3CUZ

Atomic Resolution Structures of Escherichia coli and Bacillis anthracis Malate Synthase A: Comparison with Isoform G and Implications for Structure Based Drug Design


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.04 Å
  • R-Value Free: 0.166 
  • R-Value Work: 0.153 

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This is version 1.1 of the entry. See complete history

Literature

Atomic resolution structures of Escherichia coli and Bacillus anthracis malate synthase A: comparison with isoform G and implications for structure-based drug discovery

Lohman, J.R.Olson, A.C.Remington, S.J.

(2008) Protein Sci. 17: 1935-1945

  • DOI: 10.1110/ps.036269.108
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Enzymes of the glyoxylate shunt are important for the virulence of pathogenic organisms such as Mycobacterium tuberculosis and Candida albicans. Two isoforms have been identified for malate synthase, the second enzyme in the pathway. Isoform A, found ...

    Enzymes of the glyoxylate shunt are important for the virulence of pathogenic organisms such as Mycobacterium tuberculosis and Candida albicans. Two isoforms have been identified for malate synthase, the second enzyme in the pathway. Isoform A, found in fungi and plants, comprises approximately 530 residues, whereas isoform G, found only in bacteria, is larger by approximately 200 residues. Crystal structures of malate synthase isoform G from Escherichia coli and Mycobacterium tuberculosis were previously determined at moderate resolution. Here we describe crystal structures of E. coli malate synthase A (MSA) in the apo form (1.04 A resolution) and in complex with acetyl-coenzyme A and a competitive inhibitor, possibly pyruvate or oxalate (1.40 A resolution). In addition, a crystal structure for Bacillus anthracis MSA at 1.70 A resolution is reported. The increase in size between isoforms A and G can be attributed primarily to an inserted alpha/beta domain that may have regulatory function. Upon binding of inhibitor or substrate, several active site loops in MSA undergo large conformational changes. However, in the substrate bound form, the active sites of isoforms A and G from E. coli are nearly identical. Considering that inhibitors bind with very similar affinities to both isoforms, MSA is as an excellent platform for high-resolution structural studies and drug discovery efforts.


    Organizational Affiliation

    Department of Physics, Institute of Molecular Biology, University of Oregon, Eugene, OR 97403-1229, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Malate synthase A
A
532Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: aceB (mas)
EC: 2.3.3.9
Find proteins for P08997 (Escherichia coli (strain K12))
Go to UniProtKB:  P08997
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.04 Å
  • R-Value Free: 0.166 
  • R-Value Work: 0.153 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 52.077α = 90.00
b = 73.888β = 98.03
c = 71.739γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
ADSCdata collection
HKL-2000data reduction
REFMACrefinement
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-11-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance