Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 12.57 kDa 
• Atom Count: 885 
• Modelled Residue Count: 115 
• Deposited Residue Count: 115 
• Unique protein chains: 1

2MPW

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

• PDB DOI: 10.2210/pdb2MPW/pdb
• BMRB: 25002

• Classification: PEPTIDOGLYCAN BINDING PROTEIN
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2014-06-05 Released: 2014-11-12 
• Deposition Author(s): Coles, M., Chaubey, M., Leo, J.C., Linke, D., Schuetz, M.C., Goetz, F., Autenrieth, I.B.

---

Experimental Data Snapshot

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

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

• PubMed: 25353290 
• DOI: 10.1111/mmi.12840
• Primary Citation of Related Structures:  
  2MPW


• 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 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

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Intimin	A	115	Escherichia coli	Mutation(s): 1  Gene Names: eae, eaeA, E2348C_3939
UniProt
Find proteins for P19809 (Escherichia coli O127:H6 (strain E2348/69 / EPEC)) Explore P19809  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 
• OLDERADO: 2MPW Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2014-06-05 
• Released Date: 2014-11-12 
Deposition Author(s): Coles, M., Chaubey, M., Leo, J.C., Linke, D., Schuetz, M.C., Goetz, F., Autenrieth, I.B.

Revision History  

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