3ISZ

Crystal structure of mono-zinc form of succinyl-diaminopimelate desuccinylase from Haemophilus influenzae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.205 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural basis for catalysis by the mono- and dimetalated forms of the dapE-encoded N-succinyl-L,L-diaminopimelic acid desuccinylase.

Nocek, B.P.Gillner, D.M.Fan, Y.Holz, R.C.Joachimiak, A.

(2010) J Mol Biol 397: 617-626

  • DOI: 10.1016/j.jmb.2010.01.062
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Biosynthesis of lysine and meso-diaminopimelic acid in bacteria provides essential components for protein synthesis and construction of the bacterial peptidoglycan cell wall. The dapE operon enzymes synthesize both meso-diaminopimelic acid and lysine ...

    Biosynthesis of lysine and meso-diaminopimelic acid in bacteria provides essential components for protein synthesis and construction of the bacterial peptidoglycan cell wall. The dapE operon enzymes synthesize both meso-diaminopimelic acid and lysine and, therefore, represent potential targets for novel antibacterials. The dapE-encoded N-succinyl-L,L-diaminopimelic acid desuccinylase functions in a late step of the pathway and converts N-succinyl-L,L-diaminopimelic acid to L,L-diaminopimelic acid and succinate. Deletion of the dapE gene is lethal to Helicobacter pylori and Mycobacterium smegmatis, indicating that DapE's are essential for cell growth and proliferation. Since there are no similar pathways in humans, inhibitors that target DapE may have selective toxicity against only bacteria. A major limitation in developing antimicrobial agents that target DapE has been the lack of structural information. Herein, we report the high-resolution X-ray crystal structures of the DapE from Haemophilus influenzae with one and two zinc ions bound in the active site, respectively. These two forms show different activity. Based on these newly determined structures, we propose a revised catalytic mechanism of peptide bond cleavage by DapE enzymes. These structures provide important insight into catalytic mechanism of DapE enzymes as well as a structural foundation that is critical for the rational design of DapE inhibitors.


    Organizational Affiliation

    Midwest Center for Structural Genomics and Structural Biology Center, Argonne National Laboratory, Argonne, IL 60439, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Succinyl-diaminopimelate desuccinylase
A, B
377Haemophilus influenzae Rd KW20Mutation(s): 0 
Gene Names: dapEHI0102HI_0102
EC: 3.5.1.18
Find proteins for P44514 (Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd))
Go to UniProtKB:  P44514
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ZN
Query on ZN

Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.205 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.176α = 90
b = 95.709β = 90
c = 181.179γ = 90
Software Package:
Software NamePurpose
SBC-Collectdata collection
MOLREPphasing
ARP/wARPmodel building
Cootmodel building
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-11-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Source and taxonomy, Version format compliance