3FI7

Crystal Structure of the autolysin Auto (Lmo1076) from Listeria monocytogenes, catalytic domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.180 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for autoinhibition and activation of Auto, a virulence-associated peptidoglycan hydrolase of Listeria monocytogenes.

Bublitz, M.Polle, L.Holland, C.Heinz, D.W.Nimtz, M.Schubert, W.D.

(2009) Mol.Microbiol. 71: 1509-1522

  • DOI: 10.1111/j.1365-2958.2009.06619.x

  • PubMed Abstract: 
  • During a bacterial infection, each successive step is orchestrated by a dedicated set of virulence factors. In Gram-positive bacteria, the presentation or release of such factors is crucially dependent on the continual remodelling of the cell wall. W ...

    During a bacterial infection, each successive step is orchestrated by a dedicated set of virulence factors. In Gram-positive bacteria, the presentation or release of such factors is crucially dependent on the continual remodelling of the cell wall. We have investigated the autolysin or peptidoglycan hydrolase Auto (Lmo1076) from the human pathogen Listeria monocytogenes to structurally and biochemically underpin its role in host cell invasion. We demonstrate that Auto is an N-acetylglucosaminidase, that it is autoinhibited when newly secreted but activated by proteolytic cleavage, that it has an acidic pH optimum and that it preferentially cleaves acetylated over de-acetylated peptidoglycan. The crystal structure of Auto, the first for glycoside hydrolase family 73, and the first for a listerial autolysin, indicates that autoinhibition is due to an N-terminal alpha-helix unique to Auto that physically blocks the substrate-binding cleft. We identify Glu122 and Glu156 as the two catalytically essential carboxylate groups. The physical properties of Auto as well as its localization to lipoteichoic acid by its four C-terminal GW modules imply cell wall degradation by Auto to be highly co-ordinated. Its spatio-temporally controlled activation and localized activity in an acidified environment indicate that it facilitates remodelling of the cell wall and may be involved in co-ordinating the release of virulence factors at specific stages of an infection.


    Organizational Affiliation

    Molecular Host Pathogen Interactions, Division of Structural Biology, Helmholtz Centre for Infection Research, Inhoffenstr, Braunschweig, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lmo1076 protein
A
183Listeria monocytogenes serovar 1/2a (strain ATCC BAA-679 / EGD-e)Mutation(s): 0 
Find proteins for Q8Y842 (Listeria monocytogenes serovar 1/2a (strain ATCC BAA-679 / EGD-e))
Go to UniProtKB:  Q8Y842
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.180 
  • Space Group: P 62 2 2
Unit Cell:
Length (Å)Angle (°)
a = 133.500α = 90.00
b = 133.500β = 90.00
c = 88.900γ = 120.00
Software Package:
Software NamePurpose
ADSCdata collection
PHENIXrefinement
PHASERphasing
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-04-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.2: 2017-06-28
    Type: Source and taxonomy