SCX21_TITDI
ID SCX21_TITDI Reviewed; 26 AA.
AC P60260;
DT 16-JAN-2004, integrated into UniProtKB/Swiss-Prot.
DT 16-JAN-2004, sequence version 1.
DT 25-MAY-2022, entry version 35.
DE RecName: Full=Toxin TdII-1;
DE Flags: Fragment;
OS Tityus discrepans (Venezuelan scorpion).
OC Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Chelicerata; Arachnida;
OC Scorpiones; Buthida; Buthoidea; Buthidae; Tityus.
OX NCBI_TaxID=57059;
RN [1]
RP PROTEIN SEQUENCE.
RC TISSUE=Venom;
RX PubMed=8783453; DOI=10.1016/0041-0101(95)00156-5;
RA D'Suze G., Corona F., Possani L.D., Sevcik C.;
RT "High performance liquid chromatography purification and amino acid
RT sequence of toxins from the muscarinic fraction of Tityus discrepans
RT scorpion venom.";
RL Toxicon 34:591-598(1996).
CC -!- FUNCTION: Beta toxins bind voltage-independently at site-4 of sodium
CC channels (Nav) and shift the voltage of activation toward more negative
CC potentials thereby affecting sodium channel activation and promoting
CC spontaneous and repetitive firing (By similarity). This toxin is active
CC against mammals and crustaceans. {ECO:0000250}.
CC -!- SUBCELLULAR LOCATION: Secreted.
CC -!- TISSUE SPECIFICITY: Expressed by the venom gland.
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 AlphaFoldDB; P60260; -.
DR GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR GO; GO:0017080; F:sodium channel regulator activity; IEA:UniProtKB-KW.
DR GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
PE 1: Evidence at protein level;
KW Direct protein sequencing; Ion channel impairing toxin; Neurotoxin;
KW Secreted; Toxin; Voltage-gated sodium channel impairing toxin.
FT CHAIN 1..>26
FT /note="Toxin TdII-1"
FT /id="PRO_0000066820"
FT NON_TER 26
SQ SEQUENCE 26 AA; 2803 MW; E45AC1AFA515A1EA CRC64;
KDGYLMGADG CKLCVLTAPY DYCACE