RRC ID 35337
Author Typas A, Banzhaf M, van den Berg van Saparoea B, Verheul J, Biboy J, Nichols RJ, Zietek M, Beilharz K, Kannenberg K, von Rechenberg M, Breukink E, den Blaauwen T, Gross CA, Vollmer W.
Title Regulation of peptidoglycan synthesis by outer-membrane proteins.
Journal Cell
Abstract Growth of the mesh-like peptidoglycan (PG) sacculus located between the bacterial inner and outer membranes (OM) is tightly regulated to ensure cellular integrity, maintain cell shape, and orchestrate division. Cytoskeletal elements direct placement and activity of PG synthases from inside the cell, but precise spatiotemporal control over this process is poorly understood. We demonstrate that PG synthases are also controlled from outside of the sacculus. Two OM lipoproteins, LpoA and LpoB, are essential for the function, respectively, of PBP1A and PBP1B, the major E. coli bifunctional PG synthases. Each Lpo protein binds specifically to its cognate PBP and stimulates its transpeptidase activity, thereby facilitating attachment of new PG to the sacculus. LpoB shows partial septal localization, and our data suggest that the LpoB-PBP1B complex contributes to OM constriction during cell division. LpoA/LpoB and their PBP-docking regions are restricted to γ-proteobacteria, providing models for niche-specific regulation of sacculus growth.
Volume 143(7)
Pages 1097-109
Published 2010-12-23
DOI 10.1016/j.cell.2010.11.038
PII S0092-8674(10)01360-7
PMID 21183073
PMC PMC3060616
MeSH Bacterial Outer Membrane Proteins / chemistry Bacterial Outer Membrane Proteins / metabolism* Cell Division Cell Wall / metabolism Escherichia coli / cytology* Escherichia coli / enzymology Escherichia coli / metabolism* Escherichia coli Proteins / chemistry Escherichia coli Proteins / metabolism* Lipoproteins / chemistry Lipoproteins / metabolism Penicillin-Binding Proteins / metabolism Peptidoglycan / biosynthesis* Peptidoglycan Glycosyltransferase / metabolism Protein Interaction Domains and Motifs
IF 38.637
Times Cited 206
Prokaryotes E. coli ME9062(BW25113)(Keio) Keio collection ASKA collection