Core histone macro-H2A.1

UniProtKB accession:  Q02874

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UniProtKB description:  Variant histone H2A which replaces conventional H2A in a subset of nucleosomes where it represses transcription. Nucleosomes wrap and compact DNA into chromatin, limiting DNA accessibility to the cellular machineries which require DNA as a template (PubMed:16107708). Histones thereby play a central role in transcription regulation, DNA repair, DNA replication and chromosomal stability (PubMed:16107708). DNA accessibility is regulated via a complex set of post-translational modifications of histones, also called histone code, and nucleosome remodeling (PubMed:16107708). Involved in stable X chromosome inactivation. Inhibits the binding of transcription factors, including NF-kappa-B, and interferes with the activity of remodeling SWI/SNF complexes (By similarity). Inhibits histone acetylation by EP300 and recruits class I HDACs, which induces a hypoacetylated state of chromatin (By similarity).