1D9E

STRUCTURE OF E. COLI KDO8P SYNTHASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.199 

wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

Structure and mechanism of 3-deoxy-D-manno-octulosonate 8-phosphate synthase.

Radaev, S.Dastidar, P.Patel, M.Woodard, R.W.Gatti, D.L.

(2000) J Biol Chem 275: 9476-9484

  • DOI: https://doi.org/10.1074/jbc.275.13.9476
  • Primary Citation of Related Structures:  
    1D9E

  • PubMed Abstract: 

    3-deoxy-D-manno-octulosonate 8-phosphate (KDO8P) synthase catalyzes the condensation of phosphoenolpyruvate (PEP) with arabinose 5-phosphate (A5P) to form KDO8P and inorganic phosphate. KDO8P is the phosphorylated precursor of 3-deoxy-D-manno-octulosonate, an essential sugar of the lipopolysaccharide of Gram-negative bacteria. The crystal structure of the Escherichia coli KDO8P synthase has been determined by multiple wavelength anomalous diffraction and the model has been refined to 2.4 A (R-factor, 19.9%; R-free, 23.9%). KDO8P synthase is a homotetramer in which each monomer has the fold of a (beta/alpha)(8) barrel. On the basis of the features of the active site, PEP and A5P are predicted to bind with their phosphate moieties 13 A apart such that KDO8P synthesis would proceed via a linear intermediate. A reaction similar to KDO8P synthesis, the condensation of phosphoenolpyruvate, and erythrose 4-phosphate to form 3-deoxy-D-arabino-heptulosonate 7-phosphate (DAH7P), is catalyzed by DAH7P synthase. In the active site of DAH7P synthase the two substrates PEP and erythrose 4-phosphate appear to bind in a configuration similar to that proposed for PEP and A5P in the active site of KDO8P synthase. This observation suggests that KDO8P synthase and DAH7P synthase evolved from a common ancestor and that they adopt the same catalytic strategy.


  • Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Wayne State University School of Medicine, Detroit, Michigan 48201, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
3-DEOXY-D-MANNO-OCTULOSONATE 8-PHOSPHATE SYNTHASE
A, B, C, D
284Escherichia coliMutation(s): 0 
EC: 4.1.2.16
UniProt
Find proteins for P0A715 (Escherichia coli (strain K12))
Explore P0A715 
Go to UniProtKB:  P0A715
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A715
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.199 
  • Space Group: I 2 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 228.62α = 90
b = 228.62β = 90
c = 228.62γ = 90
Software Package:
Software NamePurpose
SOLVEphasing
CNSrefinement
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-05-10
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-04
    Changes: Refinement description
  • Version 1.4: 2017-10-11
    Changes: Refinement description
  • Version 1.5: 2024-02-07
    Changes: Data collection, Database references, Derived calculations