2MII

NMR structure of E. coli LpoB


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 750 
  • 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

Outer-membrane lipoprotein LpoB spans the periplasm to stimulate the peptidoglycan synthase PBP1B.

Egan, A.J.Jean, N.L.Koumoutsi, A.Bougault, C.M.Biboy, J.Sassine, J.Solovyova, A.S.Breukink, E.Typas, A.Vollmer, W.Simorre, J.P.

(2014) Proc.Natl.Acad.Sci.USA 111: 8197-8202

  • DOI: 10.1073/pnas.1400376111

  • PubMed Abstract: 
  • Bacteria surround their cytoplasmic membrane with an essential, stress-bearing peptidoglycan (PG) layer. Growing and dividing cells expand their PG layer by using membrane-anchored PG synthases, which are guided by dynamic cytoskeletal elements. In E ...

    Bacteria surround their cytoplasmic membrane with an essential, stress-bearing peptidoglycan (PG) layer. Growing and dividing cells expand their PG layer by using membrane-anchored PG synthases, which are guided by dynamic cytoskeletal elements. In Escherichia coli, growth of the mainly single-layered PG is also regulated by outer membrane-anchored lipoproteins. The lipoprotein LpoB is required for the activation of penicillin-binding protein (PBP) 1B, which is a major, bifunctional PG synthase with glycan chain polymerizing (glycosyltransferase) and peptide cross-linking (transpeptidase) activities. Here, we report the structure of LpoB, determined by NMR spectroscopy, showing an N-terminal, 54-aa-long flexible stretch followed by a globular domain with similarity to the N-terminal domain of the prevalent periplasmic protein TolB. We have identified the interaction interface between the globular domain of LpoB and the noncatalytic UvrB domain 2 homolog domain of PBP1B and modeled the complex. Amino acid exchanges within this interface weaken the PBP1B-LpoB interaction, decrease the PBP1B stimulation in vitro, and impair its function in vivo. On the contrary, the N-terminal flexible stretch of LpoB is required to stimulate PBP1B in vivo, but is dispensable in vitro. This supports a model in which LpoB spans the periplasm to interact with PBP1B and stimulate PG synthesis.


    Organizational Affiliation

    Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle upon Tyne NE2 4AX, United Kingdom;,European Molecular Biology Laboratory, Genome Biology Unit, 69117 Heidelberg, Germany; and.,Department of Biochemistry of Membranes, Bijvoet Center for Biomolecular Research, University of Utrecht, 3584 CH, Utrecht, The Netherlands.,European Molecular Biology Laboratory, Genome Biology Unit, 69117 Heidelberg, Germany; and typas@embl.de w.vollmer@ncl.ac.uk jean-pierre.simorre@ibs.fr.,Institut de Biologie Structurale, Université Grenoble Alpes, F-38027 Grenoble, France;Institut de Biologie Structurale, Direction des Sciences du Vivant, Commissariat à l'Energie Atomique, F-38027 Grenoble, France;Institut de Biologie Structurale, Centre National de la Recherche Scientifique, F-38027 Grenoble, France;,Centre for Bacterial Cell Biology, typas@embl.de w.vollmer@ncl.ac.uk jean-pierre.simorre@ibs.fr.,Centre for Bacterial Cell Biology.,Institut de Biologie Structurale, Université Grenoble Alpes, F-38027 Grenoble, France;Institut de Biologie Structurale, Direction des Sciences du Vivant, Commissariat à l'Energie Atomique, F-38027 Grenoble, France;Institut de Biologie Structurale, Centre National de la Recherche Scientifique, F-38027 Grenoble, France; typas@embl.de w.vollmer@ncl.ac.uk jean-pierre.simorre@ibs.fr.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Penicillin-binding protein activator LpoB
A
197N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 750 
  • 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: 2014-05-21
    Type: Initial release
  • Version 1.1: 2014-06-18
    Type: Database references
  • Version 1.2: 2014-06-25
    Type: Database references