Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 28.05 kDa 
• Atom Count: 1,971 
• Modelled Residue Count: 250 
• Deposited Residue Count: 250 
• Unique protein chains: 1

 2MHK

E. coli LpoA N-terminal domain

• PDB DOI:  https://doi.org/10.2210/pdb2MHK/pdb
• BMRB: 18853

• Classification: PROTEIN BINDING
• Organism(s): Escherichia coli K-12
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2013-11-26 Released: 2014-06-25 
• Deposition Author(s): Jean, N.L., Bougault, C., Lodge, A., Derouaux, A., Callens, G., Egan, A., Lewis, R.J., Vollmer, W., Simorre, J.

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Experimental Data Snapshot

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

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

• PubMed: 24954617 
• DOI: https://doi.org/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. 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.

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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 --: --

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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: [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Penicillin-binding protein activator LpoA	A	250	Escherichia coli K-12	Mutation(s): 0  Gene Names: b3147, JW3116, lpoA, yraM
UniProt
Find proteins for P45464 (Escherichia coli (strain K12)) Explore P45464  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

Entry History 

Deposition Data

• Released Date: 2014-06-25 
Deposition Author(s): Jean, N.L., Bougault, C., Lodge, A., Derouaux, A., Callens, G., Egan, A., Lewis, R.J., Vollmer, W., Simorre, J.

Revision History  

• 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