ID   SCX8_TITPA              Reviewed;         101 AA.
AC   H1ZZI9;
DT   01-MAY-2013, integrated into UniProtKB/Swiss-Prot.
DT   21-MAR-2012, sequence version 1.
DT   25-MAY-2022, entry version 24.
DE   RecName: Full=Toxin Tpa8;
DE   AltName: Full=T NaTx9.1;
DE   Flags: Precursor;
OS   Tityus pachyurus (Colombian scorpion).
OC   Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Chelicerata; Arachnida;
OC   Scorpiones; Buthida; Buthoidea; Buthidae; Tityus.
OX   NCBI_TaxID=288781;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA], AND NOMENCLATURE.
RC   TISSUE=Venom gland;
RX   PubMed=22355312; DOI=10.1371/journal.pone.0030478;
RA   Guerrero-Vargas J.A., Mourao C.B., Quintero-Hernandez V., Possani L.D.,
RA   Schwartz E.F.;
RT   "Identification and phylogenetic analysis of Tityus pachyurus and Tityus
RT   obscurus novel putative Na+-channel scorpion toxins.";
RL   PLoS ONE 7:E30478-E30478(2012).
CC   -!- FUNCTION: Excitatory insect beta-toxins induce a spastic paralysis.
CC       They bind voltage-independently at site-4 of sodium channels (Nav) and
CC       shift the voltage of activation toward more negative potentials thereby
CC       affecting sodium channel activation and promoting spontaneous and
CC       repetitive firing (By similarity). {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Secreted {ECO:0000250}.
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. Beta subfamily. {ECO:0000305}.
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DR   EMBL; HE585243; CCD31437.1; -; mRNA.
DR   AlphaFoldDB; H1ZZI9; -.
DR   SMR; H1ZZI9; -.
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   Gene3D; 3.30.30.10; -; 1.
DR   InterPro; IPR044062; LCN-type_CS_alpha_beta_dom.
DR   InterPro; IPR036574; Scorpion_toxin-like_sf.
DR   InterPro; IPR002061; Scorpion_toxinL/defensin.
DR   Pfam; PF00537; Toxin_3; 1.
DR   SUPFAM; SSF57095; SSF57095; 1.
DR   PROSITE; PS51863; LCN_CSAB; 1.
PE   2: Evidence at transcript level;
KW   Disulfide bond; Ion channel impairing toxin; Neurotoxin; Secreted; Signal;
KW   Toxin; Voltage-gated sodium channel impairing toxin.
FT   SIGNAL          1..20
FT                   /evidence="ECO:0000255"
FT   CHAIN           21..101
FT                   /note="Toxin Tpa8"
FT                   /id="PRO_5000851452"
FT   DOMAIN          24..98
FT                   /note="LCN-type CS-alpha/beta"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
FT   DISULFID        44..70
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
FT   DISULFID        56..75
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
FT   DISULFID        60..77
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
FT   DISULFID        71..97
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
SQ   SEQUENCE   101 AA;  10960 MW;  7D3B69D8D93656D0 CRC64;
     MVKSEMKLVI FSLFLLLIGV ESLKNGYPVI EGGGSPDYGE SAECGSEDSN SADNFCNDIC
     TNVGGKSGDC CLGSCFCFDL PDEQKTVEVM DRTKEYCEFV E