Search results for INPP5E

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Protein (3 results from a total of 3)

Identifier: R-HSA-1604585
Species: Homo sapiens
Compartment: cytosol
Primary external reference: UniProt: INPP5E: Q9NRR6
Identifier: R-HSA-5624872
Species: Homo sapiens
Compartment: cilium
Primary external reference: UniProt: INPP5E: Q9NRR6
Identifier: R-HSA-1299450
Species: Homo sapiens
Compartment: mitochondrial inner membrane
Primary external reference: UniProt: PMPCA: Q10713

Reaction (5 results from a total of 5)

Identifier: R-HSA-5624956
Species: Homo sapiens
Compartment: cytosol
The inositol polyphosphate phosphatase INPP5E is a ciliary localized peripheral membrane protein with a CaaX prenylation motif in its C-terminus (Jacoby et al, 2009; Bielas et al, 2009; Humbert et al, 2012). This motif is downstream of the ciliary targeting sequence and prenylation is not required for the ciliary localization of INPP5E. The CaaX motif is required for the interaction between INPP5E and the phosphodiesterase PDE6D, and PDE6D is required for the ciliary localization of full length INPP5E but not a truncated solubilized form. These data suggest that PDE6D may play a role in extracting prenylated INPP5E from a donor membrane prior to ciliary targeting (Humbert et al, 2012).
Identifier: R-HSA-5624954
Species: Homo sapiens
Compartment: cilium
INPP5E is a ciliary peripheral membrane protein that is associated with the ciliopathy Joubert's Syndrome (Bielas et al, 2009; Jacoby et al, 2009). Ciliary localization of the full-length protein depends on a targeting sequence and interactions with PDE6D and ARL13B, although the detailed mechanism remains unresolved (Humbert et al, 2012).
Identifier: R-HSA-5624953
Species: Homo sapiens
Compartment: cilium
The small GTPase ARL13B is required for the ciliary localization of INPP5E. ARL13B binds directly to INPP5E and is thought to displace PDE6D from the complex (Humbert et al, 2012).
Identifier: R-HSA-1675824
Species: Homo sapiens
Compartment: Golgi membrane, cytosol
At the Golgi membrane, phosphatidylinositol 4-phosphate (PI4P) inositol polyphosphate 5-phosphatase OCRL-1 (OCRL) (Choudhury et al. 2009, Suchy et al. 1995, Zhang et al. 1995) and 72 kDa inositol polyphosphate 5-phosphatase (INPP5E) (Bilas et al. 2009) dephosphorylate phosphatidylinositol 4,5-bisphosphate (PI(4,5)P2) to form phosphatidylinositol 4-phosphate (PI4P). INPP5E is located in the Golgi membrane, mediated by its N-terminal proline-rich domain (Kong et al. 2000).
Identifier: R-HSA-5638012
Species: Homo sapiens
Compartment: cilium
ARL13B promotes the ciliary localization of INPP5E by interacting with it directly and displacing PDE6D from the complex (Humbert et al, 2012).

Pathway (2 results from a total of 2)

Identifier: R-HSA-5624958
Species: Homo sapiens
ARL13B is a ciliary-localized small GTPase with an atypical C-terminus containing a coiled coil domain and a proline rich domain (PRD) (Hori et al, 2008). Mutations in ARL13B are associated with the development of the ciliopathy Joubert's Syndrome (Cantagrel et al, 2008; Parisi et al, 2009). Studies in C. elegans and vertebrates suggest that ARL13B may play a role in stabilizing the interaction between the IFT A and B complexes and the kinesin-2 motors during anterograde traffic in the cilium (Cevik et al, 2010; Li et al, 2010; Cevik et al, 2013; reviewed in Li et al, 2012; Zhang et al, 2013). Recent work has shown an additional role for ARL13B in trafficking the inositol polyphosphate-5-phosphatase E (INPP5E) to the cilium through a network that also involves the phosphodiesterase PDE6D and the centriolar protein CEP164 (Humbert et al, 2012; Thomas et al, 2014; reviewed in Zhang et al, 2013). Mutations in INPP5E are also associated with the development of Joubert syndrome and other ciliopathies (Bielas et al, 2009; Jacoby et al, 2009; reviewed in Conduit et al, 2012).
Identifier: R-HSA-5620920
Species: Homo sapiens
Proteomic studies suggest that the cilium is home to approximately a thousand proteins, and has a unique protein and lipid make up relative to the bulk cytoplasm and plasma membrane (Pazour et al, 2005; Ishikawa et al, 2012; Ostrowoski et al, 2002; reviewed in Emmer et al, 2010; Rohatgi and Snell, 2010). In addition, the cilium is a dynamic structure, and the axoneme is continually being remodeled by addition and removal of tubulin at the distal tip (Marshall and Rosenbaum, 2001; Stephens, 1997; Song et al, 2001). As a result, the function and structure of this organelle relies on the directed trafficking of protein and vesicles to the cilium. Small GTPases of the RAS, RAB, ARF and ARL families are involved in cytoskeletal organization and membrane traffic and are required to regulate the traffic from the Golgi and the trans-Golgi network to the cilium (reviewed in Deretic, 2013; Li et al, 2012). ARF4 is a Golgi-resident GTPase that acts in conjunction with a ciliary-targeting complex consisting of the ARF-GAP ASAP1, RAB11A, the RAB11 effector FIP3 and the RAB8A guanine nucleotide exchange factor RAB3IP/RABIN8 to target cargo bearing a putative C-terminal VxPx targeting motif to the cilium. A well-studied example of this system involves the trafficking of rhodopsin to the retinal rod photoreceptors, a specialized form of the cilium (reviewed in Deretic, 2013). ARL3, ARL13B and ARL6 are all small ARF-like GTPases with assorted roles in ciliary trafficking and maintenance. Studies in C. elegans suggest that ARL3 and ARL13B have opposing roles in maintaining the stability of the anterograde IFT trains in the cilium (Li et al, 2010). In addition, both ARL3 and ARL13B have roles in facilitating the traffic of subsets of ciliary cargo to the cilium. Myristoylated cargo such as peripheral membrane protein Nephrocystin-3 (NPHP3) is targeted to the cilium in a UNC119- and ARL3-dependent manner, while ARL13B is required for the PDE6-dependent ciliary localization of INPP5E (Wright et al, 2011; Humbert et al, 2012; reviewed in Li et al, 2012). ARL6 was also identified as BBS3, a gene that when mutated gives rise to the ciliopathy Bardet-Biedl syndrome (BBS). ARL6 acts upstream of a complex of 8 other BBS-associated proteins known as the BBSome. ARL6 and the BBSome are required for the ciliary targeting of proteins including the melanin concentrating hormone receptor (MCHR) and the somatostatin receptor (SSTR3), among others (Nachury et al, 2007; Loktev et al, 2008; Jin et al, 2010; Zhang et al, 2011). Both the BBSome and ARL6 may continue to be associated with cargo inside the cilium, as they are observed to undergo typical IFT movements along the axoneme (Fan et al, 2004; Lechtreck et al, 2009; reviewed in Li et al, 2012).

Set (1 results from a total of 1)

Identifier: R-HSA-1806215
Species: Homo sapiens
Compartment: cytosol
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