28098138, PubMed:2017160). Expressed predominantly in B-lymphoid and myeloid cells (PubMed:2017160).DOMAIN The protein kinase domain plays an important role in its localization in the cell membrane.PTM Ubiquitinated by CBL, leading to its degradation.PTM Phosphorylated on tyrosine residues in response to KIT signaling (By similarity). Autophosphorylated. Phosphorylation at Tyr-397 is required for optimal activity. Phosphorylation at Tyr-508 inhibits kinase activity. Phosphorylated at Tyr-508 by CSK. Dephosphorylated by PTPRC/CD45. Becomes rapidly phosphorylated upon activation of the B-cell receptor and the immunoglobulin receptor FCGR1A.DISRUPTION PHENOTYPE No visible phenotype at birth. B-cell development in the bone marrow proceeds normally, but mice have reduced numbers of peripheral B-cells, with a greater proportion of immature cells and an increased turnover rate. Dendritic cells also have a more immature phenotype. Mice develop severe asthma upon exposure to airborne antigen. Mice display elevated levels of serum IgM. Aging mice display strongly increased levels of myeloid cells, severe extramedullary hematoipoiesis and tend to develop monocyte/macrophage tumors. After about 16 weeks, mice begin to develop splenomegaly and glomerulonephritis, and display autoimmune antibodies. Their B-cells are hypersensitive to stimulation of the B-cell receptor, and display enhanced activation of the MAP kinase signaling pathway. Mice do not display an allergic response upon IgE receptor engagement.SIMILARITY Belongs to the protein kinase superfamily. Tyr protein kinase family. SRC subfamily. UniProt P25911 2 EQUAL 512 EQUAL Reactome Database ID Release 82 1112642 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=1112642 Reactome R-MMU-1112642 2 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-1112642.2 SYK P48025 Reactome DB_ID: 9824234 UniProt:P48025 Syk Syk ptk72 Sykb FUNCTION Non-receptor tyrosine kinase which mediates signal transduction downstream of a variety of transmembrane receptors including classical immunoreceptors like the B-cell receptor (BCR). Regulates several biological processes including innate and adaptive immunity, cell adhesion, osteoclast maturation, platelet activation and vascular development (PubMed:33782605). Assembles into signaling complexes with activated receptors at the plasma membrane via interaction between its SH2 domains and the receptor tyrosine-phosphorylated ITAM domains. The association with the receptor can also be indirect and mediated by adapter proteins containing ITAM or partial hemITAM domains. The phosphorylation of the ITAM domains is generally mediated by SRC subfamily kinases upon engagement of the receptor. More rarely signal transduction via SYK could be ITAM-independent. Direct downstream effectors phosphorylated by SYK include VAV1, PLCG1, PI-3-kinase, LCP2 and BLNK. Initially identified as essential in B-cell receptor (BCR) signaling, it is necessary for the maturation of B-cells most probably at the pro-B to pre-B transition. Activated upon BCR engagement, it phosphorylates and activates BLNK an adapter linking the activated BCR to downstream signaling adapters and effectors. It also phosphorylates and activates PLCG1 and the PKC signaling pathway. It also phosphorylates BTK and regulates its activity in B-cell antigen receptor (BCR)-coupled signaling. In addition to its function downstream of BCR also plays a role in T-cell receptor signaling. Plays also a crucial role in the innate immune response to fungal, bacterial and viral pathogens. It is for instance activated by the membrane lectin CLEC7A. Upon stimulation by fungal proteins, CLEC7A together with SYK activates immune cells inducing the production of ROS. Also activates the inflammasome and NF-kappa-B-mediated transcription of chemokines and cytokines in presence of pathogens. Regulates neutrophil degranulation and phagocytosis through activation of the MAPK signaling cascade. Required for the stimulation of neutrophil phagocytosis by IL15 (By similarity). Also mediates the activation of dendritic cells by cell necrosis stimuli. Also involved in mast cells activation. Involved in interleukin-3/IL3-mediated signaling pathway in basophils (PubMed:19098920). Also functions downstream of receptors mediating cell adhesion. Relays for instance, integrin-mediated neutrophils and macrophages activation and P-selectin receptor/SELPG-mediated recruitment of leukocytes to inflammatory loci. Also plays a role in non-immune processes. It is for instance involved in vascular development where it may regulate blood and lymphatic vascular separation. It is also required for osteoclast development and function. Functions in the activation of platelets by collagen, mediating PLCG2 phosphorylation and activation. May be coupled to the collagen receptor by the ITAM domain-containing FCER1G. Also activated by the membrane lectin