ID   CA121_CONBU             Reviewed;          36 AA.
AC   P0CY76;
DT   28-JUN-2011, integrated into UniProtKB/Swiss-Prot.
DT   28-JUN-2011, sequence version 1.
DT   25-MAY-2022, entry version 20.
DE   RecName: Full=Conotoxin Bu21;
DE   Flags: Precursor; Fragment;
OS   Conus bullatus (Bubble cone).
OC   Eukaryota; Metazoa; Spiralia; Lophotrochozoa; Mollusca; Gastropoda;
OC   Caenogastropoda; Neogastropoda; Conoidea; Conidae; Conus; Textilia.
OX   NCBI_TaxID=89438;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   TISSUE=Venom duct;
RX   PubMed=21266071; DOI=10.1186/1471-2164-12-60;
RA   Hu H., Bandyopadhyay P.K., Olivera B.M., Yandell M.;
RT   "Characterization of the Conus bullatus genome and its venom-duct
RT   transcriptome.";
RL   BMC Genomics 12:60-60(2011).
CC   -!- SUBCELLULAR LOCATION: Secreted {ECO:0000305}.
CC   -!- TISSUE SPECIFICITY: Expressed by the venom duct.
CC       {ECO:0000305|PubMed:21266071}.
CC   -!- DOMAIN: The cysteine framework is I (CC-C-C). Alpha4/5 pattern.
CC       {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the conotoxin A superfamily. {ECO:0000305}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   AlphaFoldDB; P0CY76; -.
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   Cleavage on pair of basic residues; Disulfide bond;
KW   Ion channel impairing toxin; Neurotoxin; Secreted; Toxin.
FT   PROPEP          <1..21
FT                   /id="PRO_0000409967"
FT   PEPTIDE         22..36
FT                   /note="Conotoxin Bu21"
FT                   /id="PRO_0000409968"
FT   DISULFID        22..28
FT                   /evidence="ECO:0000250|UniProtKB:P69657"
FT   DISULFID        23..34
FT                   /evidence="ECO:0000250|UniProtKB:P69657"
FT   NON_TER         1
SQ   SEQUENCE   36 AA;  4014 MW;  B144CC3A2274B065 CRC64;
     DGANAEATDN KPGVFERDEK KCCWNRACTR LVPCSK