ID   PHI3_MYTCA              Reviewed;          45 AA.
AC   P11860;
DT   01-OCT-1989, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-1989, sequence version 1.
DT   03-AUG-2022, entry version 62.
DE   RecName: Full=Sperm-specific protein Phi-3;
DE   AltName: Full=PL-IV;
OS   Mytilus californianus (California mussel).
OC   Eukaryota; Metazoa; Spiralia; Lophotrochozoa; Mollusca; Bivalvia;
OC   Autobranchia; Pteriomorphia; Mytilida; Mytiloidea; Mytilidae; Mytilinae;
OC   Mytilus.
OX   NCBI_TaxID=6549;
RN   [1]
RP   PROTEIN SEQUENCE.
RX   PubMed=2666130; DOI=10.1111/j.1432-1033.1989.tb14865.x;
RA   Ausio J., McParland R.;
RT   "Sequence and characterization of the sperm-specific protein phi 3 from
RT   Mytilus californianus.";
RL   Eur. J. Biochem. 182:569-576(1989).
CC   -!- FUNCTION: Involved in nuclear basic protein transition: histones are
CC       replaced by spermatid specific proteins which are themselves replaced
CC       by protamines in late spermatids.
CC   -!- SUBCELLULAR LOCATION: Nucleus. Chromosome.
CC   -!- MISCELLANEOUS: The sequence of component I is shown.
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DR   PIR; S04941; S04941.
DR   PIR; S10544; S10544.
DR   PIR; S10545; S10545.
DR   AlphaFoldDB; P11860; -.
DR   PRIDE; P11860; -.
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:0007283; P:spermatogenesis; IEA:UniProtKB-KW.
PE   1: Evidence at protein level;
KW   Chromosome; Developmental protein; Differentiation;
KW   Direct protein sequencing; DNA-binding; Nucleosome core; Nucleus;
KW   Spermatogenesis.
FT   CHAIN           1..45
FT                   /note="Sperm-specific protein Phi-3"
FT                   /id="PRO_0000106637"
FT   REGION          1..45
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   VARIANT         6
FT                   /note="S -> T (possible variant of component I)"
FT   VARIANT         12
FT                   /note="A -> T (in component II)"
FT   VARIANT         17
FT                   /note="S -> T (possible variant of component I)"
FT   VARIANT         18
FT                   /note="S -> T (possible variant of component I)"
FT   VARIANT         39
FT                   /note="K -> R (in component III)"
SQ   SEQUENCE   45 AA;  4912 MW;  78A68DF2CB77C4E1 CRC64;
     AKAKRSPRKK KAAVKKSSKS KAKKPKSPKK KKAAKKPAKK AAKKK