CLEC1B that is required for activation of platelets by PDPN/podoplanin. Involved in platelet adhesion being activated by ITGB3 engaged by fibrinogen. Together with CEACAM20, enhances production of the cytokine CXCL8/IL-8 via the NFKB pathway and may thus have a role in the intestinal immune response (PubMed:26195794).ACTIVITY REGULATION Autoinhibited. Intramolecular binding of the interdomains A and B (also called linker region) to parts of the catalytic domain keep the catalytic center in an inactive conformation. The phosphorylation of the interdomains or the binding of the SH2 domains with dually phosphorylated ITAM domains on transmembrane proteins disrupt those intramolecular interactions allowing the kinase domain to adopt an active conformation. The phosphorylation of SYK and of the ITAM domains which is responsible for SYK activation is essentially mediated by SRC subfamily kinases, like LYN, upon transmembrane receptors engagement. May also be negatively regulated by PTPN6 through dephosphorylation (By similarity). Downstream signaling adapters and intermediates like BLNK or RHOH may mediate positive and/or negative feedback regulation. Negatively regulated by CBL and CBLB through ubiquitination and probable degradation. Phosphorylates SH3BP2 which in turn may regulate SYK through LYN (By similarity).SUBUNIT Interacts with LYN; phosphorylates SYK. Interacts with RHOH (phosphorylated); regulates mast cells activation. Interacts with NFAM1 (phosphorylated); probably involved in BCR signaling. Interacts with VAV1 (via SH2 domain); phosphorylates VAV1 upon BCR activation (By similarity). Interacts with GAB2 (phosphorylated); probably involved in IgE Fc receptor signaling. Interacts (via its SH2 domains) with CD79A (via its phosphorylated ITAM domain); the interaction stimulates SYK autophosphorylation and activation. Interacts (via SH2 domains) with FCER1G (via ITAM domain); activates SYK and mediates neutrophils and macrophages integrin-mediated activation. Interaction with FCER1G in basophils triggers IL3-induced IL4 production (PubMed:19098920). Interacts with ITGB2 and FGR; involved in ITGB2 downstream signaling. Interacts with ITGB3; upon activation by ITGB3 promotes platelet adhesion (By similarity). Interacts (via SH2 domains) with TYROBP (via ITAM domain); involved in neutrophils and macrophages integrin-mediated activation. Interacts with MSN and SELPLG; mediates the selectin-dependent activation of SYK by SELPLG (By similarity). Interacts with BLNK (via SH2 domain). Interacts (via the second SH2 domain) with USP25 (via C-terminus); phosphorylates USP25 and regulates USP25 intracellular levels (By similarity). Interacts (via SH2 domains) with CLEC1B (dimer) (By similarity). Interacts with CLEC7A; participates in leukocyte activation in presence of fungal pathogens. Interacts (phosphorylated) with SLA; may regulate SYK through CBL recruitment (By similarity). Interacts with YWHAG; attenuates BCR-induced membrane translocation and activation of SYK (By similarity). Interacts (via SH2 domains) with GCSAM; the interaction increases after B-cell receptor stimulation, resulting in enhanced SYK autophosphorylation and activity (By similarity). Interacts with TNS2; leading to the phosphorylation of SYK (By similarity). Interacts with FLNA (via filamin repeat 5); docks SYK to the plasma membrane (By similarity). Interacts with CEACAM1; lipopolysaccharide activated neutrophils induce phosphorylation of SYK resulting in the formation of a complex including TLR4 and the phosphorylated form of SYK and CEACAM1, which in turn, recruits PTPN6 that dephosphorylates SYK, reducing the production of reactive oxygen species (ROS) and lysosome disruption, leading to a reduction of the inflammasome activity (PubMed:22496641). Interacts (via SH2 domains) with CEACAM20 (phosphorylated form); the interaction further enhances CEACAM20 phosphorylation (PubMed:26195794). Interacts with IL15RA (By similarity).DOMAIN The SH2 domains mediate the interaction of SYK with the phosphorylated ITAM domains of transmembrane proteins. Some proteins like CLEC1B have a partial ITAM domain (also called hemITAM) containing a single YxxL motif. The interaction with SYK requires CLEC1B homodimerization (By similarity).PTM Autophosphorylated. Phosphorylated on tyrosine residues by LYN following receptors engagement. Phosphorylation on Tyr-317 creates a binding site for CBL, an adapter protein that serves as a negative regulator of BCR-stimulated calcium ion signaling. Phosphorylation at Tyr-342 creates a binding site for VAV1 (By similarity). Phosphorylation on Tyr-342 and Tyr-346 enhances the phosphorylation and activation of phospholipase C-gamma and the early phase of calcium ion mobilization via a phosphoinositide 3-kinase-independent pathway (By similarity). Phosphorylated on tyrosine residues in response to IL15 (By similarity). Phosphorylation on Ser-291 