Q43261 · H2B3_MAIZE
- ProteinHistone H2B.3
- StatusUniProtKB reviewed (Swiss-Prot)
- Organism
- Amino acids153 (go to sequence)
- Protein existenceInferred from homology
- 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 | nucleotide binding | molecular_function | nucleic acid binding | dna binding | chromatin binding | dna-binding transcription factor activity | rna binding | cytoskeletal motor activity | catalytic activity | nuclease activity | signaling receptor binding | structural molecule activity | transporter activity | binding | protein binding | translation factor activity, rna binding | lipid binding | kinase activity | transferase activity | hydrolase activity | oxygen binding | enzyme regulator activity | carbohydrate binding | signaling receptor activity | translation regulator activity | transcription regulator activity | other molecular function | all biological process | carbohydrate metabolic process | generation of precursor metabolites and energy | nucleobase-containing compound metabolic process | dna metabolic process | translation | lipid metabolic process | transport | response to stress | cell cycle | cell communication | signal transduction | cell-cell signaling | multicellular organism development | circadian rhythm | biological_process | metabolic process | catabolic process | biosynthetic process | response to light stimulus | response to external stimulus | tropism | response to biotic stimulus | response to abiotic stimulus | response to endogenous stimulus | embryo development | post-embryonic development | fruit ripening | abscission | pollination | flower development | cellular process | programmed cell death | photosynthesis | cellular component organization | cell growth | protein metabolic process | cellular homeostasis | secondary metabolic process | reproductive process | cell differentiation | protein modification process | growth | epigenetic regulation of gene expression | response to chemical | anatomical structure development | regulation of molecular function | other biological process | all cellular component | cellular_component | extracellular region | cell wall | intracellular anatomical structure | nucleus | nuclear envelope | nucleoplasm | nucleolus | cytoplasm | mitochondrion | lysosome | endosome | vacuole | peroxisome | endoplasmic reticulum | golgi apparatus | cytosol | ribosome | cytoskeleton | plasma membrane | chloroplast | plastid | thylakoid | membrane | external encapsulating structure | 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.3
Organism names
- Organism
- Strain
- Taxonomic lineageEukaryota > Viridiplantae > Streptophyta > Embryophyta > Tracheophyta > Spermatophyta > Magnoliopsida > Liliopsida > Poales > Poaceae > PACMAD clade > Panicoideae > Andropogonodae > Andropogoneae > Tripsacinae > Zea
Accessions
- Primary accessionQ43261
Proteomes
Subcellular Location
PTM/Processing
Features
Showing features for initiator methionine, chain, modified residue, cross-link.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Initiator methionine | 1 | Removed | ||||
Sequence: M | ||||||
Chain | PRO_0000071917 | 2-153 | Histone H2B.3 | |||
Sequence: APKADKKPAAKKPAEEEPATEKAEKAPAGKKPKAEKRLPAGKSAGKEGGEGKKGKKKAKKSVETYKIYIFKVLKQVHPDIGISSKAMSIMNSFINDIFEKLAAESAKLARYNKKPTVTSREIQTSVRLVLPGELAKHAVSEGTKAVTKFTSS | ||||||
Modified residue | 7 | N6-acetyllysine | ||||
Sequence: K | ||||||
Modified residue | 37 | N6-acetyllysine | ||||
Sequence: K | ||||||
Cross-link | 149 | Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin) | ||||
Sequence: K |
Post-translational modification
Can be acetylated to form H2BK6ac and H2BK33ac.
Monoubiquitinated to form H2BK143ub1; may give a specific tag for epigenetic transcriptional activation.
Keywords
- PTM
Expression
Gene expression 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.
Protein-protein interaction databases
Structure
Family & Domains
Features
Showing features for region.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Region | 1-60 | Disordered | ||||
Sequence: MAPKADKKPAAKKPAEEEPATEKAEKAPAGKKPKAEKRLPAGKSAGKEGGEGKKGKKKAK |
Sequence similarities
Belongs to the histone H2B family.
Phylogenomic databases
Family and domain databases
Sequence
- Sequence statusComplete
- Length153
- Mass (Da)16,492
- Last updated2007-01-23 v3
- ChecksumA9C9C26C93CD7CFF
Keywords
- Technical term