ID   CT21_CONTE              Reviewed;          61 AA.
AC   Q9BH21;
DT   23-JAN-2007, integrated into UniProtKB/Swiss-Prot.
DT   01-JUN-2001, sequence version 1.
DT   25-MAY-2022, entry version 45.
DE   RecName: Full=Conotoxin Tx-D021 {ECO:0000312|EMBL:AAG60517.1};
DE   AltName: Full=Tx-D022 {ECO:0000312|EMBL:AAG60391.1};
DE   Flags: Precursor;
OS   Conus textile (Cloth-of-gold cone).
OC   Eukaryota; Metazoa; Spiralia; Lophotrochozoa; Mollusca; Gastropoda;
OC   Caenogastropoda; Neogastropoda; Conoidea; Conidae; Conus; Cylinder.
OX   NCBI_TaxID=6494;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   TISSUE=Venom duct;
RX   PubMed=11158371; DOI=10.1093/oxfordjournals.molbev.a003786;
RA   Conticello S.G., Gilad Y., Avidan N., Ben-Asher E., Levy Z., Fainzilber M.;
RT   "Mechanisms for evolving hypervariability: the case of conopeptides.";
RL   Mol. Biol. Evol. 18:120-131(2001).
CC   -!- SUBCELLULAR LOCATION: Secreted {ECO:0000305|PubMed:11158371}.
CC   -!- TISSUE SPECIFICITY: Expressed by the venom duct.
CC       {ECO:0000305|PubMed:11158371}.
CC   -!- DOMAIN: The cysteine framework is V (CC-CC). {ECO:0000305}.
CC   -!- PTM: Contains 2 disulfide bonds that can be either 'C1-C3, C2-C4' or
CC       'C1-C4, C2-C3', since these disulfide connectivities have been observed
CC       for conotoxins with cysteine framework V (for examples, see AC P0DQQ7
CC       and AC P81755). {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the conotoxin T superfamily. {ECO:0000305}.
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DR   EMBL; AF215096; AAG60517.1; -; mRNA.
DR   EMBL; AF214963; AAG60391.1; -; mRNA.
DR   AlphaFoldDB; Q9BH21; -.
DR   ConoServer; 650; Tx-D021 precursor.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR   GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
DR   InterPro; IPR031565; T-conotoxin.
DR   Pfam; PF16981; Chi-conotoxin; 1.
PE   3: Inferred from homology;
KW   Amidation; Cleavage on pair of basic residues; Disulfide bond; Secreted;
KW   Signal; Toxin.
FT   SIGNAL          1..22
FT                   /evidence="ECO:0000255"
FT   PROPEP          23..48
FT                   /evidence="ECO:0000250"
FT                   /id="PRO_0000274088"
FT   PEPTIDE         50..60
FT                   /note="Conotoxin Tx-D021"
FT                   /id="PRO_0000274089"
FT   MOD_RES         60
FT                   /note="Cysteine amide"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   61 AA;  6697 MW;  FBCAA26F92EE8900 CRC64;
     MRCLPVFVIL LLLIASTPSV DARAKTRDDM SLASFHDDAK RILQILQDRS GCCVIDSNCC
     G