ID   HSP1_CHRPI              Reviewed;          59 AA.
AC   Q7LZB2;
DT   10-MAY-2004, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 2.
DT   03-AUG-2022, entry version 43.
DE   RecName: Full=Sperm protamine P1-type;
DE   AltName: Full=Protamine I-1;
OS   Chrysemys picta bellii (Western painted turtle) (Emys bellii).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC   Archelosauria; Testudinata; Testudines; Cryptodira; Durocryptodira;
OC   Testudinoidea; Emydidae; Chrysemys.
OX   NCBI_TaxID=8478;
RN   [1]
RP   PROTEIN SEQUENCE OF 2-59.
RC   TISSUE=Sperm;
RX   PubMed=8798564; DOI=10.1074/jbc.271.38.23547;
RA   Hunt J.G., Kasinsky H.E., Elsey R.M., Wright C.L., Rice P., Bell J.E.,
RA   Sharp D.J., Kiss A.J., Hunt D.F., Arnott D.P., Russ M.M., Shabanowitz J.,
RA   Ausio J.;
RT   "Protamines of reptiles.";
RL   J. Biol. Chem. 271:23547-23557(1996).
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 (By similarity).
CC       {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Nucleus {ECO:0000250}. Chromosome {ECO:0000250}.
CC   -!- TISSUE SPECIFICITY: Testis.
CC   -!- SIMILARITY: Belongs to the protamine P1 family. {ECO:0000305}.
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DR   PIR; A58208; A58208.
DR   AlphaFoldDB; Q7LZB2; -.
DR   Proteomes; UP000694380; Unplaced.
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:0030261; P:chromosome condensation; IEA:UniProtKB-KW.
DR   GO; GO:0035092; P:sperm DNA condensation; IEA:InterPro.
DR   InterPro; IPR000221; Protamine_P1.
DR   PROSITE; PS00048; PROTAMINE_P1; 1.
PE   1: Evidence at protein level;
KW   Chromosome; Developmental protein; Differentiation;
KW   Direct protein sequencing; DNA condensation; DNA-binding; Nucleosome core;
KW   Nucleus; Reference proteome; Spermatogenesis.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000269|PubMed:8798564"
FT   CHAIN           2..59
FT                   /note="Sperm protamine P1-type"
FT                   /id="PRO_0000191592"
FT   REGION          1..59
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   59 AA;  7751 MW;  3826B9CA5A246924 CRC64;
     MARYRRNRSR SRSRRRRRRR GGRGGRRGRR RRRHGQRRRG RRGRERTRRR RRRRRRSSS