2I8T

GDP-mannose mannosyl hydrolase-calcium-GDP-mannose complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.174 
  • R-Value Work: 0.151 
  • R-Value Observed: 0.153 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Molecular basis for substrate selectivity and specificity by an LPS biosynthetic enzyme

Zou, Y.Li, C.Brunzelle, J.S.Nair, S.K.

(2007) Biochemistry 46: 4294-4304

  • DOI: 10.1021/bi061056u
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Diversity in the polysaccharide component of lipopolysaccharide (LPS) contributes to the persistence and pathogenesis of Gram-negative bacteria. The Nudix hydrolase GDP-mannose mannosyl hydrolase (Gmm) contributes to this diversity by regulating the ...

    Diversity in the polysaccharide component of lipopolysaccharide (LPS) contributes to the persistence and pathogenesis of Gram-negative bacteria. The Nudix hydrolase GDP-mannose mannosyl hydrolase (Gmm) contributes to this diversity by regulating the concentration of mannose in LPS biosynthetic pathways. Here, we present seven high-resolution crystal structures of Gmm from the enteropathogenic E. coli strain O128: the structure of the apo enzyme, the cocrystal structure of Gmm bound to the product Mg2+-GDP, two cocrystal structures of precatalytic and turnover complexes of Gmm-Ca2+-GDP-alpha-d-mannose, and three cocrystal structures of an inactive mutant (His-124 --> Leu) Gmm bound to substrates GDP-alpha-d-mannose, GDP-alpha-d-glucose, and GDP-beta-l-fucose. These crystal structures help explain the molecular basis for substrate specificity and promiscuity and provide a structural framework for reconciling previously determined kinetic parameters. Unexpectedly, these structures reveal concerted changes in the enzyme structure that result in the formation of a catalytically competent active site only in the presence of the substrate/product. These structural views of the enzyme may provide a rationale for the design of inhibitors that target the biosynthesis of LPS by pathogenic bacteria.


    Organizational Affiliation

    Department of Biochemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GDP-mannose mannosyl hydrolaseA, B167Escherichia coliMutation(s): 0 
Gene Names: gmm
EC: 3.6.1
Find proteins for Q6XQ58 (Escherichia coli)
Explore Q6XQ58 
Go to UniProtKB:  Q6XQ58
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDD
Query on GDD

Download CCD File 
A, B
GUANOSINE-5'-DIPHOSPHATE-ALPHA-D-MANNOSE
C16 H25 N5 O16 P2
MVMSCBBUIHUTGJ-GDJBGNAASA-N
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
A, B
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.174 
  • R-Value Work: 0.151 
  • R-Value Observed: 0.153 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.636α = 90
b = 81.586β = 90
c = 98.3γ = 90
Software Package:
Software NamePurpose
MOLREPphasing
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-06-19
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance