Search results for KAT2B

Showing 16 results out of 35

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Protein (1 results from a total of 1)

Identifier: R-HSA-352430
Species: Homo sapiens
Compartment: nucleoplasm
Primary external reference: UniProt: KAT2B: Q92831

Set (1 results from a total of 1)

Identifier: R-HSA-9620507
Species: Homo sapiens
Compartment: nucleoplasm

Complex (5 results from a total of 12)

Identifier: R-HSA-8869505
Species: Homo sapiens
Compartment: nucleoplasm
Identifier: R-HSA-8936477
Species: Homo sapiens
Compartment: nucleoplasm
Identifier: R-HSA-8937048
Species: Homo sapiens
Compartment: nucleoplasm
Identifier: R-HSA-8937036
Species: Homo sapiens
Compartment: nucleoplasm
Identifier: R-HSA-8936977
Species: Homo sapiens
Compartment: nucleoplasm

Reaction (5 results from a total of 17)

Identifier: R-HSA-9620515
Species: Homo sapiens
Compartment: nucleoplasm
KAT2B (PCAF) and possibly EP300 (p300) acetylate FOXO3 under conditions of oxidative stress (Brunet et al. 2004).
Identifier: R-HSA-5250930
Species: Homo sapiens
Compartment: nucleoplasm
Direct interactions between BAZ1B (WSTF) and histone acetyltransferases KAT2B, KAT2A, and EP300 are weak (Vintermist et al. 2011) so the acetyltransferases may interact with other subunits of B‑WICH or with proteins not in the B‑WICH complex. The ERCC6 (CSB) component of B‑WICH and MYOIC interact with KAT2B (PCAF) (Sarshad et al. 2013, Shen et al. 2013). The histone acetyltransferases are believed to acetylate histone H3 at lysine‑9 in rDNA since this modification is reduced in WSTF and MYOIC knockdown cells (Vintermist et al. 2011, Sarshad et al. 2013). Knockdown of KAT2B causes loss of acetylation on histone H4 and on histone H3 at lysine‑9 (Shen et al. 2013).
Identifier: R-HSA-5250938
Species: Homo sapiens
Compartment: nucleoplasm
Histone acetyltransferases recruited by the B‑WICH complex acetylate histone H3 at lysine‑9. Knockdown of the BAZ1B (WSTF) and MYOIC components of B‑WICH cause a loss of histone acetyltransferases KAT2B (PCAF), KAT2A (GCN5), and EP300 (p300) and a reduction of acetylated histone H3. Knockdown of KAT2B (PCAF) causes a reduction in acetylation of histone H3 at lysine‑9, leading to reduced rRNA synthesis levels (Sarshad et al. 2013, Shen et al. 2013).
Identifier: R-HSA-2032794
Species: Homo sapiens
Compartment: nucleoplasm
In the nucleus the WWTR1 (TAZ) transcriptional coactivator can bind the TBX5 transcription factor and PCAF (KAT2B) histone acetyltransferase to form a complex. The stoichiometry of this complex is unknown (Murakami et al. 2005).
Identifier: R-HSA-2032800
Species: Homo sapiens
Compartment: extracellular region
Transcription of the NPPA (ANF) gene is stimulated by the action of a transcription factor complex that includes WWTR1 (TAZ), TBX5, and the PCAF (KAT2B) histone acetyltransferase (Murakami et al. 2005). Homeobox protein NKX-2.5 (NKX2-5), in cooperation with transcription factor GATA-4 (GATA4) and interacting partners homeodomain-interacting protein kinase 1 and 2 (HIPK1 and 2), acts as a transcriptional activator factor of NPPA in mice (Lee et al. 1998). Defects in NKX2-5 can cause diverse cardiac developmental disorders (Schott et al. 1998, Benson et al. 1999).

Pathway (3 results from a total of 3)

