4F78

Crystal Structure of Vancomycin Resistance D,D-dipeptidase VanXYg


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.186 
  • R-Value Work: 0.154 

wwPDB Validation 3D Report Full Report


This is version 1.5 of the entry. See complete history

Literature

Structural basis for the evolution of vancomycin resistance D,D-peptidases.

Meziane-Cherif, D.Stogios, P.J.Evdokimova, E.Savchenko, A.Courvalin, P.

(2014) Proc.Natl.Acad.Sci.USA 111: 5872-5877

  • DOI: 10.1073/pnas.1402259111
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Vancomycin resistance in Gram-positive bacteria is due to production of cell-wall precursors ending in D-Ala-D-Lac or D-Ala-D-Ser, to which vancomycin exhibits low binding affinities, and to the elimination of the high-affinity precursors ending in D ...

    Vancomycin resistance in Gram-positive bacteria is due to production of cell-wall precursors ending in D-Ala-D-Lac or D-Ala-D-Ser, to which vancomycin exhibits low binding affinities, and to the elimination of the high-affinity precursors ending in D-Ala-D-Ala. Depletion of the susceptible high-affinity precursors is catalyzed by the zinc-dependent D,D-peptidases VanX and VanY acting on dipeptide (D-Ala-D-Ala) or pentapeptide (UDP-MurNac-L-Ala-D-Glu-L-Lys-D-Ala-D-Ala), respectively. Some of the vancomycin resistance operons encode VanXY D,D-carboxypeptidase, which hydrolyzes both di- and pentapeptide. The molecular basis for the diverse specificity of Van D,D-peptidases remains unknown. We present the crystal structures of VanXYC and VanXYG in apo and transition state analog-bound forms and of VanXYC in complex with the D-Ala-D-Ala substrate and D-Ala product. Structural and biochemical analysis identified the molecular determinants of VanXY dual specificity. VanXY residues 110-115 form a mobile cap over the catalytic site, whose flexibility is involved in the switch between di- and pentapeptide hydrolysis. Structure-based alignment of the Van D,D-peptidases showed that VanY enzymes lack this element, which promotes binding of the penta- rather than that of the dipeptide. The structures also highlight the molecular basis for selection of D-Ala-ending precursors over the modified resistance targets. These results illustrate the remarkable adaptability of the D,D-peptidase fold in response to antibiotic pressure via evolution of specific structural elements that confer hydrolytic activity against vancomycin-susceptible peptidoglycan precursors.


    Organizational Affiliation

    Unité des Agents Antibactériens, Institut Pasteur, 75724 Paris Cedex 15, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
D,D-dipeptidase/D,D-carboxypeptidase
A
255Enterococcus faecalisMutation(s): 0 
Gene Names: vanYG2 (vanXYG)
Find proteins for Q9KHL8 (Enterococcus faecalis)
Go to UniProtKB:  Q9KHL8
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

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A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

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A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CL
Query on CL

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A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

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A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

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A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

Unit Cell:
Length (Å)Angle (°)
a = 38.912α = 90.00
b = 43.960β = 99.19
c = 80.199γ = 90.00
Software Package:
Software NamePurpose
HKL-3000data collection
PHENIXmodel building
SCALAdata scaling
XDSdata reduction
PHENIXrefinement
PHENIXphasing

Structure Validation

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Entry History 

Revision History 

  • Version 1.0: 2012-05-23
    Type: Initial release
  • Version 1.1: 2013-10-02
    Type: Structure summary
  • Version 1.2: 2013-10-16
    Type: Structure summary
  • Version 1.3: 2014-01-22
    Type: Other
  • Version 1.4: 2014-04-23
    Type: Database references
  • Version 1.5: 2014-05-14
    Type: Database references