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Protein

Metallothionein

Gene

mt-a

Organism
Xenopus laevis (African clawed frog)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Experimental evidence at protein leveli

Functioni

Metallothioneins have a high content of cysteine residues that bind various heavy metals.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi6Divalent metal cation; cluster B1
Metal bindingi8Divalent metal cation; cluster B1
Metal bindingi14Divalent metal cation; cluster B1
Metal bindingi16Divalent metal cation; cluster B1
Metal bindingi20Divalent metal cation; cluster B1
Metal bindingi22Divalent metal cation; cluster B1
Metal bindingi25Divalent metal cation; cluster B1
Metal bindingi27Divalent metal cation; cluster B1
Metal bindingi30Divalent metal cation; cluster B1
Metal bindingi34Divalent metal cation; cluster A1
Metal bindingi35Divalent metal cation; cluster A1
Metal bindingi37Divalent metal cation; cluster A1
Metal bindingi38Divalent metal cation; cluster A1
Metal bindingi42Divalent metal cation; cluster A1
Metal bindingi45Divalent metal cation; cluster A1
Metal bindingi49Divalent metal cation; cluster A1
Metal bindingi51Divalent metal cation; cluster A1
Metal bindingi58Divalent metal cation; cluster A1
Metal bindingi60Divalent metal cation; cluster A1
Metal bindingi61Divalent metal cation; cluster A1

GO - Molecular functioni

Keywordsi

LigandMetal-binding, Metal-thiolate cluster

Names & Taxonomyi

Protein namesi
Recommended name:
Metallothionein
Short name:
MT
Alternative name(s):
XlMT-A
Gene namesi
Name:mt-a
OrganismiXenopus laevis (African clawed frog)
Taxonomic identifieri8355 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiAmphibiaBatrachiaAnuraPipoideaPipidaeXenopodinaeXenopusXenopus

Organism-specific databases

XenbaseiXB-GENE-6254442. mt4.

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001973211 – 62MetallothioneinAdd BLAST62

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei1N-acetylmethionine1 Publication1

Keywords - PTMi

Acetylation

Structurei

3D structure databases

ProteinModelPortaliQ05890.
SMRiQ05890.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni1 – 30BetaAdd BLAST30
Regioni31 – 62AlphaAdd BLAST32

Domaini

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 similaritiesi

Phylogenomic databases

KOiK14739.

Family and domain databases

Gene3Di4.10.10.10. 1 hit.
InterProiView protein in InterPro
IPR003019. Metalthion.
IPR017854. Metalthion_dom.
IPR023587. Metalthion_dom_vert.
IPR000006. Metalthion_vert.
IPR018064. Metalthion_vert_metal_BS.
PANTHERiPTHR23299. PTHR23299. 1 hit.
PfamiView protein in Pfam
PF00131. Metallothio. 1 hit.
PRINTSiPR00860. MTVERTEBRATE.
SUPFAMiSSF57868. SSF57868. 1 hit.
PROSITEiView protein in PROSITE
PS00203. METALLOTHIONEIN_VRT. 1 hit.

Sequencei

Sequence statusi: Complete.

Q05890-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MDPQDCKCET GASCSCGTTC SCSNCKCTSC KKSCCSCCPA ECSKCSQGCH
60
CEKGSKKCSC CN
Length:62
Mass (Da):6,403
Last modified:February 1, 1994 - v1
Checksum:iAF7329487A3C7982
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
M96729 mRNA. Translation: AAB59949.1.
X69380 mRNA. Translation: CAA49177.1.
U14649 Genomic DNA. Translation: AAB60616.1.
BC091777 mRNA. Translation: AAH91777.1.
PIRiI51538.
RefSeqiNP_001081042.1. NM_001087573.1.
UniGeneiXl.2784.

Genome annotation databases

GeneIDi394349.
KEGGixla:394349.

Similar proteinsi

Entry informationi

Entry nameiMT_XENLA
AccessioniPrimary (citable) accession number: Q05890
Secondary accession number(s): Q58ES6
Entry historyiIntegrated into UniProtKB/Swiss-Prot: February 1, 1994
Last sequence update: February 1, 1994
Last modified: May 10, 2017
This is version 77 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Direct protein sequencing

Documents

  1. Metallothioneins
    Classification of metallothioneins and list of entries
  2. SIMILARITY comments
    Index of protein domains and families