ID   H2BS2_PARAN             Reviewed;         144 AA.
AC   P02291;
DT   21-JUL-1986, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 2.
DT   03-AUG-2022, entry version 91.
DE   RecName: Full=Histone H2B.2, sperm;
OS   Parechinus angulosus (Angulate sea urchin) (Cidaris angulosus).
OC   Eukaryota; Metazoa; Echinodermata; Eleutherozoa; Echinozoa; Echinoidea;
OC   Euechinoidea; Echinacea; Camarodonta; Echinidea; Echinidae; Parechinus.
OX   NCBI_TaxID=7658;
RN   [1]
RP   PROTEIN SEQUENCE OF 2-144.
RX   PubMed=891535; DOI=10.1111/j.1432-1033.1977.tb11666.x;
RA   Strickland W.N., Strickland M., Brandt W.F., von Holt C.;
RT   "The complete amino-acid sequence of histone H2B(2) from sperm of the sea
RT   urchin Parechinus angulosus.";
RL   Eur. J. Biochem. 77:277-286(1977).
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   -!- DOMAIN: Contains 5 SPKK motifs which may interact with the minor groove
CC       of A/T-rich DNA sites. Phosphorylation of this motif may regulate DNA
CC       binding. This motif is reiterated in both termini of histone H1 and in
CC       the C-terminus of plant H2A, but its presence in the N-terminus seems
CC       to be unique to sea urchin histones H2B.
CC   -!- PTM: Monoubiquitination of Lys-139 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   -!- PTM: Phosphorylated on SPKK motifs 3, 4 and 5; which may regulate DNA
CC       binding. Dephosphorylated during maturation of spermatids to mature
CC       sperm and rephosphorylated at fertilization (By similarity).
CC       {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the histone H2B family. {ECO:0000305}.
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DR   PIR; A02619; HSUR6P.
DR   AlphaFoldDB; P02291; -.
DR   SMR; P02291; -.
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   Chromosome; Direct protein sequencing; DNA-binding; Glycoprotein;
KW   Isopeptide bond; Nucleosome core; Nucleus; Phosphoprotein; Ubl conjugation.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000269|PubMed:891535"
FT   CHAIN           2..144
FT                   /note="Histone H2B.2, sperm"
FT                   /id="PRO_0000071889"
FT   REGION          1..51
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   MOTIF           4..7
FT                   /note="SPKK motif 1"
FT   MOTIF           9..12
FT                   /note="SPKK motif 2"
FT   MOTIF           14..17
FT                   /note="SPKK motif 3"
FT   MOTIF           19..22
FT                   /note="SPKK motif 4"
FT   MOTIF           25..28
FT                   /note="SPKK motif 5"
FT   COMPBIAS        16..51
FT                   /note="Basic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   MOD_RES         14
FT                   /note="Phosphoserine"
FT                   /evidence="ECO:0000250"
FT   MOD_RES         19
FT                   /note="Phosphoserine"
FT                   /evidence="ECO:0000250"
FT   MOD_RES         25
FT                   /note="Phosphoserine"
FT                   /evidence="ECO:0000250"
FT   CARBOHYD        131
FT                   /note="O-linked (GlcNAc) serine"
FT                   /evidence="ECO:0000250"
FT   CROSSLNK        139
FT                   /note="Glycyl lysine isopeptide (Lys-Gly) (interchain with
FT                   G-Cter in ubiquitin)"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   144 AA;  15963 MW;  FA18B8158D074BDC CRC64;
     MPRSPAKTSP RKGSPRKGSP SRKASPKRGG KGAKRAGKGG RRRRVVKRRR RRRESYGIYI
     YKVLKQVHPD TGISSRAMSV MNSFVNDVFE RIAGEASRLT SANRRSTVSS REIQTAVRLL
     LPGELAKHAV SEGTKAVTKY TTSR