2MPW

Solution structure of the LysM region of the E. coli Intimin periplasmic domain


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 95 
  • Conformers Submitted: 23 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The Intimin periplasmic domain mediates dimerisation and binding to peptidoglycan.

Leo, J.C.Oberhettinger, P.Chaubey, M.Schutz, M.Kuhner, D.Bertsche, U.Schwarz, H.Gotz, F.Autenrieth, I.B.Coles, M.Linke, D.

(2015) Mol.Microbiol. 95: 80-100

  • DOI: 10.1111/mmi.12840

  • PubMed Abstract: 
  • Intimin and Invasin are prototypical inverse (Type Ve) autotransporters and important virulence factors of enteropathogenic Escherichia coli and Yersinia spp. respectively. In addition to a C-terminal extracellular domain and a β-barrel transmembrane ...

    Intimin and Invasin are prototypical inverse (Type Ve) autotransporters and important virulence factors of enteropathogenic Escherichia coli and Yersinia spp. respectively. In addition to a C-terminal extracellular domain and a β-barrel transmembrane domain, both proteins also contain a short N-terminal periplasmic domain that, in Intimin, includes a lysin motif (LysM), which is thought to mediate binding to peptidoglycan. We show that the periplasmic domain of Intimin does bind to peptidoglycan both in vitro and in vivo, but only under acidic conditions. We were able to determine a dissociation constant of 0.8 μM for this interaction, whereas the Invasin periplasmic domain, which lacks a LysM, bound only weakly in vitro and failed to bind peptidoglycan in vivo. We present the solution structure of the Intimin LysM, which has an additional α-helix conserved within inverse autotransporter LysMs but lacking in others. In contrast to previous reports, we demonstrate that the periplasmic domain of Intimin mediates dimerisation. We further show that dimerisation and peptidoglycan binding are general features of LysM-containing inverse autotransporters. Peptidoglycan binding by the periplasmic domain in the infection process may aid in resisting mechanical and chemical stress during transit through the gastrointestinal tract.


    Organizational Affiliation

    Department of Protein Evolution, Max Planck Institute for Developmental Biology, 72076, Tübingen, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Intimin
A
115Escherichia coli O127:H6 (strain E2348/69 / EPEC)Mutation(s): 1 
Gene Names: eae (eaeA)
Find proteins for P19809 (Escherichia coli O127:H6 (strain E2348/69 / EPEC))
Go to UniProtKB:  P19809
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 95 
  • Conformers Submitted: 23 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-11-12
    Type: Initial release
  • Version 1.1: 2015-01-14
    Type: Database references