ID   3S12_OXYSC              Reviewed;          62 AA.
AC   P0CB06;
DT   28-JUL-2009, integrated into UniProtKB/Swiss-Prot.
DT   28-JUL-2009, sequence version 1.
DT   25-MAY-2022, entry version 36.
DE   RecName: Full=Short neurotoxin 2;
DE            Short=SNTX-2;
OS   Oxyuranus scutellatus scutellatus (Australian taipan) (Coastal taipan).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC   Lepidosauria; Squamata; Bifurcata; Unidentata; Episquamata; Toxicofera;
OC   Serpentes; Colubroidea; Elapidae; Acanthophiinae; Oxyuranus.
OX   NCBI_TaxID=8667;
RN   [1]
RP   PROTEIN SEQUENCE, FUNCTION, MASS SPECTROMETRY, TOXIC DOSE, AND SUBCELLULAR
RP   LOCATION.
RC   TISSUE=Venom;
RX   PubMed=8672493; DOI=10.1021/bi9600761;
RA   Zamudio F., Wolf K.M., Martin B.M., Possani L.D., Chiappinelli V.A.;
RT   "Two novel alpha-neurotoxins isolated from the taipan snake, Oxyuranus
RT   scutellatus, exhibit reduced affinity for nicotinic acetylcholine receptors
RT   in brain and skeletal muscle.";
RL   Biochemistry 35:7910-7916(1996).
CC   -!- FUNCTION: Binds to muscle nicotinic acetylcholine receptor (nAChR) and
CC       inhibit acetylcholine from binding to the receptor, thereby impairing
CC       neuromuscular transmission. {ECO:0000269|PubMed:8672493}.
CC   -!- SUBCELLULAR LOCATION: Secreted {ECO:0000269|PubMed:8672493}.
CC   -!- TISSUE SPECIFICITY: Expressed by the venom gland. {ECO:0000305}.
CC   -!- MASS SPECTROMETRY: Mass=6781; Method=Electrospray;
CC       Evidence={ECO:0000269|PubMed:8672493};
CC   -!- TOXIC DOSE: LD(50) is 63 ug/kg by intraperitoneal injection into mice.
CC       {ECO:0000269|PubMed:8672493}.
CC   -!- SIMILARITY: Belongs to the snake three-finger toxin family. Short-chain
CC       subfamily. Type I alpha-neurotoxin sub-subfamily. {ECO:0000305}.
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DR   AlphaFoldDB; P0CB06; -.
DR   SMR; P0CB06; -.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR   GO; GO:0030550; F:acetylcholine receptor inhibitor activity; IEA:UniProtKB-KW.
DR   GO; GO:0099106; F:ion channel regulator activity; IEA:UniProtKB-KW.
DR   GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
DR   CDD; cd00206; snake_toxin; 1.
DR   Gene3D; 2.10.60.10; -; 1.
DR   InterPro; IPR003571; Snake_3FTx.
DR   InterPro; IPR045860; Snake_toxin-like_sf.
DR   InterPro; IPR018354; Snake_toxin_con_site.
DR   SUPFAM; SSF57302; SSF57302; 1.
DR   PROSITE; PS00272; SNAKE_TOXIN; 1.
PE   1: Evidence at protein level;
KW   Acetylcholine receptor inhibiting toxin; Direct protein sequencing;
KW   Disulfide bond; Ion channel impairing toxin; Neurotoxin;
KW   Postsynaptic neurotoxin; Secreted; Toxin.
FT   CHAIN           1..62
FT                   /note="Short neurotoxin 2"
FT                   /evidence="ECO:0000269|PubMed:8672493"
FT                   /id="PRO_0000380613"
FT   REGION          1..20
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   DISULFID        3..24
FT                   /evidence="ECO:0000250|UniProtKB:P0C1Z0"
FT   DISULFID        17..41
FT                   /evidence="ECO:0000250|UniProtKB:P0C1Z0"
FT   DISULFID        43..54
FT                   /evidence="ECO:0000250|UniProtKB:P0C1Z0"
FT   DISULFID        55..60
FT                   /evidence="ECO:0000250|UniProtKB:P0C1Z0"
SQ   SEQUENCE   62 AA;  6790 MW;  8476EBD88A18E319 CRC64;
     MTCYNQQSSE AKTTTTCSGG VSSCYKKTWS DIRGTIIERG CGCPSVKKGI ERICCRTDKC
     NN