Mammalian Sin3 (mSin3) is a 150 kDa protein closely related to the yeast SIN3 repressor protein involved in the transcriptional repression of many genes. There are two mammalian isoforms, mSin3A and mSin3B. Containing 4 paired amphipathic helix domains (PAH domains), mSin3A and mSin3B have been shown to directly interact with several other transcriptional repressor proteins including HDAC1, HDAC2, RbAp46, the methyl CpG binding protein MeCP2, the Mad/Max heterodimer, and the corepressors silencing mediator of retinoic acid and thyroid hormone receptor (SMRT) and nuclear receptor corepressor (N-CoR).
Protein Aliases: Histone deacetylase complex subunit Sin3a; Mammalian Sin3A; Paired amphipathic helix protein Sin3a; SIN; SIN3 homolog A, transcription regulator; SIN3 transcription regulator homolog A; SIN3A; transcriptional co-repressor Sin3A; Transcriptional corepressor Sin3a; transcriptional regulator, SIN3 yeast homolog A; transcriptional regulator, SIN3A
Gene Aliases: AW553200; Kiaa4126; mKIAA4126; mSin3A; Sin3; SIN3A
Molecular Function: chromatin/chromatin-binding, or -regulatory protein