Identifier: R-HSA-5250913
Species: Homo sapiens
Compartment: nucleoplasm
Transcription of rRNA genes is controlled by epigenetic activation and repression according to the metabolic requirements of the cell (reviewed in Percipalle and Farrants 2006, McStay and Grummt 2008, Goodfellow and Zomerdijk 2012, Grummt and Langst 2013). Depending on the growth state of the cell, about half of the approximately 400 rRNA genes are expressed and these have the modifications characteristic of active chromatin: unmethylated DNA and acetylated histones. Repressed genes generally have methylated DNA and histone H3 methylated at lysine-9. Regulators of activation include ERCC6 (CSB), histone acetylases such as KAT2B (PCAF), and the B-WICH complex. Dysregulation of RNA polymerase I transcription plays a role in disease (reviewed in Hannan et al. 2013).
The B-WICH complex positively regulates rRNA expression by remodeling chromatin and recruiting histone acetyltransferases that modify histones to transcriptionally active states
ERCC6 (CSB) and EHMT2(G9a) positively regulate rRNA expression by ERCC6 recruiting the histone methyltransferase EHMT2 (also known as G9a) which dimethylates histone H3 at lysine-9 within the transcribed regions of rRNA genes.
ERCC6 (CSB) and KAT2B (PCAF) positively regulate rRNA expression by ERCC6 recruiting the histone acetyltransferase KAT2B to the promoter where KAT2B acetylates histone H4 at several lysine residues and histone H3 at lysine-9. The acetylated chromatin facilitates the assembly of RNA polymerase I initiation complex.
Identifier: R-HSA-212165
Species: Homo sapiens
Compartment: nucleoplasm
Epigenetic processes regulate gene expression by modulating the frequency, rate, or extent of gene expression in a mitotically or meiotically heritable way that does not entail a change in the DNA sequence. Originally the definition applied only to heritability across generations but later also encompassed the heritable changes that occur during cellular differentiation within one organism.
Molecular analysis shows epigenetic changes comprise covalent modifications, such as methylation and acetylation, to DNA and histones. RNA interference has been implicated in the initiation of some epigenetic changes, for example transcriptional silencing of transposons. Proteins which bind to the modified DNA and histones are then responsible for repressing transcription and for maintaining the epigenetic modifications during cell division.
During differentiation, patterns of gene expression are established by polycomb complexes PRC1 and PRC2. PRC2 methylates histones and DNA to produce the initial marks of repression: trimethylated lysine-27 on histone H3 (H3K27me3) and 5-methylcytosine in DNA. PRC2, through its component EZH2 or, in some complexes, EZH1 trimethylates lysine-27 of histone H3. The H3K27me3 produced by PRC2 is bound by the Polycomb subunit of PRC1. PRC1 ubiquitinates histone H2A and maintains repression.
PRC2 and other epigenetic systems modulate gene expression through DNA methyation, the transfer of a methyl group from S-adenosylmethionine to the 5 position of cytosine in DNA by a family of DNA methyltransferases (DNMTs): DNMT1, DNMT3A, and DNMT3B.
In the reverse process TET1,2,3 and TDG demethylate DNA through the oxidation of the methyl group of 5-methylcytosine by TET enzymes and the excision of the oxidized product (5-formylcytosine or 5-carboxylcytosine) by TDG.
Ribosomal RNA (rRNA) genes are activated and deactivated according to the metabolic requirements of the cell. Positive epigenetic regulation of rRNA expression occurs through chromatin modifications produced by activators such as ERCC6 (CSB), the B-WICH complex, and histone acetylases such as KAT2B (PCAF). Negative epigenetic regulation of rRNA expression occurs through chromatin modifications produced by repressors such as the eNoSC complex, SIRT1, and the NoRC complex.
Identifier: R-HSA-8936459
Species: Homo sapiens
In human hematopoietic progenitors, RUNX1 and its partner CBFB are up-regulated at the onset of megakaryocytic differentiation and down-regulated at the onset of erythroid differentiation. The complex of RUNX1 and CBFB cooperates with the transcription factor GATA1 in the transactivation of megakaryocyte-specific genes. In addition, RUNX1 and GATA1 physically interact (Elagib et al. 2003), and this interaction involves the zinc finger domain of GATA1 (Xu et al. 2006). Other components of the RUNX1:CBFB activating complex at megakaryocytic promoters are GATA1 heterodimerization partner, ZFPM1 (FOG1), histone acetyltransferases EP300 (p300) and KAT2B (PCAF), the WDR5-containing histone methyltransferase MLL complex and the arginine methyltransferase PRMT1 (Herglotz et al. 2013). In the absence of PRMT1, the transcriptional repressor complex can form at megakaryocytic promoters, as RUNX1 that is not arginine methylated can bind to SIN3A/SIN3B co-repressors (Zhao et al. 2008). Besides SIN3A/SIN3B, the RUNX1:CBFB repressor complex at megakaryocytic promoters also includes histone deacetylase HDAC1 and histone arginine methyltransferase PRMT6 (Herglotz et al. 2013).
Megakaryocytic promoters regulated by the described RUNX1:CBFB activating and repressing complexes include ITGA2B, GP1BA, THBS1 and MIR27A (Herglotz et al. 2013). ITGA2B is only expressed in maturing megakaryocytes and platelets and is involved in platelet aggregation (Block and Poncz 1995). GP1BA is expressed at the cell surface membrane of maturing megakaryocytes and platelets and participates in formation of platelet plugs (Cauwenberghs et al. 2000, Jilma-Stohlawetz et al. 2003, Debili et al. 1990). THBS1 homotrimers contribute to stabilization of the platelet aggregate (Bonnefoy and Hoylaerts 2008). MIR27A is a negative regulator of RUNX1 mRNA translation and may be involved in erythroid/megakaryocytic lineage determination (Ben-Ami et al. 2009).
The RUNX1:CBFB complex stimulates transcription of the PF4 gene, encoding a component of platelet alpha granules (Aneja et al. 2011), the NR4A3 gene, associated with the familial platelet disorder (FPD) (Bluteau et al. 2011), the PRKCQ gene, associated with inherited thrombocytopenia (Jalagadugula et al. 2011), the MYL9 gene, involved in thrombopoiesis (Jalagadugula et al. 2010), and the NFE2 gene, a regulator of erythroid and megakaryocytic maturation and differentiation (Wang et al. 2010).

Icon (1 results from a total of 1)

Species: Homo sapiens
Curator: Bruce May
Designer: Cristoffer Sevilla
KAT2A,B icon
Set of Histone acetyltransferase KAT2A and KAT2B
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