ID   HSP3_BOLBR              Reviewed;          54 AA.
AC   P83213;
DT   15-NOV-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-MAR-2002, sequence version 1.
DT   25-MAY-2022, entry version 49.
DE   RecName: Full=Sperm protamine P3;
OS   Bolinus brandaris (Purple dye murex) (Murex brandaris).
OC   Eukaryota; Metazoa; Spiralia; Lophotrochozoa; Mollusca; Gastropoda;
OC   Caenogastropoda; Neogastropoda; Muricoidea; Muricidae; Bolinus.
OX   NCBI_TaxID=179646 {ECO:0000305};
RN   [1] {ECO:0000305}
RP   PROTEIN SEQUENCE, FUNCTION, SUBCELLULAR LOCATION, AND MASS SPECTROMETRY.
RC   TISSUE=Gonad, and Sperm;
RX   PubMed=9872998; DOI=10.1074/jbc.274.2.649;
RA   Caceres C., Gimenez-Bonafe P., Ribes E., Wouters-Tyrou D., Martinage A.,
RA   Kouach M., Sautiere P., Muller S., Palau J., Subirana J.A., Cornudella L.,
RA   Chiva M.;
RT   "DNA-interacting proteins in the spermiogenesis of the mollusc Murex
RT   brandaris.";
RL   J. Biol. Chem. 274:649-656(1999).
CC   -!- FUNCTION: Protamines substitute for histones in the chromatin of sperm
CC       during the haploid phase of spermatogenesis. They compact sperm DNA
CC       into a highly condensed, stable and inactive complex.
CC       {ECO:0000269|PubMed:9872998}.
CC   -!- SUBCELLULAR LOCATION: Nucleus {ECO:0000269|PubMed:9872998}. Chromosome
CC       {ECO:0000269|PubMed:9872998}.
CC   -!- TISSUE SPECIFICITY: Gonads. {ECO:0000269|PubMed:9872998}.
CC   -!- MASS SPECTROMETRY: Mass=6474; Method=Electrospray;
CC       Evidence={ECO:0000269|PubMed:9872998};
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DR   AlphaFoldDB; P83213; -.
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:0030154; P:cell differentiation; IEA:UniProtKB-KW.
DR   GO; GO:0030261; P:chromosome condensation; IEA:UniProtKB-KW.
DR   GO; GO:0007283; P:spermatogenesis; IEA:UniProtKB-KW.
PE   1: Evidence at protein level;
KW   Chromosome; Developmental protein; Differentiation;
KW   Direct protein sequencing; DNA condensation; DNA-binding; Nucleosome core;
KW   Nucleus; Spermatogenesis.
FT   CHAIN           1..54
FT                   /note="Sperm protamine P3"
FT                   /id="PRO_0000106642"
FT   REGION          1..54
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   54 AA;  6476 MW;  832668DC39A8E208 CRC64;
     RRRRRRGKGK GGKKKKGKKR RRRGRKGKGK GKKKGKRKGK RGGKRRRRRR KGKK