ID   ICK21_TRILK             Reviewed;          79 AA.
AC   W4VRU9;
DT   14-MAY-2014, integrated into UniProtKB/Swiss-Prot.
DT   19-MAR-2014, sequence version 1.
DT   25-MAY-2022, entry version 15.
DE   RecName: Full=Toxin ICK-21;
DE   Flags: Precursor;
OS   Trittame loki (Brush-footed trapdoor spider).
OC   Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Chelicerata; Arachnida; Araneae;
OC   Mygalomorphae; Barychelidae; Trittame.
OX   NCBI_TaxID=1295018;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   TISSUE=Venom gland;
RX   PubMed=24351713; DOI=10.3390/toxins5122488;
RA   Undheim E.A., Sunagar K., Herzig V., Kely L., Low D.H., Jackson T.N.,
RA   Jones A., Kurniawan N., King G.F., Ali S.A., Antunes A., Ruder T.,
RA   Fry B.G.;
RT   "A proteomics and transcriptomics investigation of the venom from the
RT   barychelid spider Trittame loki (brush-foot trapdoor).";
RL   Toxins 5:2488-2503(2013).
CC   -!- FUNCTION: Ion channel inhibitor. {ECO:0000305}.
CC   -!- SUBCELLULAR LOCATION: Secreted {ECO:0000250}.
CC   -!- TISSUE SPECIFICITY: Expressed by the venom gland.
CC   -!- DOMAIN: The presence of a 'disulfide through disulfide knot'
CC       structurally defines this protein as a knottin. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the neurotoxin 13 (insecticidal toxin ABC)
CC       family. ICK-21 subfamily.
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DR   EMBL; GAQE01000024; JAB84530.1; -; Transcribed_RNA.
DR   AlphaFoldDB; W4VRU9; -.
DR   SMR; W4VRU9; -.
DR   ArachnoServer; AS001647; U14-barytoxin-Tl1b.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR   GO; GO:0099106; F:ion channel regulator activity; IEA:UniProtKB-KW.
DR   GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
PE   2: Evidence at transcript level;
KW   Disulfide bond; Glycoprotein; Ion channel impairing toxin; Knottin;
KW   Secreted; Signal; Toxin.
FT   SIGNAL          1..20
FT                   /evidence="ECO:0000255"
FT   CHAIN           21..79
FT                   /note="Toxin ICK-21"
FT                   /id="PRO_0000429228"
FT   CARBOHYD        71
FT                   /note="N-linked (GlcNAc...) asparagine"
FT                   /evidence="ECO:0000255"
FT   DISULFID        43..57
FT                   /evidence="ECO:0000250"
FT   DISULFID        50..61
FT                   /evidence="ECO:0000250"
FT   DISULFID        56..78
FT                   /evidence="ECO:0000250"
FT   DISULFID        68..74
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   79 AA;  8738 MW;  5ECF4C68C3711981 CRC64;
     MMKYFLVLCL VVLAVAAVQA AGLEEEKFLN LGESLAMPEE SRCKARRYGC TDKAECCSEK
     CAYPALTCVF NWSCEKVCA