ID   PHI0_HOLTU              Reviewed;          78 AA.
AC   P14309;
DT   01-JAN-1990, integrated into UniProtKB/Swiss-Prot.
DT   01-JAN-1990, sequence version 1.
DT   25-MAY-2022, entry version 42.
DE   RecName: Full=Sperm-specific protein Phi-0;
OS   Holothuria tubulosa (Tubular sea cucumber).
OC   Eukaryota; Metazoa; Echinodermata; Eleutherozoa; Echinozoa; Holothuroidea;
OC   Aspidochirotacea; Aspidochirotida; Holothuriidae; Holothuria.
OX   NCBI_TaxID=7685;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   TISSUE=Sperm;
RX   PubMed=2602115; DOI=10.1093/nar/17.23.10097;
RA   Prats E., Cornudella L., Ruiz-Carrillo A.;
RT   "Nucleotide sequence of a cDNA for phi, a histone to protamine transition
RT   protein from sea cucumber spermatozoa.";
RL   Nucleic Acids Res. 17:10097-10097(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.
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DR   EMBL; M27408; AAA29204.1; -; mRNA.
DR   EMBL; X16364; CAA34410.1; -; mRNA.
DR   PIR; S06918; S06918.
DR   AlphaFoldDB; P14309; -.
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   4: Predicted;
KW   Chromosome; Developmental protein; Differentiation; DNA-binding;
KW   Nucleosome core; Nucleus; Spermatogenesis.
FT   CHAIN           1..78
FT                   /note="Sperm-specific protein Phi-0"
FT                   /id="PRO_0000106634"
FT   REGION          1..78
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   78 AA;  8680 MW;  ABFA270759614F2C CRC64;
     MVARRQTKKA RKPAARRRSA AKRAAPAAKK AASRRRPKSA KKAKPAARRR SSVKPKAAKA
     AAQVRRRSRR IRRASVSK