P69069 · H2B_ONCMY

Function

function

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.

GO annotations

all annotationsall molecular functionvirus receptor activitydna bindingrna bindingcytoskeletal motor activitycatalytic activitygtpase activitystructural molecule activitytransporter activitycytoskeletal protein bindinglipid bindingcyclase activityantioxidant activityoxidoreductase activitytransferase activityhydrolase activitylyase activityisomerase activityligase activityprotein tag activitycargo receptor activityhistone bindingprotein folding chaperonetranslation regulator activitynutrient reservoir activityreceptor ligand activitymolecular transducer activitymolecular adaptor activitytoxin activitycell adhesion mediator activitymolecular function regulator activityvirus coreceptor activitycatalytic activity, acting on a proteincatalytic activity, acting on dnacatalytic activity, acting on rnamolecular carrier activitytranscription regulator activitygeneral transcription initiation factor activitymolecular sensor activitymolecular sequestering activityatp-dependent activityother molecular functionall biological processmitotic cell cyclecytokinesiscytoplasmic translationimmune system processmuscle system processcirculatory system processrenal system processrespiratory system processcarbohydrate metabolic processgeneration of precursor metabolites and energydna replicationdna repairdna recombinationchromatin organizationdna-templated transcriptionregulation of dna-templated transcriptiontrna metabolic processprotein foldingprotein glycosylationamino acid metabolic processmodified amino acid metabolic processlipid metabolic processvitamin metabolic processsulfur compound metabolic processintracellular protein transportnucleocytoplasmic transportautophagyinflammatory responsemitochondrion organizationcytoskeleton organizationmicrotubule-based movementperoxisome organizationlysosome organizationchromosome segregationcell adhesionestablishment or maintenance of cell polarityprogrammed cell deathphotosynthesismrna metabolic processsnrna metabolic processvesicle-mediated transportreproductive processdigestive system processsignalingcell differentiationprotein catabolic processextracellular matrix organizationregulatory ncrna-mediated gene silencingtelomere organizationcell junction organizationwound healingribosome biogenesiscilium organizationanatomical structure developmentcell motilitynervous system processendocrine processprotein maturationtransmembrane transportnucleobase-containing small molecule metabolic processhepaticobiliary system processmembrane organizationprotein-containing complex assemblycell wall organization or biogenesisnitrogen cycle metabolic processprotein localization to plasma membranedefense response to other organismdetoxificationmeiotic nuclear divisionmitotic nuclear divisionmitochondrial gene expressioncarbohydrate derivative metabolic processother biological processall cellular componentnuclear chromosomeextracellular regionextracellular spacecell wallnucleusnuclear envelopenucleoplasmchromosomenucleolusmitochondrionlysosomeendosomevacuoleperoxisomeendoplasmic reticulumgolgi apparatuslipid dropletmicrotubule organizing centercytosolribosomecytoskeletonplasma membraneciliumplastidthylakoidexternal encapsulating structureextracellular matrixcytoplasmic vesicleorganelleother cellular component
Cell color indicative of number of GO terms
AspectTerm
Cellular Componentnucleosome
Cellular Componentnucleus
Molecular FunctionDNA binding
Molecular Functionprotein heterodimerization activity
Molecular Functionstructural constituent of chromatin

Keywords

Names & Taxonomy

Protein names

  • Recommended name
    Histone H2B

Organism names

Accessions

  • Primary accession
    P69069
  • Secondary accessions
    • P02282

Proteomes

Subcellular Location

PTM/Processing

Features

Showing features for initiator methionine, chain, modified residue, glycosylation, cross-link.

TypeIDPosition(s)Description
Initiator methionine1Removed
ChainPRO_00000718512-124Histone H2B
Modified residue6N6-acetyllysine
Modified residue11N6-acetyllysine
Modified residue13Phosphoserine
Modified residue14N6-acetyllysine
Modified residue19N6-acetyllysine
Glycosylation111O-linked (GlcNAc) serine
Cross-link119Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)

Post-translational modification

Monoubiquitination of Lys-119 by BRE1 gives a specific tag for epigenetic transcriptional activation and is also prerequisite for histone H3 'Lys-4' and 'Lys-79' methylation.
Phosphorylated during apoptosis; which facilitates apoptotic chromatin condensation.
GlcNAcylation at Ser-111 promotes monoubiquitination of Lys-119. It fluctuates in response to extracellular glucose, and associates with transcribed genes (By similarity).

Keywords

PTM databases

Interaction

Subunit

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.

Structure

Family & Domains

Features

Showing features for region, compositional bias.

TypeIDPosition(s)Description
Region1-33Disordered
Compositional bias12-33Basic residues

Sequence similarities

Belongs to the histone H2B family.

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    124
  • Mass (Da)
    13,596
  • Last updated
    2007-01-23 v2
  • Checksum
    30097D5582BE0B84
MPEPAKSAPKKGSKKAVTKTAGKGGKKRKRSRKESYAIYVYKVLKQVHPDTGISSKAMGIMNSFVNDIFERIAGESSRLAHYNKRSTITSREIQTAVRLLLPGELAKHAVSEGTKAVTKYTSSK

Features

Showing features for compositional bias, sequence conflict.

TypeIDPosition(s)Description
Compositional bias12-33Basic residues
Sequence conflict29-30in Ref. 1; CAA26673

Keywords

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
X02916
EMBL· GenBank· DDBJ
CAA26673.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. Our staff consists of biologists and biochemists that are not trained to give medical advice.
We'd like to inform you that we have updated our Privacy Notice to comply with Europe’s new General Data Protection Regulation (GDPR) that applies since 25 May 2018.
FeedbackHelp