ID   MT23B_MYTED             Reviewed;          71 AA.
AC   P80258;
DT   26-SEP-2001, integrated into UniProtKB/Swiss-Prot.
DT   26-SEP-2001, sequence version 1.
DT   02-SEP-2026, entry version 53.
DE   RecName: Full=Metallothionein 20-III isoform B;
DE            Short=MT-20-IIIB;
OS   Mytilus edulis (Blue mussel).
OC   Eukaryota; Metazoa; Spiralia; Lophotrochozoa; Mollusca; Bivalvia;
OC   Autobranchia; Pteriomorphia; Mytilida; Mytiloidea; Mytilidae; Mytilinae;
OC   Mytilus.
OX   NCBI_TaxID=6550;
RN   [1]
RP   PROTEIN SEQUENCE.
RX   PubMed=8243463; DOI=10.1111/j.1432-1033.1993.tb18364.x;
RA   Mackay E.A., Overnell J., Dunbar B., Davidson I., Hunziker P.E.,
RA   Kaegi J.H.R., Fothergill J.E.;
RT   "Complete amino acid sequences of five dimeric and four monomeric forms of
RT   metallothionein from the edible mussel Mytilus edulis.";
RL   Eur. J. Biochem. 218:183-194(1993).
CC   -!- FUNCTION: The metallothioneins are involved in the cellular
CC       sequestration of toxic metal ions.
CC   -!- SUBUNIT: Homodimer.
CC   -!- INDUCTION: By cadmium.
CC   -!- SIMILARITY: Belongs to the metallothionein superfamily. Type 2 family.
CC       {ECO:0000305}.
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DR   PIR; S47577; S47577.
DR   AlphaFoldDB; P80258; -.
DR   SMR; P80258; -.
DR   GO; GO:0046872; F:metal ion binding; IEA:InterPro.
DR   InterPro; IPR061935; Metallothionein.
DR   InterPro; IPR001008; Metalthion_mollusc.
DR   Pfam; PF30063; Metallothionein; 1.
DR   PRINTS; PR00875; MTMOLLUSC.
PE   1: Evidence at protein level;
KW   Cadmium; Direct protein sequencing; Metal-binding; Metal-thiolate cluster.
FT   CHAIN           1..71
FT                   /note="Metallothionein 20-III isoform B"
FT                   /id="PRO_0000197332"
FT   BINDING         14
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         18
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         18
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         23
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         25
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="3"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         29
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="3"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         31
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         31
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="3"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         35
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         37
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         40
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         40
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="3"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         44
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="4"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         46
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="5"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         50
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="5"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         52
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="5"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         52
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="6"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         56
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="4"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         56
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="5"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         62
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="4"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         64
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="6"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         68
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="6"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         70
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="4"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
FT   BINDING         70
FT                   /ligand="Cd(2+)"
FT                   /ligand_id="ChEBI:CHEBI:48775"
FT                   /ligand_label="6"
FT                   /evidence="ECO:0000250|UniProtKB:P33187"
SQ   SEQUENCE   71 AA;  6873 MW;  D4BFD9FFB08577E7 CRC64;
     PGPCNCIETN VCICGTGCSG KCCQCGDACK CASGCGCSGC KVVCRCSGTC ACGCDCTGPT
     NCKCDSGCSC K
//