ID   3SOIK_BUNFA             Reviewed;          78 AA.
AC   P0C552;
DT   10-JUL-2007, integrated into UniProtKB/Swiss-Prot.
DT   10-JUL-2007, sequence version 1.
DT   25-MAY-2022, entry version 43.
DE   RecName: Full=Neurotoxin 3FTx-LK;
DE   Flags: Precursor;
OS   Bungarus fasciatus (Banded krait) (Pseudoboa fasciata).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC   Lepidosauria; Squamata; Bifurcata; Unidentata; Episquamata; Toxicofera;
OC   Serpentes; Colubroidea; Elapidae; Bungarinae; Bungarus.
OX   NCBI_TaxID=8613;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA], PROTEIN SEQUENCE OF 22-34, AND MASS
RP   SPECTROMETRY.
RC   TISSUE=Venom, and Venom gland;
RX   PubMed=17166178; DOI=10.1111/j.1742-4658.2006.05598.x;
RA   Tsai I.-H., Tsai H.-Y., Saha A., Gomes A.;
RT   "Sequences, geographic variations and molecular phylogeny of venom
RT   phospholipases and three-finger toxins of eastern India Bungarus fasciatus
RT   and kinetic analyses of its Pro31 phospholipases A2.";
RL   FEBS J. 274:512-525(2007).
CC   -!- FUNCTION: Blocks both the muscle-twitch response to nerve stimulation
CC       and the response to exogenous acetylcholine. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Secreted.
CC   -!- TISSUE SPECIFICITY: Expressed by the venom gland.
CC   -!- MASS SPECTROMETRY: Mass=6401; Mass_error=1; Method=Electrospray;
CC       Evidence={ECO:0000269|PubMed:17166178};
CC   -!- SIMILARITY: Belongs to the snake three-finger toxin family. Short-chain
CC       subfamily. Orphan group XVIII sub-subfamily. {ECO:0000305}.
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DR   EMBL; DQ508407; -; NOT_ANNOTATED_CDS; mRNA.
DR   AlphaFoldDB; P0C552; -.
DR   SMR; P0C552; -.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR   GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
DR   Gene3D; 2.10.60.10; -; 1.
DR   InterPro; IPR045860; Snake_toxin-like_sf.
DR   SUPFAM; SSF57302; SSF57302; 1.
PE   1: Evidence at protein level;
KW   Direct protein sequencing; Disulfide bond; Neurotoxin;
KW   Postsynaptic neurotoxin; Secreted; Signal; Toxin.
FT   SIGNAL          1..21
FT                   /evidence="ECO:0000269|PubMed:17166178"
FT   CHAIN           22..78
FT                   /note="Neurotoxin 3FTx-LK"
FT                   /evidence="ECO:0000305|PubMed:17166178"
FT                   /id="PRO_0000293104"
FT   DISULFID        24..42
FT                   /evidence="ECO:0000250|UniProtKB:P60301"
FT   DISULFID        35..60
FT                   /evidence="ECO:0000250|UniProtKB:P60301"
FT   DISULFID        64..70
FT                   /evidence="ECO:0000250|UniProtKB:P60301"
FT   DISULFID        71..76
FT                   /evidence="ECO:0000250|UniProtKB:P60301"
SQ   SEQUENCE   78 AA;  8699 MW;  C734E2A12EE87875 CRC64;
     MKTLLLTLVV VTIVCLDLGY TLKCHTTQFR NIETCQKWET VCFQRAVKPH PSSMIVLRGC
     TSSCGKGETC CATDLCNR