2WPB

Crystal structure of the E192N mutant of E. Coli N-acetylneuraminic acid lyase in complex with pyruvate and the inhibitor (2R,3R)-2,3,4- trihydroxy-N,N-dipropylbutanamide in space group P21 crystal form I


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.192 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Structural Insights Into Substrate Specificity in Variants of N-Acetylneuraminic Acid Lyase Produced by Directed Evolution.

Campeotto, I.Bolt, A.H.Harman, T.A.Dennis, C.A.Trinh, C.H.Phillips, S.E.V.Nelson, A.Pearson, A.R.Berry, A.

(2010) J Mol Biol 404: 56

  • DOI: 10.1016/j.jmb.2010.08.008
  • Primary Citation of Related Structures:  
    2WNN, 2WNQ, 2WNZ, 2WO5, 2WPB

  • PubMed Abstract: 
  • The substrate specificity of Escherichia coli N-acetylneuraminic acid lyase was previously switched from the natural condensation of pyruvate with N-acetylmannosamine, yielding N-acetylneuraminic acid, to the aldol condensation generating N-alkylcarboxamide analogues of N-acetylneuraminic acid ...

    The substrate specificity of Escherichia coli N-acetylneuraminic acid lyase was previously switched from the natural condensation of pyruvate with N-acetylmannosamine, yielding N-acetylneuraminic acid, to the aldol condensation generating N-alkylcarboxamide analogues of N-acetylneuraminic acid. This was achieved by a single mutation of Glu192 to Asn. In order to analyze the structural changes involved and to more fully understand the basis of this switch in specificity, we have isolated all 20 variants of the enzyme at position 192 and determined the activities with a range of substrates. We have also determined five high-resolution crystal structures: the structures of wild-type E. coli N-acetylneuraminic acid lyase in the presence and in the absence of pyruvate, the structures of the E192N variant in the presence and in the absence of pyruvate, and the structure of the E192N variant in the presence of pyruvate and a competitive inhibitor (2R,3R)-2,3,4-trihydroxy-N,N-dipropylbutanamide. All structures were solved in space group P2(1) at resolutions ranging from 1.65 Å to 2.2 Å. A comparison of these structures, in combination with the specificity profiles of the variants, reveals subtle differences that explain the details of the specificity changes. This work demonstrates the subtleties of enzyme-substrate interactions and the importance of determining the structures of enzymes produced by directed evolution, where the specificity determinants may change from one substrate to another.


    Organizational Affiliation

    Astbury Center for Structural Molecular Biology, Garstang Building, University of Leeds, Leeds LS2 9JT, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
N-ACETYLNEURAMINATE LYASEA, B, C, D304Escherichia coliMutation(s): 1 
EC: 4.1.3.3
UniProt
Find proteins for P0A6L4 (Escherichia coli (strain K12))
Explore P0A6L4 
Go to UniProtKB:  P0A6L4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A6L4
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZZI
Query on ZZI

Download Ideal Coordinates CCD File 
E [auth A],
F [auth B],
G [auth C],
H [auth D]
(2R,3R)-2,3,4-TRIHYDROXY-N,N-DIPROPYLBUTANAMIDE
C10 H21 N O4
JYHQCIGUBKFYNN-RKDXNWHRSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
KPI
Query on KPI
A, B, C, D L-PEPTIDE LINKINGC9 H16 N2 O4LYS
Binding Affinity Annotations 
IDSourceBinding Affinity
ZZI Binding MOAD:  2WPB Ki: 1.30e+6 (nM) from 1 assay(s)
PDBBind:  2WPB Ki: 1.30e+6 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.192 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.02α = 90
b = 143.741β = 109.9
c = 84.304γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
REFMACphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-08-25
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance