ID   TX13_ANDCR              Reviewed;          80 AA.
AC   P0C294;
DT   09-JAN-2007, integrated into UniProtKB/Swiss-Prot.
DT   09-JAN-2007, sequence version 1.
DT   25-MAY-2022, entry version 39.
DE   RecName: Full=Toxin Acra I-3;
DE   Flags: Precursor;
OS   Androctonus crassicauda (Arabian fat-tailed scorpion).
OC   Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Chelicerata; Arachnida;
OC   Scorpiones; Buthida; Buthoidea; Buthidae; Androctonus.
OX   NCBI_TaxID=122909;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   TISSUE=Venom gland;
RX   PubMed=16762386; DOI=10.1016/j.toxicon.2006.04.003;
RA   Caliskan F., Garcia B.I., Coronas F.I.V., Batista C.V.F., Zamudio F.Z.,
RA   Possani L.D.;
RT   "Characterization of venom components from the scorpion Androctonus
RT   crassicauda of Turkey: peptides and genes.";
RL   Toxicon 48:12-22(2006).
CC   -!- FUNCTION: Probable neurotoxin that inhibits ion channels (By
CC       similarity). Is toxic to mice. {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 (3 C-C) scorpion toxin superfamily.
CC       Sodium/Potassium channel inhibitor family. {ECO:0000305}.
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DR   AlphaFoldDB; P0C294; -.
DR   SMR; P0C294; -.
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.
FT   SIGNAL          1..22
FT                   /evidence="ECO:0000250"
FT   CHAIN           23..80
FT                   /note="Toxin Acra I-3"
FT                   /id="PRO_0000271321"
FT   DOMAIN          25..80
FT                   /note="LCN-type CS-alpha/beta"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
FT   DISULFID        40..63
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
FT   DISULFID        49..68
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
FT   DISULFID        53..70
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
SQ   SEQUENCE   80 AA;  8853 MW;  DB2128A72A8AD42B CRC64;
     MMKLVLLSVI VILFSLIGSI HGANVPGNYP LDSSGNKYPC TVLGDNQSCI DVCKKHGVKY
     GYCYGFKCWC EYLKDKNVSL