E315Q Mutant Form of Fumarase C from E.coli

Experimental Data Snapshot

  • Resolution: 2.60 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.179 

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X-ray crystallographic and kinetic correlation of a clinically observed human fumarase mutation.

Estevez, M.Skarda, J.Spencer, J.Banaszak, L.Weaver, T.M.

(2002) Protein Sci 11: 1552-1557

  • DOI: https://doi.org/10.1110/ps.0201502
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Fumarase catalyzes the reversible conversion of fumarate to S- malate during the operation of the ubiquitous Kreb's cycle. Previous studies have shown that the active site includes side chains from three of the four subunits within the tetrameric enzyme. We used a clinically observed human mutation to narrow our search for potential catalytic groups within the fumarase active site. Offspring homozygous for the missense mutation, a G-955-C transversion in the fumarase gene, results in the substitution of a glutamine at amino acid 319 for the normal glutamic acid. To more fully understand the implications of this mutation, a single-step site-directed mutagenesis method was used to generate the homologous substitution at position 315 within fumarase C from Escherichia coli. Subsequent kinetic and X-ray crystal structure analyses show changes in the turnover number and the cocrystal structure with bound citrate.

  • Organizational Affiliation

    Johns Hopkins University, School of Medicine, Department of Neuroscience, Baltimore, Maryland 21205, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
467Escherichia coliMutation(s): 1 
Gene Names: fumc
Find proteins for P05042 (Escherichia coli (strain K12))
Explore P05042 
Go to UniProtKB:  P05042
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP05042
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.60 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.179 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 104.02α = 90
b = 220β = 90
c = 86.23γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-GENdata reduction
X-GENdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-08-23
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description
  • Version 1.4: 2021-10-27
    Changes: Database references, Derived calculations
  • Version 1.5: 2023-08-16
    Changes: Data collection, Refinement description