3TWD

glmuC1 in complex with an antibacterial inhibitor

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.217 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

In Vitro Validation of Acetyltransferase Activity of GlmU as an Antibacterial Target in Haemophilus influenzae.

Buurman, E.T., Andrews, B., Gao, N., Hu, J., Keating, T.A., Lahiri, S., Otterbein, L.R., Patten, A.D., Stokes, S.S., Shapiro, A.B.

(2011) J Biol Chem 286: 40734-40742

  • DOI: 10.1074/jbc.M111.274068
  • Primary Citation of Related Structures:  
    3TWD

  • PubMed Abstract: 

    • GlmU is a bifunctional enzyme that is essential for bacterial growth, converting D-glucosamine 1-phosphate into UDP-GlcNAc via acetylation and subsequent uridyl transfer. A biochemical screen of AstraZeneca's compound library using GlmU of Escherichia coli identified novel sulfonamide inhibitors of the acetyltransferase reaction ...

    GlmU is a bifunctional enzyme that is essential for bacterial growth, converting D-glucosamine 1-phosphate into UDP-GlcNAc via acetylation and subsequent uridyl transfer. A biochemical screen of AstraZeneca's compound library using GlmU of Escherichia coli identified novel sulfonamide inhibitors of the acetyltransferase reaction. Steady-state kinetics, ligand-observe NMR, isothermal titration calorimetry, and x-ray crystallography showed that the inhibitors were competitive with acetyl-CoA substrate. Iterative chemistry efforts improved biochemical potency against gram-negative isozymes 300-fold and afforded antimicrobial activity against a strain of Haemophilus influenzae lacking its major efflux pump. Inhibition of precursor incorporation into bacterial macromolecules was consistent with the antimicrobial activity being caused by disruption of peptidoglycan and fatty acid biosyntheses. Isolation and characterization of two different resistant mutant strains identified the GlmU acetyltransferase domain as the molecular target. These data, along with x-ray co-crystal structures, confirmed the binding mode of the inhibitors and explained their relative lack of potency against gram-positive GlmU isozymes. This is the first example of antimicrobial compounds mediating their growth inhibitory effects specifically via GlmU.

    Organizational Affiliation: 

    AstraZeneca R&D Boston, Infection Innovative Medicines Unit, Waltham, Massachusetts 02451, USA. Ed.Buurman@astrazeneca.com



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Bifunctional protein glmUA, B222Escherichia coli K-12Mutation(s): 0 
Gene Names: glmU, yieA, b3730, JW3708
EC: 2.7.7.23 (PDB Primary Data), 2.3.1.157 (PDB Primary Data)
Find proteins for P0ACC7 (Escherichia coli (strain K12))
Explore P0ACC7 
Go to UniProtKB:  P0ACC7
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOB
Query on GOB
Download CCD File 
A, B
4-({5-[(4-aminophenyl)(phenyl)sulfamoyl]-2,4-dimethoxyphenyl}amino)-4-oxobutanoic acid
C24 H25 N3 O7 S
LOWPPNMRMWEKTJ-UHFFFAOYSA-N		 Ligand Interaction
SO4
Query on SO4
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L		 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
GOBIC50:  20   nM  BindingDB
GOBIC50:  18   nM  Binding MOAD
GOBIC50 :  18   nM  PDBBind
GOBIC50:  18   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.217 
  • Space Group: P 63
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 80.526α = 90
b = 80.526β = 90
c = 139.85γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
CrystalCleardata collection
d*TREKdata reduction
d*TREKdata scaling
AMoREphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-10-19
    Type: Initial release
  • Version 1.1: 2011-10-26
    Changes: Database references
  • Version 1.2: 2011-12-14
    Changes: Database references