ID   H2B_OLILU               Reviewed;         114 AA.
AC   P82887;
DT   27-JUN-2003, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 2.
DT   03-AUG-2022, entry version 65.
DE   RecName: Full=Histone H2B;
OS   Olisthodiscus luteus (Marine phytoflagellate).
OC   Eukaryota; Sar; Stramenopiles; Ochrophyta; Olisthodiscophyceae;
OC   Olisthodiscaceae; Olisthodiscus.
OX   NCBI_TaxID=83000;
RN   [1] {ECO:0000305}
RP   PROTEIN SEQUENCE OF 2-114, AND ACETYLATION AT LYS-3.
RA   Rodrigues J.A., Spit A., Brandt W.F.;
RL   Submitted (DEC-2000) to UniProtKB.
CC   -!- FUNCTION: Core component of nucleosome. Nucleosomes wrap and compact
CC       DNA into chromatin, limiting DNA accessibility to the cellular
CC       machineries which require DNA as a template. Histones thereby play a
CC       central role in transcription regulation, DNA repair, DNA replication
CC       and chromosomal stability. DNA accessibility is regulated via a complex
CC       set of post-translational modifications of histones, also called
CC       histone code, and nucleosome remodeling.
CC   -!- SUBUNIT: The nucleosome is a histone octamer containing two molecules
CC       each of H2A, H2B, H3 and H4 assembled in one H3-H4 heterotetramer and
CC       two H2A-H2B heterodimers. The octamer wraps approximately 147 bp of
CC       DNA.
CC   -!- SUBCELLULAR LOCATION: Nucleus. Chromosome.
CC   -!- PTM: Monoubiquitination of Lys-110 gives a specific tag for epigenetic
CC       transcriptional activation and is also prerequisite for histone H3
CC       'Lys-4' and 'Lys-79' methylation. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the histone H2B family. {ECO:0000305}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   AlphaFoldDB; P82887; -.
DR   SMR; P82887; -.
DR   GO; GO:0000786; C:nucleosome; IEA:UniProtKB-KW.
DR   GO; GO:0005634; C:nucleus; IEA:UniProtKB-SubCell.
DR   GO; GO:0003677; F:DNA binding; IEA:UniProtKB-KW.
DR   GO; GO:0046982; F:protein heterodimerization activity; IEA:InterPro.
DR   GO; GO:0030527; F:structural constituent of chromatin; IEA:InterPro.
DR   Gene3D; 1.10.20.10; -; 1.
DR   InterPro; IPR009072; Histone-fold.
DR   InterPro; IPR007125; Histone_H2A/H2B/H3.
DR   InterPro; IPR000558; Histone_H2B.
DR   PANTHER; PTHR23428; PTHR23428; 1.
DR   Pfam; PF00125; Histone; 1.
DR   PRINTS; PR00621; HISTONEH2B.
DR   SMART; SM00427; H2B; 1.
DR   SUPFAM; SSF47113; SSF47113; 1.
DR   PROSITE; PS00357; HISTONE_H2B; 1.
PE   1: Evidence at protein level;
KW   Acetylation; Chromosome; Direct protein sequencing; DNA-binding;
KW   Isopeptide bond; Nucleosome core; Nucleus; Ubl conjugation.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000269|Ref.1"
FT   CHAIN           2..114
FT                   /note="Histone H2B"
FT                   /id="PRO_0000071871"
FT   REGION          1..22
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   MOD_RES         3
FT                   /note="N6-acetyllysine"
FT                   /evidence="ECO:0000269|Ref.1"
FT   CROSSLNK        110
FT                   /note="Glycyl lysine isopeptide (Lys-Gly) (interchain with
FT                   G-Cter in ubiquitin)"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   114 AA;  12662 MW;  C85728D45B37C4D3 CRC64;
     MAKTPSKKAA KAPKKAGSKR NKRVETYSSY IYKVLKQVHP DTGISKRGMS IMNSFINDIF
     ERLAGEASRL ARYNKRSTLS SREIQTAVRL MLPGELAKHA VSEGTKAVTK FTSN