3HYC

Crystal structure of E. coli phosphatase YrbI, with Mg, tetragonal form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.06 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.242 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The Tail of KdsC: CONFORMATIONAL CHANGES CONTROL THE ACTIVITY OF A HALOACID DEHALOGENASE SUPERFAMILY PHOSPHATASE.

Biswas, T.Yi, L.Aggarwal, P.Wu, J.Rubin, J.R.Stuckey, J.A.Woodard, R.W.Tsodikov, O.V.

(2009) J Biol Chem 284: 30594-30603

  • DOI: 10.1074/jbc.M109.012278
  • Primary Citation of Related Structures:  
    3I6B, 2R8E, 2R8Z, 2R8Y, 2R8X, 3HYC

  • PubMed Abstract: 
  • The phosphatase KdsC cleaves 3-deoxy-D-manno-octulosonate 8-phosphate to generate a molecule of inorganic phosphate and Kdo. Kdo is an essential component of the lipopolysaccharide envelope in Gram-negative bacteria. Because lipopolysaccharide is an impo ...

    The phosphatase KdsC cleaves 3-deoxy-D-manno-octulosonate 8-phosphate to generate a molecule of inorganic phosphate and Kdo. Kdo is an essential component of the lipopolysaccharide envelope in Gram-negative bacteria. Because lipopolysaccharide is an important determinant of bacterial resistance and toxicity, KdsC is a potential target for novel antibacterial agents. KdsC belongs to the broad haloacid dehalogenase superfamily. In haloacid dehalogenase superfamily enzymes, substrate specificity and catalytic efficiency are generally dictated by a fold feature called the cap domain. It is therefore not clear why KdsC, which lacks a cap domain, is catalytically efficient and highly specific to 3-deoxy-D-manno-octulosonate 8-phosphate. Here, we present a set of seven structures of tetrameric Escherichia coli KdsC (ranging from 1.4 to 3.06 A in resolution) that model different intermediate states in its catalytic mechanism. A crystal structure of product-bound E. coli KdsC shows how the interface between adjacent monomers defines the active site pocket. Kdo is engaged in a network of polar and nonpolar interactions with residues at this interface, which explains substrate specificity. Furthermore, this structural and kinetic analysis strongly suggests that the binding of the flexible C-terminal region (tail) to the active site makes KdsC catalytically efficient by facilitating product release.


    Organizational Affiliation

    Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, Ann Arbor, Michigan 48109, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
3-deoxy-D-manno-octulosonate 8-phosphate phosphatase ABCDEFGH188Escherichia coli BMutation(s): 0 
Gene Names: YrbI
EC: 3.1.3.45
Find proteins for P67653 (Escherichia coli O6:H1 (strain CFT073 / ATCC 700928 / UPEC))
Explore P67653 
Go to UniProtKB:  P67653
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.06 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.242 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 122.219α = 90
b = 122.219β = 90
c = 202.173γ = 90
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-09-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Refinement description, Version format compliance