2MF7 image
Entry Detail
PDB ID:
2MF7
Keywords:
PROTEIN TRANSPORT
Title:
Solution structure of the ims domain of the mitochondrial import protein TIM21 from S. cerevisiae
Biological Source:
Source Organism:
Saccharomyces cerevisiae
Host Organism:
Escherichia coli
PDB Version:
Deposition Date:
2013-10-07
Release Date:
2014-10-29
Method Details:
Experimental Method:
SOLUTION NMR
Conformers Calculated:
200
Conformers Submitted:
20
Selection Criteria:
structures with the lowest energy
2MF7 validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:Mitochondrial import inner membrane translocase subunit TIM21
Chain IDs:A
Chain Length:127
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae
UniProt ID:P53220 Pfam ID:PF08294
Ligand Molecules
NA
Primary Citation
Molecular Basis of the Dynamic Structure of the TIM23 Complex in the Mitochondrial Intermembrane Space.
Structure 22 1501 1511 (2014)
PMID: 25263020 DOI: 10.1016/j.str.2014.07.015

Abstact

The presequence translocase TIM23 is a highly dynamic complex in which its subunits can adopt multiple conformations and undergo association-dissociation to facilitate import of proteins into mitochondria. Despite the importance of protein-protein interactions in TIM23, little is known about the molecular details of these processes. Using nuclear magnetic resonance spectroscopy, we characterized the dynamic interaction network of the intermembrane space domains of Tim23, Tim21, Tim50, and Tom22 at single-residue level. We show that Tim23(IMS) contains multiple sites to efficiently interact with the intermembrane space domain of Tim21 and to bind to Tim21, Tim50, and Tom22. In addition, we reveal the atomic details of the dynamic Tim23(IMS)-Tim21(IMS) complex. The combined data support a central role of the intermembrane space domain of Tim23 in the formation and regulation of the presequence translocase.

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Primary Citation of related structures
2CIU