is very common, it peaks 5 minutes after BCR stimulation, and creates a binding site for YWHAG (By similarity). Phosphorylation at Tyr-624 creates a binding site for BLNK (By similarity). Dephosphorylated by PTPN6 (By similarity).PTM Ubiquitinated by CBLB after BCR activation; which promotes proteasomal degradation.DISRUPTION PHENOTYPE Embryos display severe systemic hemorrhage and mice are not viable dying perinatally. While T-cells development is not affected, the development of B-cells is impaired most probably at the pro-B to pre-B transition and mice lack mature B-cells.SIMILARITY Belongs to the protein kinase superfamily. Tyr protein kinase family. SYK/ZAP-70 subfamily. UniProt P48025 1 EQUAL 635 EQUAL Reactome Database ID Release 82 9824234 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9824234 Reactome R-MMU-58268 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-58268.1 YES1 Q04736 Reactome DB_ID: 9837151 UniProt:Q04736 UniProt Q04736 2 EQUAL 543 EQUAL Reactome Database ID Release 82 9837151 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9837151 Reactome R-MMU-373640 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-373640.1 Reactome Database ID Release 82 9852271 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9852271 Reactome R-MMU-912625 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-912625.1 Converted from EntitySet in Reactome p85-containing Class 1A PI3Ks Reactome DB_ID: 9851207 PI3K alpha Reactome DB_ID: 9823932 Converted from EntitySet in Reactome PI3K-regulatory subunits Reactome DB_ID: 9823930 Pik3r1 PIK3R1 P26450 Reactome DB_ID: 9820595 UniProt:P26450 Pik3r1 Pik3r1 FUNCTION Binds to activated (phosphorylated) protein-Tyr kinases, through its SH2 domain, and acts as an adapter, mediating the association of the p110 catalytic unit to the plasma membrane. Necessary for the insulin-stimulated increase in glucose uptake and glycogen synthesis in insulin-sensitive tissues. Plays an important role in signaling in response to FGFR1, FGFR2, FGFR3, FGFR4, KITLG/SCF, KIT, PDGFRA and PDGFRB. Likewise, plays a role in ITGB2 signaling (By similarity). Modulates the cellular response to ER stress by promoting nuclear translocation of XBP1 isoform 2 in a ER stress- and/or insulin-dependent manner during metabolic overloading in the liver and hence plays a role in glucose tolerance improvement (PubMed:20348926).SUBUNIT Heterodimer of a regulatory subunit PIK3R1 and a p110 catalytic subunit (PIK3CA, PIK3CB or PIK3CD). Interacts (via SH2 domains) with CCDC88A/GIV (tyrosine-phosphorylated form); the interaction enables recruitment of PIK3R1 to the EGFR receptor, enhancing PI3K activity and cell migration (By similarity). Interacts with XBP1 isoform 2; the interaction is direct and induces translocation of XBP1 isoform 2 into the nucleus in a ER stress- and/or insulin-dependent but PI3K-independent manner (PubMed:20348926). Interacts with PIK3R2; the interaction is dissociated in an insulin-dependent manner (PubMed:20348926). Interacts with phosphorylated LAT, LAX1 and TRAT1 upon TCR activation. The SH2 domains interact with the YTHM motif of phosphorylated INSR in vitro. Also interacts with tyrosine-phosphorylated IGF1R in vitro. Interacts with IRS1 and phosphorylated IRS4. Interacts with NISCH and RUFY3 (By similarity). Interacts with phosphorylated TOM1L1. Interacts with phosphorylated LIME1 upon TCR or BCR activation. Interacts with CBLB. Interacts with CD28 and CD3Z upon T-cell activation. Interacts with SOCS7 and HCST. Interacts with AXL, FASLG, FGR, HCK, KIT and BCR. Interacts with PTK2/FAK1 (By similarity). Interacts with PDGFRB (tyrosine phosphorylated) (By similarity). Interacts with NTRK1 (phosphorylated upon ligand-binding) (By similarity). Interacts (via SH2 domain) with CSF1R (tyrosine phosphorylated) (PubMed:9312046). Interacts with FER. Interacts with FGFR1, FGFR2, FGFR3 and FGFR4 (phosphorylated) (Probable). Interacts with PDGFRA (tyrosine phosphorylated). Interacts with LYN (via SH3 domain); this enhances enzyme activity. Interacts with ERBB4. Interacts (via SH2 domain) with TEK/TIE2 (tyrosine phosphorylated). Interacts with FAM83B; activates the PI3K/AKT signaling cascade (By similarity). Interacts with APPL1 and APPL2 (PubMed:25328665). Interacts with SRC (By similarity). Interacts with ALOX5; this interaction bridges ALOX5 with CD40 after CD40 ligation in B cells and leads to the production of reactive oxygen species (ROS) (By similarity). Interacts with TYK2 (By similarity).DOMAIN The SH3 domain mediates the binding to CBLB.PTM Polyubiquitinated in T-cells by CBLB; which does not promote proteasomal degradation but impairs association with CD28 and CD3Z upon T-cell activation.PTM Phosphorylated. Tyrosine phosphorylated in response to signaling by FGFR1, FGFR2, FGFR3 and FGFR4. Dephosphorylated by PTPRJ. Phosphorylated by PIK3CA at Ser-608; phosphorylation is stimulated by