2MF7

Solution structure of the ims domain of the mitochondrial import protein TIM21 from S. cerevisiae

• PDB DOI: https://doi.org/10.2210/pdb2MF7/pdb
• BMRB: 19538

• Classification: PROTEIN TRANSPORT
• Organism(s): Saccharomyces cerevisiae S288C
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2013-10-07 Released: 2014-10-29 
• Deposition Author(s): Bajaj, R., Jaremko, L., Jaremko, M., Becker, S., Zweckstetter, M.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Molecular Basis of the Dynamic Structure of the TIM23 Complex in the Mitochondrial Intermembrane Space.

Bajaj, R., Jaremko, L., Jaremko, M., Becker, S., Zweckstetter, M.

(2014) Structure 22: 1501-1511

• PubMed: 25263020 
• DOI: https://doi.org/10.1016/j.str.2014.07.015
• Primary Citation of Related Structures:  
  2MF7


• PubMed Abstract: 
  

  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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Organizational Affiliation: 

Department of NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 14.76 kDa 
• Atom Count: 1,036 
• Modelled Residue Count: 127 
• Deposited Residue Count: 127 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Mitochondrial import inner membrane translocase subunit TIM21	A	127	Saccharomyces cerevisiae S288C	Mutation(s): 0  Gene Names: TIM21, YGR033C
UniProt
Find proteins for P53220 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P53220  Go to UniProtKB:  P53220

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-10-29 
Deposition Author(s): Bajaj, R., Jaremko, L., Jaremko, M., Becker, S., Zweckstetter, M.

Revision History  

• Version 1.0: 2014-10-29
  Type: Initial release
  
• Version 1.1: 2023-06-14
  Changes: Data collection, Database references, Other
• Version 1.2: 2024-05-15
  Changes: Data collection, Database references