MGP Database

New search | Record Overview | Ontology/Pathway Information | Domain Information | UniProt Annotations | Related Proteins
MGP004859

UniProt Annotations

Entry Information
Gene Nametranslocase of inner mitochondrial membrane 13 homolog (yeast)
Protein EntryTIM13_HUMAN
UniProt IDQ9Y5L4
SpeciesHuman
Comments
Comment typeDescription
DomainThe twin CX3C motif contains 4 conserved Cys residues that form 2 disulfide bonds in the mitochondrial intermembrane space. However, during the transit of TIMM13 from cytoplasm into mitochondrion, the Cys residues probably coordinate zinc, thereby preventing folding and allowing its transfer across mitochondrial outer membrane (By similarity). {ECO:0000250}.
FunctionMitochondrial intermembrane chaperone that participates in the import and insertion of some multi-pass transmembrane proteins into the mitochondrial inner membrane. Also required for the transfer of beta-barrel precursors from the TOM complex to the sorting and assembly machinery (SAM complex) of the outer membrane. Acts as a chaperone-like protein that protects the hydrophobic precursors from aggregation and guide them through the mitochondrial intermembrane space. The TIMM8-TIMM13 complex mediates the import of proteins such as TIMM23, SLC25A12/ARALAR1 and SLC25A13/ARALAR2, while the predominant TIMM9-TIMM10 70 kDa complex mediates the import of much more proteins. {ECO:0000269|PubMed:11489896, ECO:0000269|PubMed:15254020}.
SimilarityBelongs to the small Tim family. {ECO:0000305}.
Subcellular LocationMitochondrion inner membrane {ECO:0000269|PubMed:11489896}; Peripheral membrane protein {ECO:0000269|PubMed:11489896}; Intermembrane side {ECO:0000269|PubMed:11489896}.
SubunitHeterohexamer; composed of 3 copies of TIMM8 (TIMM8A or TIMM8B) and 3 copies of TIMM13, named soluble 70 kDa complex. Associates with the TIM22 complex, whose core is composed of TIMM22.
Tissue SpecificityUbiquitous, with highest expression in heart, kidney, liver and skeletal muscle.
  logo