NCBI Accession #
NP_001031816.1
NCBI GenBank Nucleotide #
NM_001036739.1
NCBI Official Full Name
Histone superfamily protein
NCBI Official Symbol
AT4G40040
NCBI Official Synonym Symbols
H3.3; histone 3.3; T5J17.210
NCBI Protein Information
Histone superfamily protein
UniProt Protein Name
Histone H3.3
UniProt Synonym Protein Names
Histone H3.2
UniProt Primary Accession #
P59169
UniProt Secondary Accession #
Q6NR95
UniProt Related Accession #
P59169
UniProt Comments
Variant histone H3 which replaces conventional H3 in a wide range of nucleosomes in active genes. Constitutes the predominant form of histone H3 in non-dividing cells and is incorporated into chromatin independently of DNA synthesis. Deposited at sites of nucleosomal displacement throughout transcribed genes, suggesting that it represents an epigenetic imprint of transcriptionally active chromatin. 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.