NCIt definition : Histone deacetylase 2 (488 aa, 55 kDa) is encoded by the human HDAC2 gene. This protein
plays a role in histone deacetylation, chromatin remodeling and embryonic structure
development.;
NCIt note : One of three identified histone deacetylases with similarity to the yeast global transcriptional
regulator Rpd3p, HDAC2 is found in transcription factor co-repressor complexes that
include HDAC1. BRCA1 interacts with HDAC1 and HDAC2. Acetylation of histone destabilizes
nucleosomes allowing transcription factors access to recognition elements in DNA.
Deacetylation reseals the chromosomal package, repressing transcription. DNMT1 can
establish a repressive transcription complex with HDAC2, and DMAP1. HDAC2 joins DNMT1
and DMAP1 during late S-phase, suggesting how histones may become deacetylated in
heterochromatin following replication. (from OMIM 605164 and NCI);