SNAA3_LYCMC
ID SNAA3_LYCMC Reviewed; 83 AA.
AC D9U298;
DT 11-JAN-2011, integrated into UniProtKB/Swiss-Prot.
DT 05-OCT-2010, sequence version 1.
DT 03-AUG-2022, entry version 27.
DE RecName: Full=Neurotoxin LmNaTx3;
DE Flags: Precursor;
OS Lychas mucronatus (Chinese swimming scorpion).
OC Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Chelicerata; Arachnida;
OC Scorpiones; Buthida; Buthoidea; Buthidae; Lychas.
OX NCBI_TaxID=172552;
RN [1]
RP NUCLEOTIDE SEQUENCE [MRNA].
RC STRAIN=Hainan; TISSUE=Venom gland;
RX PubMed=20663230; DOI=10.1186/1471-2164-11-452;
RA Zhao R., Ma Y., He Y., Di Z., Wu Y.-L., Cao Z.-J., Li W.-X.;
RT "Comparative venom gland transcriptome analysis of the scorpion Lychas
RT mucronatus reveals intraspecific toxic gene diversity and new venomous
RT components.";
RL BMC Genomics 11:452-452(2010).
CC -!- FUNCTION: Binds voltage-independently at site-3 of voltage-gated sodium
CC channels (Nav) and inhibits the inactivation of the activated channels,
CC thereby blocking neuronal transmission. {ECO:0000250}.
CC -!- SUBCELLULAR LOCATION: Secreted {ECO:0000250}.
CC -!- TISSUE SPECIFICITY: Expressed by the venom gland.
CC -!- DOMAIN: Has the structural arrangement of an alpha-helix connected to
CC antiparallel beta-sheets by disulfide bonds (CS-alpha/beta).
CC {ECO:0000305}.
CC -!- SIMILARITY: Belongs to the long (4 C-C) scorpion toxin superfamily.
CC Sodium channel inhibitor family. Alpha subfamily. {ECO:0000305}.
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DR EMBL; EU159278; ABX76751.1; -; mRNA.
DR AlphaFoldDB; D9U298; -.
DR SMR; D9U298; -.
DR GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR GO; GO:0019871; F:sodium channel inhibitor activity; IEA:InterPro.
DR GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
DR GO; GO:0006952; P:defense response; IEA:InterPro.
DR Gene3D; 3.30.30.10; -; 1.
DR InterPro; IPR044062; LCN-type_CS_alpha_beta_dom.
DR InterPro; IPR003614; Scorpion_toxin-like.
DR InterPro; IPR036574; Scorpion_toxin-like_sf.
DR InterPro; IPR018218; Scorpion_toxinL.
DR InterPro; IPR002061; Scorpion_toxinL/defensin.
DR Pfam; PF00537; Toxin_3; 1.
DR PRINTS; PR00285; SCORPNTOXIN.
DR SMART; SM00505; Knot1; 1.
DR SUPFAM; SSF57095; SSF57095; 1.
DR PROSITE; PS51863; LCN_CSAB; 1.
PE 2: Evidence at transcript level;
KW Disulfide bond; Ion channel impairing toxin; Neurotoxin; Secreted; Signal;
KW Toxin; Voltage-gated sodium channel impairing toxin.
FT SIGNAL 1..21
FT /evidence="ECO:0000255"
FT CHAIN 22..83
FT /note="Neurotoxin LmNaTx3"
FT /id="PRO_0000403814"
FT DOMAIN 22..83
FT /note="LCN-type CS-alpha/beta"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
FT DISULFID 32..83
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
FT DISULFID 36..59
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
FT DISULFID 45..64
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
FT DISULFID 49..66
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU01210"
SQ SEQUENCE 83 AA; 9488 MW; 2FE5726A22B42B40 CRC64;
MQLKIQLLML VLMIVLTDVY SKDGFIVSKK NCLYRCSQSD ERGFCNAVCL RYDADSGYCR
TGKCWCDGLP QKANIAMKNK NYC