insulin and PDGF. The relevance of phosphorylation by PIK3CA is however unclear. Phosphorylated in response to KIT and KITLG/SCF. Phosphorylated by FGR (By similarity). Phosphorylated by CSF1R. Phosphorylated by ERBB4. Phosphorylated on tyrosine residues by TEK/TIE2.SIMILARITY Belongs to the PI3K p85 subunit family. UniProt P26450 1 EQUAL 724 EQUAL Reactome Database ID Release 82 9820595 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9820595 Reactome R-MMU-74789 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-74789.1 Pik3r2 PIK3R2 O08908 Reactome DB_ID: 9820598 UniProt:O08908 Pik3r2 Pik3r2 FUNCTION Regulatory subunit of phosphoinositide-3-kinase (PI3K), a kinase that phosphorylates PtdIns(4,5)P2 (Phosphatidylinositol 4,5-bisphosphate) to generate phosphatidylinositol 3,4,5-trisphosphate (PIP3). PIP3 plays a key role by recruiting PH domain-containing proteins to the membrane, including AKT1 and PDPK1, activating signaling cascades involved in cell growth, survival, proliferation, motility and morphology. Binds to activated (phosphorylated) protein-tyrosine kinases, through its SH2 domain, and acts as an adapter, mediating the association of the p110 catalytic unit to the plasma membrane. Indirectly regulates autophagy (By similarity). Promotes nuclear translocation of XBP1 isoform 2 in a ER stress- and/or insulin-dependent manner during metabolic overloading in the liver and hence plays a role in glucose tolerance improvement (PubMed:20348926).SUBUNIT Heterodimer of a regulatory subunit PIK3R2 and a p110 catalytic subunit (PIK3CA, PIK3CB or PIK3CD). Interacts with AXL. Interacts with FLT1 (tyrosine-phosphorylated) and FLT4 (tyrosine-phosphorylated) (By similarity). Interacts with FBXL2; PIK3R2 is a substrate of the SCF(FBXL2) complex. Interacts with PTPN13; dephosphorylates PIK3R2 (By similarity). Interacts with NYAP1, NYAP2 and MYO16 (PubMed:21946561). Interacts with XBP1 isoform 2; the interaction is direct and induces translocation of XBP1 isoform 2 into the nucleus in a ER stress- and/or insulin-dependent but PI3K-independent manner (PubMed:20348926). Interacts with PIK3R1; the interaction is dissociated in an insulin-dependent manner (PubMed:20348926). Interacts with SRC (By similarity).DOMAIN The SH2 2 domain is required for interaction with FBXL2 and PTPN13.PTM Phosphorylated in response to signaling from activated receptor-type protein kinases. Dephosphorylated by PTPRJ. Dephosphorylated at Tyr-649 by PTPN13. Phosphorylation of Tyr-649 impairs while its dephosphorylation promotes interaction with FBXL2 and SCF(FBXL2)-mediated polyubiquitination.PTM Ubiquitinated. Polyubiquitination by the SCF(FBXL2) complex probably promotes proteasomal degradation of PIK3R2.SIMILARITY Belongs to the PI3K p85 subunit family. UniProt O08908 1 EQUAL 728 EQUAL Reactome Database ID Release 82 9820598 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9820598 Reactome R-MMU-74791 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-74791.1 Pik3r3 PIK3R3 Q64143 Reactome DB_ID: 9823928 UniProt:Q64143 Pik3r3 Pik3r3 FUNCTION Binds to activated (phosphorylated) protein-tyrosine kinases through its SH2 domain and regulates their kinase activity. During insulin stimulation, it also binds to IRS-1.SUBUNIT Heterodimer of a regulatory subunit PIK3R3 and a p110 catalytic subunit (PIK3CA, PIK3CB or PIK3CD). Interacts with AXL (By similarity).TISSUE SPECIFICITY Highest levels in brain and testis. Lower levels in adipose tissue, kidney, heart, lung and skeletal muscle. Barely detectable in liver and spleen.SIMILARITY Belongs to the PI3K p85 subunit family. UniProt Q64143 1 EQUAL 461 EQUAL Reactome Database ID Release 82 9823928 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9823928 Reactome R-MMU-205223 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-205223.1 Reactome Database ID Release 82 9823930 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9823930 Reactome R-MMU-391342 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-391342.1 1 Pik3ca Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform PK3CA_MOUSE Reactome DB_ID: 9027214 UniProt:P42337 Pik3ca Pik3ca FUNCTION Phosphoinositide-3-kinase (PI3K) phosphorylates phosphatidylinositol (PI) and its phosphorylated derivatives at position 3 of the inositol ring to produce 3-phosphoinositides. Uses ATP and PtdIns(4,5)P2 (phosphatidylinositol 4,5-bisphosphate) to generate phosphatidylinositol 3,4,5-trisphosphate (PIP3). PIP3 plays a key role by recruiting PH domain-containing proteins to the membrane, including AKT1 and PDPK1, activating signaling cascades involved in cell growth, survival, proliferation, motility and morphology. Participates in cellular signaling in response to various growth factors. Involved in the activation of AKT1 upon stimulation by receptor tyrosine kinases ligands such as EGF, insulin, IGF1, VEGFA and PDGF. Involved in signaling via insulin-receptor