P69069 · H2B_ONCMY
- ProteinHistone H2B
- StatusUniProtKB reviewed (Swiss-Prot)
- Amino acids124 (go to sequence)
- Protein existenceEvidence at protein level
- Annotation score4/5
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 annotations | all molecular function | virus receptor activity | dna binding | rna binding | cytoskeletal motor activity | catalytic activity | gtpase activity | structural molecule activity | transporter activity | cytoskeletal protein binding | lipid binding | cyclase activity | antioxidant activity | oxidoreductase activity | transferase activity | hydrolase activity | lyase activity | isomerase activity | ligase activity | protein tag activity | cargo receptor activity | histone binding | protein folding chaperone | translation regulator activity | nutrient reservoir activity | receptor ligand activity | molecular transducer activity | molecular adaptor activity | toxin activity | cell adhesion mediator activity | molecular function regulator activity | virus coreceptor activity | catalytic activity, acting on a protein | catalytic activity, acting on dna | catalytic activity, acting on rna | molecular carrier activity | transcription regulator activity | general transcription initiation factor activity | molecular sensor activity | molecular sequestering activity | atp-dependent activity | other molecular function | all biological process | mitotic cell cycle | cytokinesis | cytoplasmic translation | immune system process | muscle system process | circulatory system process | renal system process | respiratory system process | carbohydrate metabolic process | generation of precursor metabolites and energy | dna replication | dna repair | dna recombination | chromatin organization | dna-templated transcription | regulation of dna-templated transcription | trna metabolic process | protein folding | protein glycosylation | amino acid metabolic process | modified amino acid metabolic process | lipid metabolic process | vitamin metabolic process | sulfur compound metabolic process | intracellular protein transport | nucleocytoplasmic transport | autophagy | inflammatory response | mitochondrion organization | cytoskeleton organization | microtubule-based movement | peroxisome organization | lysosome organization | chromosome segregation | cell adhesion | establishment or maintenance of cell polarity | programmed cell death | photosynthesis | mrna metabolic process | snrna metabolic process | vesicle-mediated transport | reproductive process | digestive system process | signaling | cell differentiation | protein catabolic process | extracellular matrix organization | regulatory ncrna-mediated gene silencing | telomere organization | cell junction organization | wound healing | ribosome biogenesis | cilium organization | anatomical structure development | cell motility | nervous system process | endocrine process | protein maturation | transmembrane transport | nucleobase-containing small molecule metabolic process | hepaticobiliary system process | membrane organization | protein-containing complex assembly | cell wall organization or biogenesis | nitrogen cycle metabolic process | protein localization to plasma membrane | defense response to other organism | detoxification | meiotic nuclear division | mitotic nuclear division | mitochondrial gene expression | carbohydrate derivative metabolic process | other biological process | all cellular component | nuclear chromosome | extracellular region | extracellular space | cell wall | nucleus | nuclear envelope | nucleoplasm | chromosome | nucleolus | mitochondrion | lysosome | endosome | vacuole | peroxisome | endoplasmic reticulum | golgi apparatus | lipid droplet | microtubule organizing center | cytosol | ribosome | cytoskeleton | plasma membrane | cilium | plastid | thylakoid | external encapsulating structure | extracellular matrix | cytoplasmic vesicle | organelle | other cellular component | |||
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Aspect | Term | |
---|---|---|
Cellular Component | nucleosome | |
Cellular Component | nucleus | |
Molecular Function | DNA binding | |
Molecular Function | protein heterodimerization activity | |
Molecular Function | structural constituent of chromatin |
Keywords
- Molecular function
Names & Taxonomy
Protein names
- Recommended nameHistone H2B
Organism names
- Taxonomic lineageEukaryota > Metazoa > Chordata > Craniata > Vertebrata > Euteleostomi > Actinopterygii > Neopterygii > Teleostei > Protacanthopterygii > Salmoniformes > Salmonidae > Salmoninae > Oncorhynchus
Accessions
- Primary accessionP69069
- Secondary accessions
Proteomes
Subcellular Location
PTM/Processing
Features
Showing features for initiator methionine, chain, modified residue, glycosylation, cross-link.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Initiator methionine | 1 | Removed | ||||
Sequence: M | ||||||
Chain | PRO_0000071851 | 2-124 | Histone H2B | |||
Sequence: PEPAKSAPKKGSKKAVTKTAGKGGKKRKRSRKESYAIYVYKVLKQVHPDTGISSKAMGIMNSFVNDIFERIAGESSRLAHYNKRSTITSREIQTAVRLLLPGELAKHAVSEGTKAVTKYTSSK | ||||||
Modified residue | 6 | N6-acetyllysine | ||||
Sequence: K | ||||||
Modified residue | 11 | N6-acetyllysine | ||||
Sequence: K | ||||||
Modified residue | 13 | Phosphoserine | ||||
Sequence: S | ||||||
Modified residue | 14 | N6-acetyllysine | ||||
Sequence: K | ||||||
Modified residue | 19 | N6-acetyllysine | ||||
Sequence: K | ||||||
Glycosylation | 111 | O-linked (GlcNAc) serine | ||||
Sequence: S | ||||||
Cross-link | 119 | Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin) | ||||
Sequence: K |
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
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.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Region | 1-33 | Disordered | ||||
Sequence: MPEPAKSAPKKGSKKAVTKTAGKGGKKRKRSRK | ||||||
Compositional bias | 12-33 | Basic residues | ||||
Sequence: GSKKAVTKTAGKGGKKRKRSRK |
Sequence similarities
Belongs to the histone H2B family.
Family and domain databases
Sequence
- Sequence statusComplete
- Length124
- Mass (Da)13,596
- Last updated2007-01-23 v2
- Checksum30097D5582BE0B84
Features
Showing features for compositional bias, sequence conflict.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Compositional bias | 12-33 | Basic residues | ||||
Sequence: GSKKAVTKTAGKGGKKRKRSRK | ||||||
Sequence conflict | 29-30 | in Ref. 1; CAA26673 | ||||
Sequence: KR → RK |
Keywords
- Technical term