ID   MT_BALMY                Reviewed;          61 AA.
AC   O18842;
DT   26-SEP-2001, integrated into UniProtKB/Swiss-Prot.
DT   01-JAN-1998, sequence version 1.
DT   27-MAR-2024, entry version 81.
DE   RecName: Full=Metallothionein;
DE            Short=MT;
OS   Balaena mysticetus (Bowhead whale).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC   Eutheria; Laurasiatheria; Artiodactyla; Whippomorpha; Cetacea; Mysticeti;
OC   Balaenidae; Balaena.
OX   NCBI_TaxID=27602;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   TISSUE=Liver;
RA   Kaysen J., O'Hara T., Goodwin T., Linnehan R., Hammond T.;
RL   Submitted (AUG-1997) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Metallothioneins have a high content of cysteine residues
CC       that bind various heavy metals. {ECO:0000250}.
CC   -!- SUBUNIT: Monomer. {ECO:0000250}.
CC   -!- DOMAIN: Class I metallothioneins contain 2 metal-binding domains: four
CC       divalent ions are chelated within cluster A of the alpha domain and are
CC       coordinated via cysteinyl thiolate bridges to 11 cysteine ligands.
CC       Cluster B, the corresponding region within the beta domain, can ligate
CC       three divalent ions to 9 cysteines.
CC   -!- SIMILARITY: Belongs to the metallothionein superfamily. Type 1 family.
CC       {ECO:0000305}.
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DR   EMBL; AF022117; AAB72006.1; -; mRNA.
DR   AlphaFoldDB; O18842; -.
DR   SMR; O18842; -.
DR   GO; GO:0005737; C:cytoplasm; ISS:UniProtKB.
DR   GO; GO:0005634; C:nucleus; ISS:UniProtKB.
DR   GO; GO:0008270; F:zinc ion binding; ISS:UniProtKB.
DR   GO; GO:0071294; P:cellular response to zinc ion; ISS:UniProtKB.
DR   GO; GO:0045926; P:negative regulation of growth; ISS:UniProtKB.
DR   Gene3D; 4.10.10.10; Metallothionein Isoform II; 1.
DR   InterPro; IPR017854; Metalthion_dom_sf.
DR   InterPro; IPR023587; Metalthion_dom_sf_vert.
DR   InterPro; IPR000006; Metalthion_vert.
DR   InterPro; IPR018064; Metalthion_vert_metal_BS.
DR   PANTHER; PTHR23299; METALLOTHIONEIN; 1.
DR   PANTHER; PTHR23299:SF63; METALLOTHIONEIN 1H-LIKE PROTEIN 1-RELATED; 1.
DR   Pfam; PF00131; Metallothio; 1.
DR   PRINTS; PR00860; MTVERTEBRATE.
DR   SUPFAM; SSF57868; Metallothionein; 1.
DR   PROSITE; PS00203; METALLOTHIONEIN_VRT; 1.
PE   3: Inferred from homology;
KW   Acetylation; Metal-binding; Metal-thiolate cluster.
FT   CHAIN           1..61
FT                   /note="Metallothionein"
FT                   /id="PRO_0000197257"
FT   REGION          1..29
FT                   /note="Beta"
FT   REGION          30..61
FT                   /note="Alpha"
FT   BINDING         5
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="1"
FT                   /ligand_note="in cluster B"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         7
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="1"
FT                   /ligand_note="in cluster B"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         7
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="2"
FT                   /ligand_note="in cluster B"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         13
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="2"
FT                   /ligand_note="in cluster B"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         15
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="2"
FT                   /ligand_note="in cluster B"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         15
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="3"
FT                   /ligand_note="in cluster B"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         19
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="3"
FT                   /ligand_note="in cluster B"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         21
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="1"
FT                   /ligand_note="in cluster B"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         24
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="1"
FT                   /ligand_note="in cluster B"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         24
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="3"
FT                   /ligand_note="in cluster B"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         26
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="2"
FT                   /ligand_note="in cluster B"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         29
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="3"
FT                   /ligand_note="in cluster B"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         33
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="4"
FT                   /ligand_note="in cluster A"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         34
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="4"
FT                   /ligand_note="in cluster A"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         34
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="5"
FT                   /ligand_note="in cluster A"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         36
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="5"
FT                   /ligand_note="in cluster A"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         37
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="5"
FT                   /ligand_note="in cluster A"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         37
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="6"
FT                   /ligand_note="in cluster A"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         41
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="6"
FT                   /ligand_note="in cluster A"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         44
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="4"
FT                   /ligand_note="in cluster A"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         44
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="6"
FT                   /ligand_note="in cluster A"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         48
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="4"
FT                   /ligand_note="in cluster A"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         50
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="5"
FT                   /ligand_note="in cluster A"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         50
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="7"
FT                   /ligand_note="in cluster A"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         57
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="7"
FT                   /ligand_note="in cluster A"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         59
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="7"
FT                   /ligand_note="in cluster A"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         60
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="6"
FT                   /ligand_note="in cluster A"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   BINDING         60
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /ligand_label="7"
FT                   /ligand_note="in cluster A"
FT                   /evidence="ECO:0000250|UniProtKB:P02795"
FT   MOD_RES         1
FT                   /note="N-acetylmethionine"
FT                   /evidence="ECO:0000250|UniProtKB:P68301"
SQ   SEQUENCE   61 AA;  6025 MW;  4D0A7C5E1D23A4A3 CRC64;
     MDPNCSCAAG GSCTCAGSCK CKECKCTSCK KSCCSCCPPG CTKCAQGCVC KGASDKCNCC
     A
//