substrate (IRS) proteins. Essential in endothelial cell migration during vascular development through VEGFA signaling, possibly by regulating RhoA activity. Required for lymphatic vasculature development, possibly by binding to RAS and by activation by EGF and FGF2, but not by PDGF. Regulates invadopodia formation through the PDPK1-AKT1 pathway. Participates in cardiomyogenesis in embryonic stem cells through a AKT1 pathway. Participates in vasculogenesis in embryonic stem cells through PDK1 and protein kinase C pathway. Also has serine-protein kinase activity: phosphorylates PIK3R1 (p85alpha regulatory subunit), EIF4EBP1 and HRAS. Plays a role in the positive regulation of phagocytosis and pinocytosis (PubMed:19604150).PATHWAY Phospholipid metabolism; phosphatidylinositol phosphate biosynthesis.SUBUNIT Heterodimer of a catalytic subunit PIK3CA and a p85 regulatory subunit (PIK3R1, PIK3R2 or PIK3R3) (PubMed:8139567). Interacts with IRS1 in nuclear extracts (PubMed:15197263). Interacts with RUFY3. Interacts with RASD2. Interacts with APPL1 (By similarity). Interacts with HRAS and KRAS (PubMed:17540175). Interaction with HRAS/KRAS is required for PI3K pathway signaling and cell proliferation stimulated by EGF and FGF2 (PubMed:17540175). Interacts with FAM83B; activates the PI3K/AKT signaling cascade (By similarity).DOMAIN The PI3K-ABD domain and the PI3K-RBD domain interact with the PI3K/PI4K kinase domain. The C2 PI3K-type domain may facilitate the recruitment to the plasma membrane. The inhibitory interactions with PIK3R1 are mediated by the PI3K-ABD domain and the C2 PI3K-type domain with the iSH2 (inter-SH2) region of PIK3R1, and the C2 PI3K-type domain, the PI3K helical domain, and the PI3K/PI4K kinase domain with the nSH2 (N-terminal SH2) region of PIK3R1.DISRUPTION PHENOTYPE Lethal. Embryonic fibroblasts cells are resistant to oncogenic transformation induced by oncogenic receptor tyrosine kinases (RTKs), are unable to differentiate into adipocytes and deficient in cellular signaling in response to various growth factors. Defective responsiveness to insulin led to reduced somatic growth, hyperinsulinemia, glucose intolerance, hyperphagia and increased adiposity.SIMILARITY Belongs to the PI3/PI4-kinase family. UniProt P42337 1 EQUAL 1068 EQUAL Reactome Database ID Release 82 9027214 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9027214 Reactome R-MMU-9027214 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-9027214.1 1 Reactome Database ID Release 82 9823932 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9823932 Reactome R-MMU-198379 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-198379.1 PI3K beta Reactome DB_ID: 9848187 1 Pik3cb PIK3CB Q8BTI9 Reactome DB_ID: 9820604 UniProt:Q8BTI9 Pik3cb Pik3cb FUNCTION Phosphoinositide-3-kinase (PI3K) phosphorylates phosphatidylinositol (PI) derivatives at position 3 of the inositol ring to produce 3-phosphoinositides. Uses ATP and PtdIns(4,5)P2 (phosphatidylinositol 4,5-bisphosphate) to generate phosphatidylinositol 3,4,5-trisphosphate (PIP3) (By similarity). PIP3 plays a key role by recruiting PH domain-containing proteins to the membrane, including AKT1 and PDPK1, activating signaling cascades involved in cell growth, survival, proliferation, motility and morphology. Involved in the activation of AKT1 upon stimulation by G-protein coupled receptors (GPCRs) ligands such as CXCL12, sphingosine 1-phosphate, and lysophosphatidic acid. May also act downstream receptor tyrosine kinases. Required in different signaling pathways for stable platelet adhesion and aggregation. Plays a role in platelet activation signaling triggered by GPCRs, alpha-IIb/beta-3 integrins (ITGA2B/ ITGB3) and ITAM (immunoreceptor tyrosine-based activation motif)-bearing receptors such as GP6. Regulates the strength of adhesion of ITGA2B/ ITGB3 activated receptors necessary for the cellular transmission of contractile forces. Required for platelet aggregation induced by F2 (thrombin) and thromboxane A2 (TXA2). Has a role in cell survival. May have a role in cell migration. Involved in the early stage of autophagosome formation. Modulates the intracellular level of PtdIns3P (phosphatidylinositol 3-phosphate) and activates PIK3C3 kinase activity. May act as a scaffold, independently of its lipid kinase activity to positively regulate autophagy. May have a role in insulin signaling as scaffolding protein in which the lipid kinase activity is not required. May have a kinase-independent function in regulating cell proliferation and in clathrin-mediated endocytosis. Mediator of oncogenic signal in cell lines lacking PTEN. The lipid kinase activity is necessary for its role in oncogenic transformation. Required for the growth of ERBB2 and RAS driven tumors. Has also a protein kinase activity showing autophosphorylation.PATHWAY Phospholipid metabolism; phosphatidylinositol phosphate biosynthesis.SUBUNIT