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
  • Primary Citation of Related Structures:  
    2MHK

  • 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 requires stimulation by the outer-membrane-anchored lipoprotein LpoA ...

    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. Electronic address: jean-pierre.simorre@ibs.fr.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Penicillin-binding protein activator LpoAA250Escherichia coli K-12Mutation(s): 0 
Gene Names: b3147JW3116lpoAyraM
UniProt
Find proteins for P45464 (Escherichia coli (strain K12))
Explore P45464 
Go to UniProtKB:  P45464
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 700 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 2MHK Olderado

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-06-25
    Type: Initial release
  • Version 1.1: 2014-07-16
    Changes: Database references
  • Version 1.2: 2014-07-23
    Changes: Database references