ID   SCXI_BUTOM              Reviewed;          66 AA.
AC   P59896;
DT   03-OCT-2003, integrated into UniProtKB/Swiss-Prot.
DT   03-OCT-2003, sequence version 1.
DT   03-AUG-2022, entry version 60.
DE   RecName: Full=Toxin BomPI;
DE   AltName: Full=Neurotoxin PI;
OS   Buthus occitanus mardochei (Moroccan scorpion) (Buthus mardochei).
OC   Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Chelicerata; Arachnida;
OC   Scorpiones; Buthida; Buthoidea; Buthidae; Buthus.
OX   NCBI_TaxID=6869;
RN   [1]
RP   PROTEIN SEQUENCE.
RA   Martin M.-F., Vargas O., Rochat H.;
RT   "Importance of the C-terminal amino acid residues on scorpion toxins
RT   activity.";
RL   (In) Aubry A., Marraud M., Vitoux B. (eds.);
RL   Second Forum on Peptide, pp.174:483-486, Colloque INSERM/John Libbey
RL   Eurotext Ltd., London (1989).
RN   [2]
RP   CHARACTERIZATION.
RX   PubMed=3104036; DOI=10.1111/j.1432-1033.1987.tb10680.x;
RA   Vargas O., Martin M.-F., Rochat H.;
RT   "Characterization of six toxins from the venom of the Moroccan scorpion
RT   Buthus occitanus mardochei.";
RL   Eur. J. Biochem. 162:589-599(1987).
CC   -!- FUNCTION: Alpha toxins bind voltage-independently at site-3 of sodium
CC       channels (Nav) and inhibit the inactivation of the activated channels,
CC       thereby blocking neuronal transmission. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Secreted.
CC   -!- TISSUE SPECIFICITY: Expressed by the venom gland.
CC   -!- DOMAIN: Has the structural arrangement of an alpha-helix connected to
CC       antiparallel beta-sheets by disulfide bonds (CS-alpha/beta).
CC       {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the long (4 C-C) scorpion toxin superfamily.
CC       Sodium channel inhibitor family. Alpha subfamily. {ECO:0000305}.
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DR   AlphaFoldDB; P59896; -.
DR   SMR; P59896; -.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR   GO; GO:0019871; F:sodium channel inhibitor activity; IEA:InterPro.
DR   GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
DR   GO; GO:0006952; P:defense response; IEA:InterPro.
DR   CDD; cd00107; Knot1; 1.
DR   Gene3D; 3.30.30.10; -; 1.
DR   InterPro; IPR044062; LCN-type_CS_alpha_beta_dom.
DR   InterPro; IPR003614; Scorpion_toxin-like.
DR   InterPro; IPR036574; Scorpion_toxin-like_sf.
DR   InterPro; IPR018218; Scorpion_toxinL.
DR   InterPro; IPR002061; Scorpion_toxinL/defensin.
DR   Pfam; PF00537; Toxin_3; 1.
DR   PRINTS; PR00285; SCORPNTOXIN.
DR   SMART; SM00505; Knot1; 1.
DR   SUPFAM; SSF57095; SSF57095; 1.
DR   PROSITE; PS51863; LCN_CSAB; 1.
PE   1: Evidence at protein level;
KW   Direct protein sequencing; Disulfide bond; Ion channel impairing toxin;
KW   Neurotoxin; Secreted; Toxin; Voltage-gated sodium channel impairing toxin.
FT   CHAIN           1..66
FT                   /note="Toxin BomPI"
FT                   /id="PRO_0000066746"
FT   DOMAIN          2..64
FT                   /note="LCN-type CS-alpha/beta"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
FT   DISULFID        12..63
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
FT   DISULFID        16..36
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
FT   DISULFID        22..46
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
FT   DISULFID        26..48
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
SQ   SEQUENCE   66 AA;  7398 MW;  76D9B51836B27620 CRC64;
     GRDAYIAQPE NCVYECAKSS YCNDLCTKNG AKSGYCQWLG RWGNACYCID LPDKVPIRIE
     GKCHFA