2MHK

E. coli LpoA N-terminal domain


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 700 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Elongated Structure of the Outer-Membrane Activator of Peptidoglycan Synthesis LpoA: Implications for PBP1A Stimulation.

Jean, N.L.Bougault, C.M.Lodge, A.Derouaux, A.Callens, G.Egan, A.J.Ayala, I.Lewis, R.J.Vollmer, W.Simorre, J.P.

(2014) Structure 22: 1047-1054

  • DOI: 10.1016/j.str.2014.04.017

  • PubMed Abstract: 
  • The bacterial cell envelope contains the stress-bearing peptidoglycan layer, which is enlarged during cell growth and division by membrane-anchored synthases guided by cytoskeletal elements. In Escherichia coli, the major peptidoglycan synthase PBP1A ...

    The bacterial cell envelope contains the stress-bearing peptidoglycan layer, which is enlarged during cell growth and division by membrane-anchored synthases guided by cytoskeletal elements. In Escherichia coli, the major peptidoglycan synthase PBP1A requires stimulation by the outer-membrane-anchored lipoprotein LpoA. Whereas the C-terminal domain of LpoA interacts with PBP1A to stimulate its peptide crosslinking activity, little is known about the role of the N-terminal domain. Herein we report its NMR structure, which adopts an all-α-helical fold comprising a series of helix-turn-helix tetratricopeptide-repeat (TPR)-like motifs. NMR spectroscopy of full-length LpoA revealed two extended flexible regions in the C-terminal domain and limited, if any, flexibility between the N- and C-terminal domains. Analytical ultracentrifugation and small-angle X-ray scattering results are consistent with LpoA adopting an elongated shape, with dimensions sufficient to span from the outer membrane through the periplasm to interact with the peptidoglycan synthase PBP1A.


    Related Citations: 
    • Backbone and side-chain 1H, 13C, 15N NMR assignment of the N-terminal domain of Escherichia coli LpoA
      Jean, N.L.,Bougault, C.,Lodge, A.,Derouaux, A.,Callens, G.,Egan, A.,Lewis, R.J.,Vollmer, W.,Simorre, J.
      () TO BE PUBLISHED --: --


    Organizational Affiliation

    University Grenoble Alpes, Institut de Biologie Structurale, F-38027 Grenoble, France; CEA, DSV, Institut de Biologie Structurale, F-38027 Grenoble, France; CNRS, Institut de Biologie Structurale, F-38027 Grenoble, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Penicillin-binding protein activator LpoA
A
250Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: lpoA (yraM)
Find proteins for P45464 (Escherichia coli (strain K12))
Go to UniProtKB:  P45464
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 700 
  • Conformers Submitted: 20 
  • 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: 2014-06-25
    Type: Initial release
  • Version 1.1: 2014-07-16
    Type: Database references
  • Version 1.2: 2014-07-23
    Type: Database references