Phospho-Histone H3 (HIST1H3I) Antibody – Rabbit Polyclonal

Histones are basic nuclear proteins that are responsible for the nucleosome structure of the chromosomal fiber in eukaryotes. Two molecules of each of the four core histones (H2A, H2B, H3, and H4) form an octamer, around which approximately 146 bp of DNA is wrapped in repeating units, called nucleosomes. The linker histone, H1, interacts with linker DNA between nucleosomes and functions in the compaction of chromatin into higher order structures. This gene is intronless and encodes a replication-dependent histone that is a member of the histone H3 family. Transcripts from this gene lack polyA tails but instead contain a palindromic termination element. This gene is found in the small histone gene cluster on chromosome 6p22-p21.3. [provided by RefSeq, Aug 2015]

H3: Core component of nucleosome. Nucleosomes wrap and compact DNA into chromatin, limiting DNA accessibility to the cellular machineries which require DNA as a template. Histones thereby play a central role in transcription regulation, DNA repair, DNA replication and chromosomal stability. DNA accessibility is regulated via a complex set of post-translational modifications of histones, also called histone code, and nucleosome remodeling. The nucleosome is a histone octamer containing two molecules each of H2A, H2B, H3 and H4 assembled in one H3-H4 heterotetramer and two H2A-H2B heterodimers. The octamer wraps approximately 147 bp of DNA. Belongs to the histone H3 family.

Protein type: DNA-binding

Chromosomal Location of Human Ortholog: 6p22.2

Cellular Component: extracellular region; membrane; nuclear chromosome; nuclear chromosome, telomeric region; nucleoplasm; nucleosome; nucleus; protein complex

Molecular Function: DNA binding; histone binding; protein binding; protein heterodimerization activity

Biological Process: blood coagulation; cellular protein metabolic process; chromatin silencing at rDNA; DNA replication-dependent nucleosome assembly; negative regulation of gene expression, epigenetic; nucleosome assembly; positive regulation of defense response to virus by host; positive regulation of gene expression, epigenetic; protein heterotetramerization; RNA-mediated gene silencing; telomere organization and biogenesis