Heterodimer of a catalytic subunit PIK3CB and a p85 regulatory subunit (PIK3R1, PIK3R2 or PIK3R3). Interaction with PIK3R2 is required for nuclear localization and nuclear export (By similarity). Part of a complex with PIK3R1 and PTEN (By similarity). Binding to PTEN may antagonize the lipid kinase activity under normal growth conditions (By similarity). Part of a complex involved in autophagosome formation composed of PIK3C3 and PIK3R4. Interacts with BECN1, ATG14 and RAB5A.DOMAIN The inhibitory interactions with PIK3R1 are mediated by the PI3K-ABD domain and the C2 PI3K-type domain with the iSH2 (inter-SH2) region of PIK3R1; the C2 PI3K-type domain, the PI3K helical domain, and the PI3K/PI4K kinase domain with the nSH2 (N-terminal SH2) region of PIK3R1; and the PI3K/PI4K kinase domain with the cSH2 (C-terminal SH2) region of PIK3R1. The inhibitory interaction between the PI3K-ABD domain and the C2 PI3K-type domain with the iSH2 (inter-SH2) region of PIK3R1 is weak. The nuclear localization signal (NLS) is required for its function in cell survival (By similarity).PTM Phosphorylation at Ser-1064 down-regulates lipid kinase activity.PTM Autophosphorylation at Ser-1064 negatively regulates the phosphatidylinositol-4,5-bisphosphate 3-kinase activity.DISRUPTION PHENOTYPE Mice have defects in autophagosome formation. Have normal bleeding time but are resistant to thrombosis after arterial injury. Mice fail to induce tumors in a model of prostate tumor formation induced by Pten loss.SIMILARITY Belongs to the PI3/PI4-kinase family. UniProt Q8BTI9 1 EQUAL 1070 EQUAL Reactome Database ID Release 82 9820604 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9820604 Reactome R-MMU-74788 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-74788.1 1 Reactome Database ID Release 82 9848187 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9848187 Reactome R-MMU-437110 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-437110.1 PI3K delta Reactome DB_ID: 9851205 1 Pik3cd PIK3CD O35904 Reactome DB_ID: 9851203 plasma membrane GENE ONTOLOGY GO:0005886 UniProt:O35904 Pik3cd Pik3cd FUNCTION Phosphoinositide-3-kinase (PI3K) phosphorylates phosphatidylinositol (PI) and its phosphorylated derivatives at position 3 of the inositol ring to produce 3-phosphoinositides. Uses ATP and PtdIns(4,5)P2 (phosphatidylinositol 4,5-bisphosphate) to generate phosphatidylinositol 3,4,5-trisphosphate (PIP3) (PubMed:9235916). PIP3 plays a key role by recruiting PH domain-containing proteins to the membrane, including AKT1 and PDPK1, activating signaling cascades involved in cell growth, survival, proliferation, motility and morphology. Mediates immune responses. Plays a role in B-cell development, proliferation, migration, and function. Required for B-cell receptor (BCR) signaling. Mediates B-cell proliferation response to anti-IgM, anti-CD40 and IL4 stimulation. Promotes cytokine production in response to TLR4 and TLR9. Required for antibody class switch mediated by TLR9. Involved in the antigen presentation function of B-cells. Involved in B-cell chemotaxis in response to CXCL13 and sphingosine 1-phosphate (S1P). Required for proliferation, signaling and cytokine production of naive, effector and memory T-cells. Required for T-cell receptor (TCR) signaling. Mediates TCR signaling events at the immune synapse. Activation by TCR leads to antigen-dependent memory T-cell migration and retention to antigenic tissues. Together with PIK3CG participates in T-cell development. Contributes to T-helper cell expansion and differentiation. Required for T-cell migration mediated by homing receptors SELL/CD62L, CCR7 and S1PR1 and antigen dependent recruitment of T-cells. Together with PIK3CG is involved in natural killer (NK) cell development and migration towards the sites of inflammation. Participates in NK cell receptor activation. Plays a role in NK cell maturation and cytokine production. Together with PIK3CG is involved in neutrophil chemotaxis and extravasation. Together with PIK3CG participates in neutrophil respiratory burst. Plays important roles in mast-cell development and mast cell mediated allergic response. Involved in stem cell factor (SCF)-mediated proliferation, adhesion and migration. Required for allergen-IgE-induced degranulation and cytokine release. The lipid kinase activity is required for its biological function.ACTIVITY REGULATION Activated by growth factors and cytokine receptors through a tyrosine-kinase-dependent mechanism. Activated by RAS. IC87114 inhibits lipid kinase activity and is selective in cells at doses up to 5-10 uM. Among other effects, IC87114 reduces allergic responses, prevents the recruitment of antigen-specific T cells into target tissue, and affects natural killer cell chemotaxis.PATHWAY Phospholipid metabolism; phosphatidylinositol phosphate biosynthesis.SUBUNIT Heterodimer of a catalytic subunit PIK3CD and a p85 