Structure of the UB2H domain of E.coli PBP1B in complex with LpoB

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 750 
  • Conformers Submitted: 20 
  • Selection Criteria: 20 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Induced conformational changes activate the peptidoglycan synthase PBP1B.

Egan, A.J.F.Maya-Martinez, R.Ayala, I.Bougault, C.M.Banzhaf, M.Breukink, E.Vollmer, W.Simorre, J.P.

(2018) Mol Microbiol 110: 335-356

  • DOI: https://doi.org/10.1111/mmi.14082
  • Primary Citation of Related Structures:  
    6FZK, 6G5R, 6G5S

  • PubMed Abstract: 

    Bacteria surround their cytoplasmic membrane with an essential, stress-bearing peptidoglycan (PG) layer consisting of glycan chains linked by short peptides into a mesh-like structure. Growing and dividing cells expand their PG layer using inner-membrane anchored PG synthases, including Penicillin-binding proteins (PBPs), which participate in dynamic protein complexes to facilitate cell wall growth. In Escherichia coli, and presumably other Gram-negative bacteria, growth of the mainly single layered PG is regulated by outer membrane-anchored lipoproteins. The lipoprotein LpoB is required to activate PBP1B, which is a major, bi-functional PG synthase with glycan chain polymerising (glycosyltransferase) and peptide cross-linking (transpeptidase) activities. In this work we show how the binding of LpoB to the regulatory UB2H domain of PBP1B activates both activities. Binding induces structural changes in the UB2H domain, which transduce to the two catalytic domains by distinct allosteric pathways. We also show how an additional regulator protein, CpoB, is able to selectively modulate the TPase activation by LpoB without interfering with GTase activation.

  • Organizational Affiliation

    The Centre for Bacterial Cell Biology, Institute for Cell and Molecular Biosciences, Newcastle University, Richardson Road, Newcastle upon Tyne, NE2 4AX, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Penicillin-binding protein 1B114Escherichia coli K-12Mutation(s): 0 
Gene Names: mrcBpbpFponBb0149JW0145
EC: (PDB Primary Data), (PDB Primary Data)
Find proteins for P02919 (Escherichia coli (strain K12))
Explore P02919 
Go to UniProtKB:  P02919
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02919
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 750 
  • Conformers Submitted: 20 
  • Selection Criteria: 20 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
French National Research AgencyFranceANR-14-JAMR-0003
Wellcome TrustUnited Kingdom101824/Z/13/Z
French National Research AgencyFranceANR-10-INSB-05-02

Revision History  (Full details and data files)

  • Version 1.0: 2019-02-20
    Type: Initial release
  • Version 1.1: 2019-05-08
    Changes: Data collection
  • Version 1.2: 2023-06-14
    Changes: Data collection, Database references, Other
  • Version 1.3: 2024-06-19
    Changes: Data collection, Database references