1N8W

Biochemical and Structural Studies of Malate Synthase from Mycobacterium tuberculosis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.190 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Biochemical and structural studies of malate synthase from Mycobacterium tuberculosis

Smith, C.V.Huang, C.C.Miczak, A.Russell, D.G.Sacchettini, J.C.Honer Zu Bentrup, K.

(2003) J.Biol.Chem. 278: 1735-1743

  • DOI: 10.1074/jbc.M209248200
  • Primary Citation of Related Structures:  1N8I
  • Also Cited By: 5C7V, 5C9R, 5C9T, 5C9U, 5C9W, 5C9X, 5CAH, 5CAK, 5CBB, 5CBI, 5CBJ, 5CC3, 5CC5, 5CC6, 5CC7, 5CCZ, 5CEW, 5CJM, 5CJN, 5DRC, 5DRI, 5DX7, 5E9X, 5ECV, 5H8M, 5H8P, 5H8U, 5T8G

  • PubMed Abstract: 
  • Establishment or maintenance of a persistent infection by Mycobacterium tuberculosis requires the glyoxylate pathway. This is a bypass of the tricarboxylic acid cycle in which isocitrate lyase and malate synthase (GlcB) catalyze the net incorporation ...

    Establishment or maintenance of a persistent infection by Mycobacterium tuberculosis requires the glyoxylate pathway. This is a bypass of the tricarboxylic acid cycle in which isocitrate lyase and malate synthase (GlcB) catalyze the net incorporation of carbon during growth of microorganisms on acetate or fatty acids as the primary carbon source. The glcB gene from M. tuberculosis, which encodes malate synthase, was cloned, and GlcB was expressed in Escherichia coli. The influence of media conditions on expression in M. tuberculosis indicated that this enzyme is regulated differentially to isocitrate lyase. Purified GlcB had K(m) values of 57 and 30 microm for its substrates glyoxylate and acetyl coenzyme A, respectively, and was inhibited by bromopyruvate, oxalate, and phosphoenolpyruvate. The GlcB structure was solved to 2.1-A resolution in the presence of glyoxylate and magnesium. We also report the structure of GlcB in complex with the products of the reaction, coenzyme A and malate, solved to 2.7-A resolution. Coenzyme A binds in a bent conformation, and the details of its interactions are described, together with implications on the enzyme mechanism.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, Texas A & M University, College Station, Texas 77843-2128, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Probable malate synthase G
A, B
741Mycobacterium tuberculosis (strain CDC 1551 / Oshkosh)Gene Names: glcB
EC: 2.3.3.9
Find proteins for P9WK16 (Mycobacterium tuberculosis (strain CDC 1551 / Oshkosh))
Go to UniProtKB:  P9WK16
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

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A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
MLT
Query on MLT

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A, B
D-MALATE
(2R)-2-HYDROXYBUTANEDIOIC ACID; 2-HYDROXY-SUCCINIC ACID
C4 H6 O5
BJEPYKJPYRNKOW-UWTATZPHSA-N
 Ligand Interaction
COA
Query on COA

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A
COENZYME A
C21 H36 N7 O16 P3 S
RGJOEKWQDUBAIZ-IBOSZNHHSA-N
 Ligand Interaction
MG
Query on MG

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A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
GLV
Query on GLV

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B
GLYOXYLIC ACID
GLYOXALATE, GLYOXYLATE
C2 H2 O3
HHLFWLYXYJOTON-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.190 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 120.985α = 90.00
b = 120.985β = 90.00
c = 232.787γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-12-18
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance