3S13_OXYMI
ID 3S13_OXYMI Reviewed; 83 AA.
AC A7X4R5;
DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT 23-OCT-2007, sequence version 1.
DT 25-MAY-2022, entry version 51.
DE RecName: Full=Short neurotoxin 3FTx-Oxy3;
DE Flags: Precursor;
OS Oxyuranus microlepidotus (Inland taipan) (Diemenia microlepidota).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC Lepidosauria; Squamata; Bifurcata; Unidentata; Episquamata; Toxicofera;
OC Serpentes; Colubroidea; Elapidae; Acanthophiinae; Oxyuranus.
OX NCBI_TaxID=111177;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
RC TISSUE=Venom gland;
RX PubMed=17855442; DOI=10.1074/mcp.m700094-mcp200;
RA Fry B.G., Scheib H., van der Weerd L., Young B., McNaughtan J.,
RA Ramjan S.F.R., Vidal N., Poelmann R.E., Norman J.A.;
RT "Evolution of an arsenal: structural and functional diversification of the
RT venom system in the advanced snakes (Caenophidia).";
RL Mol. Cell. Proteomics 7:215-246(2008).
CC -!- FUNCTION: Binds to muscle nicotinic acetylcholine receptor (nAChR) and
CC inhibit acetylcholine from binding to the receptor, thereby impairing
CC neuromuscular transmission. {ECO:0000250|UniProtKB:P60775}.
CC -!- SUBCELLULAR LOCATION: Secreted {ECO:0000250}.
CC -!- TISSUE SPECIFICITY: Expressed by the venom gland. {ECO:0000305}.
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 EMBL; EU029751; ABU68551.1; -; mRNA.
DR AlphaFoldDB; A7X4R5; -.
DR SMR; A7X4R5; -.
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 3: Inferred from homology;
KW Acetylcholine receptor inhibiting toxin; Disulfide bond;
KW Ion channel impairing toxin; Neurotoxin; Postsynaptic neurotoxin; Secreted;
KW Signal; Toxin.
FT SIGNAL 1..21
FT /evidence="ECO:0000255"
FT CHAIN 22..83
FT /note="Short neurotoxin 3FTx-Oxy3"
FT /id="PRO_0000316174"
FT DISULFID 24..45
FT /evidence="ECO:0000250|UniProtKB:P0C1Z0"
FT DISULFID 38..62
FT /evidence="ECO:0000250|UniProtKB:P0C1Z0"
FT DISULFID 64..75
FT /evidence="ECO:0000250|UniProtKB:P0C1Z0"
FT DISULFID 76..81
FT /evidence="ECO:0000250|UniProtKB:P0C1Z0"
SQ SEQUENCE 83 AA; 9009 MW; 0A2DADE7AC43EA57 CRC64;
MKTLLLTLVV VTIVCLDLGY TMTCYNQQSS QAKTTTTCSG GVSSCYRKTW SDIRGTIIER
GCGCPSVKKG IERICCGTDK CNN