2L0Y

Complex hMia40-hCox17


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 400 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Molecular chaperone function of Mia40 triggers consecutive induced folding steps of the substrate in mitochondrial protein import.

Banci, L.Bertini, I.Cefaro, C.Cenacchi, L.Ciofi-Baffoni, S.Felli, I.C.Gallo, A.Gonnelli, L.Luchinat, E.Sideris, D.Tokatlidis, K.

(2010) Proc Natl Acad Sci U S A 107: 20190-20195

  • DOI: 10.1073/pnas.1010095107
  • Primary Citation of Related Structures:  
    2L0Y

  • PubMed Abstract: 
  • Several proteins of the mitochondrial intermembrane space are targeted by internal targeting signals. A class of such proteins with α-helical hairpin structure bridged by two intramolecular disulfides is trapped by a Mia40-dependent oxidative process. Here, we describe the oxidative folding mechanism underpinning this process by an exhaustive structural characterization of the protein in all stages and as a complex with Mia40 ...

    Several proteins of the mitochondrial intermembrane space are targeted by internal targeting signals. A class of such proteins with α-helical hairpin structure bridged by two intramolecular disulfides is trapped by a Mia40-dependent oxidative process. Here, we describe the oxidative folding mechanism underpinning this process by an exhaustive structural characterization of the protein in all stages and as a complex with Mia40. Two consecutive induced folding steps are at the basis of the protein-trapping process. In the first one, Mia40 functions as a molecular chaperone assisting α-helical folding of the internal targeting signal of the substrate. Subsequently, in a Mia40-independent manner, folding of the second substrate helix is induced by the folded targeting signal functioning as a folding scaffold. The Mia40-induced folding pathway provides a proof of principle for the general concept that internal targeting signals may operate as a folding nucleus upon compartment-specific activation.


    Organizational Affiliation

    Magnetic Resonance Center, University of Florence, Via Luigi Sacconi 6, 50019 Sesto Fiorentino, Florence, Italy. banci@cerm.unifi.it



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Mitochondrial intermembrane space import and assembly protein 40A146Homo sapiensMutation(s): 1 
Gene Names: CHCHD4MIA40
Find proteins for Q8N4Q1 (Homo sapiens)
Explore Q8N4Q1 
Go to UniProtKB:  Q8N4Q1
NIH Common Fund Data Resources
PHAROS:  Q8N4Q1
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
COX17 cytochrome c oxidase assembly homolog (S. cerevisiae) pseudogene (COX17)B67Homo sapiensMutation(s): 1 
Gene Names: hCG_2020266RP11-189B4.3-001COX17
Find proteins for Q14061 (Homo sapiens)
Explore Q14061 
Go to UniProtKB:  Q14061
NIH Common Fund Data Resources
PHAROS:  Q14061
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 400 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 
  • OLDERADO: 2L0Y Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-11-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2020-02-05
    Changes: Data collection, Database references, Other