ID   OXYT_OCTVU              Reviewed;           9 AA.
AC   P80027;
DT   01-MAR-1992, integrated into UniProtKB/Swiss-Prot.
DT   01-MAR-1992, sequence version 1.
DT   07-APR-2021, entry version 53.
DE   RecName: Full=Cephalotocin;
OS   Octopus vulgaris (Common octopus).
OC   Eukaryota; Metazoa; Spiralia; Lophotrochozoa; Mollusca; Cephalopoda;
OC   Coleoidea; Octopodiformes; Octopoda; Incirrata; Octopodidae; Octopus.
OX   NCBI_TaxID=6645;
RN   [1]
RP   PROTEIN SEQUENCE, AND AMIDATION AT GLY-9.
RC   TISSUE=Nerve ending;
RX   PubMed=1589145; DOI=10.1016/0304-3940(92)90514-8;
RA   Reich G.;
RT   "A new peptide of the oxytocin/vasopressin family isolated from nerves of
RT   the cephalopod Octopus vulgaris.";
RL   Neurosci. Lett. 134:191-194(1992).
CC   -!- FUNCTION: Has a role in the neurosecretory system of the vena cava.
CC   -!- SUBCELLULAR LOCATION: Secreted.
CC   -!- SIMILARITY: Belongs to the vasopressin/oxytocin family. {ECO:0000305}.
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DR   Proteomes; UP000515154; Genome assembly.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR   GO; GO:0005185; F:neurohypophyseal hormone activity; IEA:InterPro.
DR   InterPro; IPR022423; Neurohypophysial_hormone_CS.
DR   PROSITE; PS00264; NEUROHYPOPHYS_HORM; 1.
PE   1: Evidence at protein level;
KW   Amidation; Direct protein sequencing; Disulfide bond; Hormone;
KW   Reference proteome; Secreted.
FT   PEPTIDE         1..9
FT                   /note="Cephalotocin"
FT                   /id="PRO_0000044096"
FT   MOD_RES         9
FT                   /note="Glycine amide"
FT                   /evidence="ECO:0000269|PubMed:1589145"
FT   DISULFID        1..6
SQ   SEQUENCE   9 AA;  1072 MW;  17FF476EB45409DB CRC64;
     CYFRNCPIG