3S1A3_NAJSP
ID 3S1A3_NAJSP Reviewed; 83 AA.
AC O57326;
DT 13-APR-2004, integrated into UniProtKB/Swiss-Prot.
DT 01-JUN-1998, sequence version 1.
DT 25-MAY-2022, entry version 78.
DE RecName: Full=Alpha-neurotoxin NTX-3;
DE Short=NTX3;
DE Flags: Precursor;
OS Naja sputatrix (Malayan spitting cobra) (Naja naja sputatrix).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC Lepidosauria; Squamata; Bifurcata; Unidentata; Episquamata; Toxicofera;
OC Serpentes; Colubroidea; Elapidae; Elapinae; Naja.
OX NCBI_TaxID=33626;
RN [1]
RP NUCLEOTIDE SEQUENCE [MRNA].
RC TISSUE=Venom gland;
RA Affifian F., Armugam A., Gopalakrishnakone P., Tan N.H., Tan C.H.,
RA Jeyaseelan K.;
RL Submitted (SEP-1997) to the EMBL/GenBank/DDBJ databases.
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; AF023271; AAC69915.1; -; mRNA.
DR AlphaFoldDB; O57326; -.
DR SMR; O57326; -.
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:0000250"
FT CHAIN 22..83
FT /note="Alpha-neurotoxin NTX-3"
FT /id="PRO_0000035459"
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; 9289 MW; F9CAD6B18907AF75 CRC64;
MKTLLLTLLV VTIVCLDLGY TLECHNQQSS ETPTTTGCSG GETNCYKKRW RDHRGYRIER
GCGCPSVKKG IEINCCTTDR CNN