1KQ7

E315Q Mutant Form of Fumarase C from E.coli


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.179 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

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: 10.1110/ps.0201502

  • 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 enz ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FUMARATE HYDRATASE CLASS II
A, B
467Escherichia coli (strain K12)Mutation(s): 1 
Gene Names: fumC
EC: 4.2.1.2
Find proteins for P05042 (Escherichia coli (strain K12))
Go to UniProtKB:  P05042
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CIT
Query on CIT

Download SDF File 
Download CCD File 
A, B
CITRIC ACID
C6 H8 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-N
 Ligand Interaction
MLT
Query on MLT

Download SDF File 
Download CCD File 
A
D-MALATE
(2R)-2-HYDROXYBUTANEDIOIC ACID; 2-HYDROXY-SUCCINIC ACID
C4 H6 O5
BJEPYKJPYRNKOW-UWTATZPHSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.179 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 104.020α = 90.00
b = 220.000β = 90.00
c = 86.230γ = 90.00
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORrefinement
X-PLORmodel building
X-GENdata reduction
X-GENdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-08-23
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-11
    Type: Refinement description