ID   TXC16_CUPSA             Reviewed;          38 AA.
AC   B3EWS9;
DT   06-FEB-2013, integrated into UniProtKB/Swiss-Prot.
DT   06-FEB-2013, sequence version 1.
DT   25-MAY-2022, entry version 13.
DE   RecName: Full=Toxin CSTX-16 {ECO:0000303|PubMed:22672445};
DE   Contains:
DE     RecName: Full=CSTX-16 A chain {ECO:0000303|PubMed:22672445};
DE   Contains:
DE     RecName: Full=CSTX-16 B chain {ECO:0000303|PubMed:22672445};
DE   Flags: Precursor; Fragments;
OS   Cupiennius salei (American wandering spider).
OC   Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Chelicerata; Arachnida; Araneae;
OC   Araneomorphae; Entelegynae; Lycosoidea; Ctenidae; Cupiennius.
OX   NCBI_TaxID=6928;
RN   [1]
RP   PROTEIN SEQUENCE, MASS SPECTROMETRY, AND AMIDATION AT GLN-19 AND GLN-38.
RC   TISSUE=Venom;
RX   PubMed=22672445; DOI=10.1111/j.1742-4658.2012.08650.x;
RA   Trachsel C., Siegemund D., Kampfer U., Kopp L.S., Buhr C., Grossmann J.,
RA   Luthi C., Cunningham M., Nentwig W., Kuhn-Nentwig L., Schurch S.,
RA   Schaller J.;
RT   "Multicomponent venom of the spider Cupiennius salei: a bioanalytical
RT   investigation applying different strategies.";
RL   FEBS J. 279:2683-2694(2012).
CC   -!- SUBCELLULAR LOCATION: Secreted {ECO:0000269|PubMed:22672445}.
CC   -!- TISSUE SPECIFICITY: Expressed by the venom gland.
CC       {ECO:0000305|PubMed:22672445}.
CC   -!- MASS SPECTROMETRY: [CSTX-16 A chain]: Mass=2370.371;
CC       Method=Electrospray; Evidence={ECO:0000269|PubMed:22672445};
CC   -!- MASS SPECTROMETRY: [CSTX-16 B chain]: Mass=2504.347;
CC       Method=Electrospray; Evidence={ECO:0000269|PubMed:22672445};
CC   -!- SIMILARITY: Belongs to the cationic peptide 04 (cupiennin) family. 10
CC       (double chain) subfamily.
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DR   AlphaFoldDB; B3EWS9; -.
DR   SMR; B3EWS9; -.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR   GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
PE   1: Evidence at protein level;
KW   Amidation; Direct protein sequencing; Secreted; Toxin.
FT   PEPTIDE         1..19
FT                   /note="CSTX-16 A chain"
FT                   /evidence="ECO:0000269|PubMed:22672445"
FT                   /id="PRO_0000421187"
FT   PEPTIDE         20..38
FT                   /note="CSTX-16 B chain"
FT                   /evidence="ECO:0000269|PubMed:22672445"
FT                   /id="PRO_0000421188"
FT   MOD_RES         19
FT                   /note="Glutamine amide"
FT                   /evidence="ECO:0000269|PubMed:22672445"
FT   MOD_RES         38
FT                   /note="Glutamine amide"
FT                   /evidence="ECO:0000269|PubMed:22672445"
FT   NON_CONS        19..20
FT                   /evidence="ECO:0000303|PubMed:22672445"
SQ   SEQUENCE   38 AA;  4748 MW;  B9EF8877B3B095E8 CRC64;
     NFLEMLKENC KLLWKRQKQK FRIPMPESLC QILKKKKQ