7AYC

Crystal Structure of human mitochondrial 2-Enoyl Thioester Reductase (MECR) with single mutation G165Q


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.02 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.221 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

An engineered variant of MECR reductase reveals indispensability of long-chain acyl-ACPs for mitochondrial respiration.

Tanvir Rahman, M.Kristian Koski, M.Panecka-Hofman, J.Schmitz, W.Kastaniotis, A.J.Wade, R.C.Wierenga, R.K.Kalervo Hiltunen, J.Autio, K.J.

(2023) Nat Commun 14: 619-619

  • DOI: https://doi.org/10.1038/s41467-023-36358-7
  • Primary Citation of Related Structures:  
    7AYB, 7AYC

  • PubMed Abstract: 

    Mitochondrial fatty acid synthesis (mtFAS) is essential for respiratory function. MtFAS generates the octanoic acid precursor for lipoic acid synthesis, but the role of longer fatty acid products has remained unclear. The structurally well-characterized component of mtFAS, human 2E-enoyl-ACP reductase (MECR) rescues respiratory growth and lipoylation defects of a Saccharomyces cerevisiae Δetr1 strain lacking native mtFAS enoyl reductase. To address the role of longer products of mtFAS, we employed in silico molecular simulations to design a MECR variant with a shortened substrate binding cavity. Our in vitro and in vivo analyses indicate that the MECR G165Q variant allows synthesis of octanoyl groups but not long chain fatty acids, confirming the validity of our computational approach to engineer substrate length specificity. Furthermore, our data imply that restoring lipoylation in mtFAS deficient yeast strains is not sufficient to support respiration and that long chain acyl-ACPs generated by mtFAS are required for mitochondrial function.


  • Organizational Affiliation

    Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Enoyl-[acyl-carrier-protein] reductase, mitochondrial352Homo sapiensMutation(s): 2 
Gene Names: MECRNBRF1CGI-63
EC: 1.3.1.104
UniProt & NIH Common Fund Data Resources
Find proteins for Q9BV79 (Homo sapiens)
Explore Q9BV79 
Go to UniProtKB:  Q9BV79
PHAROS:  Q9BV79
GTEx:  ENSG00000116353 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9BV79
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.02 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.221 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 71.516α = 90
b = 71.516β = 90
c = 143.768γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
Aimlessdata scaling
PDB_EXTRACTdata extraction
DIALSdata reduction
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Sigrid Juselius FoundationFinland--

Revision History  (Full details and data files)

  • Version 1.0: 2022-06-01
    Type: Initial release
  • Version 1.1: 2023-02-15
    Changes: Database references
  • Version 1.2: 2024-02-07
    Changes: Data collection, Refinement description