Histone-lysine N-methyltransferase SETDB1 is an enzyme that in humans is encoded by the SETDB1gene.[5][6] SETDB1 is also known as KMT1E or H3K9 methyltransferase ESET.
Function
The SET domain is a highly conserved, approximately 150-amino acid motif implicated in the modulation of chromatin structure. It was originally identified as part of a larger conserved region present in the Drosophila Trithorax protein and was subsequently identified in the Drosophila Su(var)3-9 and 'Enhancer of zeste' proteins, from which the acronym SET is derived. Studies have suggested that the SET domain may be a signature of proteins that modulate transcriptionally active or repressed chromatin states through chromatin remodeling activities.[6]
During meiosis, synapsis of homologous chromosomes ensures correct homologous chromosome segregation. Asynapsed homologs are transcriptionally inactivated by a process of meiotic silencing.[7] Meiotic silencing depends on the DNA damage response network.[7] SETDB1 protein has been identified as the bridge linking the DNA damage response to chromosome silencing in male mice.[7]
^"Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^"Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^Harte PJ, Wu W, Carrasquillo MM, Matera AG (June 1999). "Assignment of a novel bifurcated SET domain gene, SETDB1, to human chromosome band 1q21 by in situ hybridization and radiation hybrids". Cytogenet. Cell Genet. 84 (1–2): 83–6. doi:10.1159/000015220. PMID10343109. S2CID10805552.
Yang L, Xia L, Wu DY, Wang H, Chansky HA, Schubach WH, Hickstein DD, Zhang Y (2002). "Molecular cloning of ESET, a novel histone H3-specific methyltransferase that interacts with ERG transcription factor". Oncogene. 21 (1): 148–52. doi:10.1038/sj.onc.1204998. PMID11791185. S2CID10912876.
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