ID   M33_CONMR               Reviewed;          68 AA.
AC   P0C1N2;
DT   11-JUL-2006, integrated into UniProtKB/Swiss-Prot.
DT   11-JUL-2006, sequence version 1.
DT   25-MAY-2022, entry version 31.
DE   RecName: Full=Conotoxin Mr3.3;
DE   Flags: Precursor;
OS   Conus marmoreus (Marble cone).
OC   Eukaryota; Metazoa; Spiralia; Lophotrochozoa; Mollusca; Gastropoda;
OC   Caenogastropoda; Neogastropoda; Conoidea; Conidae; Conus; Conus.
OX   NCBI_TaxID=42752;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   TISSUE=Venom duct;
RX   PubMed=15924437; DOI=10.1021/bi047541b;
RA   Corpuz G.P., Jacobsen R.B., Jimenez E.C., Watkins M., Walker C.,
RA   Colledge C., Garrett J.E., McDougal O., Li W., Gray W.R., Hillyard D.R.,
RA   Rivier J., McIntosh J.M., Cruz L.J., Olivera B.M.;
RT   "Definition of the M-conotoxin superfamily: characterization of novel
RT   peptides from molluscivorous Conus venoms.";
RL   Biochemistry 44:8176-8186(2005).
CC   -!- SUBCELLULAR LOCATION: Secreted {ECO:0000250}.
CC   -!- TISSUE SPECIFICITY: Expressed by the venom duct.
CC   -!- DOMAIN: The cysteine framework is III (CC-C-C-CC). Classified in the M-
CC       2 branch, since 2 residues stand between the fourth and the fifth
CC       cysteine residues.
CC   -!- SIMILARITY: Belongs to the conotoxin M superfamily. {ECO:0000305}.
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DR   AlphaFoldDB; P0C1N2; -.
DR   ConoServer; 1470; Mr3.3 precursor.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR   GO; GO:0008200; F:ion channel inhibitor activity; IEA:InterPro.
DR   GO; GO:0090729; F:toxin activity; IEA:UniProtKB-KW.
DR   InterPro; IPR004214; Conotoxin.
DR   Pfam; PF02950; Conotoxin; 1.
PE   2: Evidence at transcript level;
KW   Disulfide bond; Hydroxylation; Secreted; Signal; Toxin.
FT   SIGNAL          1..19
FT                   /evidence="ECO:0000255"
FT   PROPEP          20..51
FT                   /evidence="ECO:0000250"
FT                   /id="PRO_0000246041"
FT   PEPTIDE         52..68
FT                   /note="Conotoxin Mr3.3"
FT                   /id="PRO_0000246042"
FT   REGION          22..46
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        27..46
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   MOD_RES         65
FT                   /note="4-hydroxyproline"
FT                   /evidence="ECO:0000250"
FT   DISULFID        53..67
FT                   /evidence="ECO:0000250|UniProtKB:P0CI24"
FT   DISULFID        54..63
FT                   /evidence="ECO:0000250|UniProtKB:P0CI24"
FT   DISULFID        59..66
FT                   /evidence="ECO:0000250|UniProtKB:P0CI24"
SQ   SEQUENCE   68 AA;  7418 MW;  DB90198BD04FE15D CRC64;
     MSRLGVLLTI CLLLFPLTAV PLDGDQPADR PAERLQDDIS SEHHPHFDSG RECCGSFACR
     FGCVPCCV