regulatory subunit (PIK3R1, PIK3R2 or PIK3R3). Interacts with ERAS and HRAS.TISSUE SPECIFICITY Abundantly expressed in adult mouse spleen as well as in testis (PubMed:9235916). Isoform 1 is expressed in spleen and lung (at protein level). Isoform 1 is expressed predominantly in leukocytes.PTM Autophosphorylation on Ser-1038 results in the almost complete inactivation of the lipid kinase activity.DISRUPTION PHENOTYPE Null mutants are viable and fertile but display defective adaptive and innate immune responses due to signaling defects in multiple cell types including B-, T- and mast and natural killer cells.SIMILARITY Belongs to the PI3/PI4-kinase family. UniProt O35904 1 EQUAL 1044 EQUAL Reactome Database ID Release 82 9851203 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9851203 Reactome R-MMU-392274 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-392274.1 1 Reactome Database ID Release 82 9851205 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9851205 Reactome R-MMU-508241 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-508241.1 Reactome Database ID Release 82 9851207 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9851207 Reactome R-MMU-508248 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-508248.1 Grb2-1 Growth factor receptor-bound protein 2 GRB2_MOUSE Reactome DB_ID: 9029108 UniProt:Q60631-1 Grb2 Grb2 FUNCTION Adapter protein that provides a critical link between cell surface growth factor receptors and the Ras signaling pathway.SUBUNIT Associates (via SH2 domain) with activated EGF and PDGF receptors (tyrosine phosphorylated) (By similarity). Interacts with PDGFRA (tyrosine phosphorylated); the interaction may be indirect (PubMed:8943348). Interacts with IRS4 (when Tyr-phosphorylated) (PubMed:11113178). Also associates to other cellular Tyr-phosphorylated proteins such as SIT1, IRS1, SHC and LNK; probably via the concerted action of both its SH2 and SH3 domains (By similarity). It also seems to interact with RAS in the signaling pathway leading to DNA synthesis. Interacts with SOS1 (By similarity). Forms a complex with MUC1 and SOS1, through interaction of the SH3 domains with SOS1 and the SH2 domain with phosphorylated MUC1 (By similarity). Interacts with phosphorylated MET (By similarity). Interacts with phosphorylated TOM1L1 (PubMed:11711534). Interacts with the phosphorylated C-terminus of SH2B2 (By similarity). Interacts with phosphorylated SIT1, LAX1, LAT, LAT2 and LIME1 upon TCR and/or BCR activation (By similarity) (PubMed:16249387, PubMed:14610044, PubMed:15477350, PubMed:15477348, PubMed:22561606). Interacts with NISCH, PTPNS1 and REPS2 (By similarity). Interacts with syntrophin SNTA1 (PubMed:11551227). Interacts (via SH3 domains) with REPS1 (PubMed:9395447). Interacts (via SH3 domains) with PIK3C2B (By similarity). Interacts with CBL and CBLB (By similarity). Interacts with AJUBA and CLNK (PubMed:10330178, PubMed:11463797). Interacts (via SH2 domain) with TEK/TIE2 (tyrosine phosphorylated) (PubMed:10521483). Interacts with SHB, INPP5D/SHIP1, SKAP1 and SKAP2 (By similarity). Interacts with PTPN11 (PubMed:8943348). Interacts with PRNP (PubMed:11571277). Interacts with RALGPS1 (By similarity). Interacts also with HCST (PubMed:16582911). Interacts with KDR (PubMed:16966330). Interacts with FLT1 (tyrosine-phosphorylated) (PubMed:9722576). Interacts with GAPT and PTPRE (By similarity). Interacts (via SH2 domain) with KIF26A (By similarity). Interacts (via SH3 2) with GAB2 (PubMed:10068651). Interacts with ADAM15 (By similarity). Interacts with THEMIS2 (PubMed:20644716). Interacts (via SH2 domain) with AXL (phosphorylated) (By similarity). Interacts (via SH2 domain) with KIT (phosphorylated) (PubMed:10377264). Interacts with PTPRJ and BCR (By similarity). Interacts with PTPN23 (By similarity). Interacts with FLT4 (tyrosine phosphorylated) (By similarity). Interacts with EPHB1 and SHC1; activates the MAPK/ERK cascade to regulate cell migration (PubMed:12925710). Part of a complex including TNK2, GRB2 and one receptor tyrosine kinase (RTK) such as AXL and PDGFRL, in which GRB2 promotes RTK recruitment by TNK2 (By similarity). Interacts (via SH2 domain) with CSF1R (tyrosine phosphorylated) (PubMed:9312046). Interacts with ERBB4 (By similarity). Interacts with NTRK1 (phosphorylated upon ligand-binding) (By similarity). Interacts with PTK2/FAK1 (tyrosine phosphorylated) (PubMed:7997267). Interacts with PTK2B/PYK2 (tyrosine phosphorylated) (By similarity). Interacts (via SH2-domain) with SCIMP; this interaction is dependent on phosphorylation of SCIMP 'Tyr-58' (PubMed:21930792, PubMed:28098138, PubMed:28290451). Interacts (via SH3 domains) with GAREM1 (via proline-rich domain and tyrosine phosphorylated); the interaction occurs upon EGF stimulation (By similarity). Interacts with DAB2 (PubMed:9569023). Interacts with TESPA1 (By similarity). Interacts with THEMIS (PubMed:19597498, PubMed:19597497, PubMed:19805304, PubMed:22561606). Interacts with PLCG1, LAT and THEMIS upon TCR activation in thymocytes; the association is weaker in the absence of TESPA1 (PubMed:22561606). Interacts with CD28 (By similarity). Interacts with RAB13; may recruit RAB13 to the leading edge of migrating endothelial cells where it can activate RHOA (PubMed:21543326). Interacts with ASAP3 (phosphorylated form) (By similarity). Interacts (via SH2 domain) with PTPRH (phosphorylated form) (PubMed:20398064). Interacts with PTPRO (phosphorylated form) (PubMed:20398064). Interacts with PTPRB (phosphorylated form) (PubMed:20398064). Interacts (via SH3 domain 2) with PRR14 (via proline-rich region) (By similarity). Interacts with DENND2B (By similarity). Interacts with SPRY2 (By similarity). Interacts with LRRC8A (PubMed:32930093).TISSUE SPECIFICITY Expressed in macrophages.DOMAIN The SH3 domains mediate interaction with RALGPS1 and SHB.SIMILARITY Belongs to the GRB2/sem-5/DRK family. UniProt Isoform Q60631-1 1 EQUAL 217 EQUAL Reactome Database ID Release 82 9029108 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9029108 Reactome R-MMU-9029108 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-9029108.1 CBL P22682 Reactome DB_ID: 9830853 UniProt:P22682 UniProt P22682 1 EQUAL 906 EQUAL Reactome Database ID Release 82 9830853 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9830853 Reactome R-MMU-112199 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-112199.1 FYN-like kinases:CBL:GRB2:p85-containing Class 1A PI3Ks Reactome DB_ID: 9852273 1 1 1 1 Reactome Database ID Release 82 9852273 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9852273 Reactome R-MMU-912623 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-912623.1 Reactome Database ID Release 82 9852275 Database identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser?DB=gk_current&ID=9852275 Reactome R-MMU-879917 1 Reactome stable identifier. Use this URL to connect to the web page of this instance in Reactome: http://www.reactome.org/cgi-bin/eventbrowser_st_id?ST_ID=R-MMU-879917.1 Cbl is constitutively associated with Grb2 in resting hematopoietic cells (Anderson et al. 1997, Odai et al. 1995, Park et al. 1998, Panchamoorthy et al. 1996). Both the SH2 and SH3 domains of Grb2 are involved. Cbl has 2 distinct C-terminal domains, proximal and distal. The proximal domain binds Grb2 in resting and stimulated cells, and in stimulated cells also binds Shc. The distal domain can bind the adaptor protein CRKL.<br><br> Tyrosine phosphorylation of Cbl in response to IL-3 releases the SH3 domain of Grb2 which then is free to bind other molecules (Park et al. 1998). <br>Cbl also associates with Fyn (Anderson et al. 1997) and the related kinases Hck and Lyn (Hunter et al. 1999). Binding studies indicate that this binding is independent of the phosphorylation state of Cbl; The association of Fyn with Cbl has been described as constitutive (Hunter et al. 1999).<br><br> Cbl further associates with the p85 subunit of PI3K (Hartley et al. 1995, Anderson et al. 1997, Hunter et al. 1997), this is also described as constitutive and is mediated by the SH3 domain of p85 (Hunter et al. 1997). 9890970 Pubmed 1999 Fyn associates with Cbl and phosphorylates tyrosine 731 in Cbl, a binding site for phosphatidylinositol 3-kinase Hunter, S Burton, EA Wu, SC Anderson, SM J Biol Chem 274:2097-106 7629144 Pubmed 1995 Specific association of the beta isoform of the p85 subunit of phosphatidylinositol-3 kinase with the proto-oncogene c-cbl Hartley, D Meisner, H Corvera, S J Biol Chem 270:18260-3 9259313 Pubmed 1997 Phosphorylation of cbl after stimulation of Nb2 cells with prolactin and its association with phosphatidylinositol 3-kinase Hunter, S Koch, BL Anderson, SM Mol Endocrinol 11:1213-22 9590251 Pubmed 1998 CBL-GRB2 interaction in myeloid immunoreceptor tyrosine activation motif signaling Park, RK Kyono, WT Liu, Y Durden, DL J Immunol 160:5018-27 7537740 Pubmed 1995 The proto-oncogene product c-Cbl becomes tyrosine phosphorylated by stimulation with GM-CSF or Epo and constitutively binds to the SH3 domain of Grb2/Ash in human hematopoietic cells Odai, H Sasaki, K Iwamatsu, A Hanazono, Y Tanaka, T Mitani, K Yazaki, Y Hirai, H J Biol Chem 270:10800-5 8995358 Pubmed 1997 Phosphorylation of Cbl following stimulation with interleukin-3 and its association with Grb2, Fyn, and phosphatidylinositol 3-kinase Anderson, SM Burton, EA Koch, BL J Biol Chem 272:739-45 8621719 Pubmed 1996 p120cbl is a major substrate of tyrosine phosphorylation upon B cell antigen receptor stimulation and interacts in vivo with Fyn and Syk tyrosine kinases, Grb2 and Shc adaptors, and the p85 subunit of phosphatidylinositol 3-kinase Panchamoorthy, G Fukazawa, T Miyake, S Soltoff, S Reedquist, K Druker, B Shoelson, S Cantley, Lewis C Band, H J Biol Chem 271:3187-94 inferred from electronic annotation EVIDENCE CODE ECO:0000203