Reviewed, UniProtKB/Swiss-Prot P68495 (MT_CAIMO)

Names and origin

Protein names	Recommended name:     Metallothionein       Short name(s)=MT
Organism	Cairina moschata (Muscovy duck)
Taxonomic identifier	8855 [NCBI]
Taxonomic lineage	Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Archosauria › Dinosauria › Saurischia › Theropoda › Coelurosauria › Aves › Neognathae › Anseriformes › Anatidae › Cairina

Protein attributes

Sequence length	63 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Evidence at protein level.

General annotation (Comments)

Function	Metallothioneins have a high content of cysteine residues that bind various heavy metals.
Domain	Class I metallothioneins contain 2 metal-binding domains: four divalent ions are chelated within cluster A of the alpha domain and are coordinated via cysteinyl thiolate bridges to 11 cysteine ligands. Cluster B, the corresponding region within the beta domain, can ligate three divalent ions to 9 cysteines.
Sequence similarities	Belongs to the metallothionein superfamily. Type 1 family.

Ontologies

Keywords
Ligand	Metal-binding Metal-thiolate cluster Zinc
Technical term	Direct protein sequencing
Gene Ontology (GO)
None. [Check GOA]

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view
Molecule processing
	Chain	1 – 63	63	Metallothionein
Regions
	Region	1 – 30	30	Beta
	Region	31 – 63	33	Alpha
Sites
	Metal binding	6	1	Cluster B
	Metal binding	8	1	Cluster B
	Metal binding	14	1	Cluster B
	Metal binding	16	1	Cluster B
	Metal binding	20	1	Cluster B
	Metal binding	22	1	Cluster B
	Metal binding	25	1	Cluster B
	Metal binding	27	1	Cluster B
	Metal binding	30	1	Cluster B
	Metal binding	34	1	Cluster A
	Metal binding	35	1	Cluster A
	Metal binding	37	1	Cluster A
	Metal binding	38	1	Cluster A
	Metal binding	42	1	Cluster A
	Metal binding	45	1	Cluster A
	Metal binding	49	1	Cluster A
	Metal binding	51	1	Cluster A
	Metal binding	59	1	Cluster A
	Metal binding	61	1	Cluster A
	Metal binding	62	1	Cluster A

Sequences

	Sequence		Length	Mass (Da)
	P68495-1 [UniParc]. Last modified November 23, 2004. Version 1. Checksum: 0062422501B9CC84	FASTA	63	6,462
	10 20 30 40 50 60 MDPQDCTCAA GDSCSCAGSC KCKNCRCRSC RKSCCSCCPA GCNNCAKGCV CKEPASSKCS CCH

References

[1]	"Primary sequence of duck metallothionein." Lin L.-Y., Liu L.-F., Tam M.F., Huang P.C., Vestling M., Fenselau C. Biochim. Biophys. Acta 1041:31-35(1990) [PubMed: 2223844] [Abstract] Cited for: PROTEIN SEQUENCE.
[2]	"Complete homology in metallothionein from two genera of ducks and their hybrids." Lin L.-Y., Huang P.C. Biochem. Biophys. Res. Commun. 168:182-187(1990) [PubMed: 2327997] [Abstract] Cited for: PROTEIN SEQUENCE.
[3]	"Structure and expression of metallothionein gene in ducks." Lee Y.J., Chen Y.P., Wang S.H., Chow W.Y., Lin L.-Y. Gene 176:85-92(1996) [PubMed: 8918237] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA]. Tissue: Liver.

Cross-references

Sequence databases
EMBLGenBankDDBJ	U34230 mRNA. Translation: AAC60047.1.
PIR	C34620.
3D structure databases
HSSP	HSSP built from PDB template 2MHU based on UniProtKB P02795.
ModBase	Search...
Phylogenomic databases
HOVERGEN	P68495.
Family and domain databases
InterPro	IPR015874. 4-disulphide_core. IPR002400. GF_cysknot. IPR003019. Metallothionein_sfam_euk. IPR000006. Metallothionein_vert. IPR001008. Metallthion_2. [Graphical view]
Gene3D	G3DSA:4.10.10.10. Metallothionein_vert. 1 hit.
PANTHER	PTHR23299. Metallothionein_vert. 1 hit.
Pfam	PF00131. Metallothio. 1 hit. [Graphical view]
PRINTS	PR00003. 4DISULPHCORE. PR00438. GFCYSKNOT. PR00875. MTMOLLUSC. PR00860. MTVERTEBRATE.
PROSITE	PS00203. METALLOTHIONEIN_VRT. 1 hit. [Graphical view]
ProDom	P68495. [Graphical view] [Entries sharing at least one domain]
BLOCKS	Search...
Other Resources
ProtoNet	Search...

Entry information

Entry name

MT_CAIMO

Accession

Primary (citable) accession number: P68495
Secondary accession number(s): P09576

Entry history

Integrated into UniProtKB/Swiss-Prot:	November 23, 2004
Last sequence update:	November 23, 2004
Last modified:	July 22, 2008
This is version 21 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)