ID   TXV1_PHONI              Reviewed;           8 AA.
AC   Q7M3P1;
DT   24-MAY-2004, integrated into UniProtKB/Swiss-Prot.
DT   15-DEC-2003, sequence version 1.
DT   26-FEB-2020, entry version 32.
DE   RecName: Full=U28-ctenitoxin-Pn1a;
DE            Short=U28-CNTX-Pn1a;
DE   AltName: Full=Spasmogenic toxin PnV1;
DE   Flags: Fragment;
OS   Phoneutria nigriventer (Brazilian armed spider) (Ctenus nigriventer).
OC   Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Chelicerata; Arachnida; Araneae;
OC   Araneomorphae; Entelegynae; Lycosoidea; Ctenidae; Phoneutria.
OX   NCBI_TaxID=6918;
RN   [1]
RP   PROTEIN SEQUENCE.
RC   TISSUE=Venom;
RX   PubMed=8503129; DOI=10.1016/0041-0101(93)90173-g;
RA   Marangoni S., Borges N.C.C., Marangoni R.A., Antunes E., Vieira C.A.,
RA   Novello J.C., Domont G.B., Giglio J.R., Oliveira B., de Nucci G.;
RT   "Biochemical characterization of a vascular smooth muscle contracting
RT   polypeptide purified from Phoneutria nigriventer (armed spider) venom.";
RL   Toxicon 31:377-384(1993).
CC   -!- FUNCTION: Has a vascular smooth muscle spasmogenic activity.
CC   -!- SUBCELLULAR LOCATION: Secreted.
CC   -!- TISSUE SPECIFICITY: Expressed by the venom gland.
CC   -!- PTM: Contains 2 disulfide bonds.
CC   -!- MISCELLANEOUS: The peptide is constituted by 125 AA.
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DR   PIR; A46306; A46306.
DR   ArachnoServer; AS000420; U28-ctenitoxin-Pn1a.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR   GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
PE   1: Evidence at protein level;
KW   Direct protein sequencing; Disulfide bond; Secreted; Toxin.
FT   CHAIN           1..>8
FT                   /note="U28-ctenitoxin-Pn1a"
FT                   /id="PRO_0000087645"
FT   NON_TER         8
SQ   SEQUENCE   8 AA;  836 MW;  30B5A6D86769CDDB CRC64;
     EAFPGQST