Colocalization and interaction between elongasome and divisome during a preparative cell division phase in Escherichia coli. Issue 5 (6th February 2013)

• Record Type: Journal Article
• Authors: van der, René; Verheul, Jolanda; Vischer, Norbert O. E.; Alexeeva, Svetlana; Hoogendoorn, Eelco; Postma, Marten; Banzhaf, Manuel; Vollmer, Waldemar; den, Tanneke
• Is Part Of: Molecular microbiology. Volume 87:Issue 5(2013)
• Page Start: 1074
• Page End: 1087
• Publication Date: 2013-02-06
• Subjects: Molecular microbiology -- Periodicals; 572.829
• DOI: 10.1111/mmi.12150
• Languages: English
• ISSNs: 0950-382X

Abstract

<abstract abstract-type="main"> <title>Summary</title> <p>The rod‐shaped bacterium <italic>Escherichia coli</italic> grows by insertion of peptidoglycan into the lateral wall during cell elongation and synthesis of new poles during cell division. The monofunctional transpeptidases PBP2 and PBP3 are part of specialized protein complexes called elongasome and divisome, respectively, which catalyse peptidoglycan extension and maturation. Endogenous immunolabelled PBP2 localized in the cylindrical part of the cell as well as transiently at midcell. Using the novel image analysis tool Coli‐Inspector to analyse protein localization as function of the bacterial cell age, we compared PBP2 localization with that of other <italic>E. coli</italic> cell elongation and division proteins including PBP3. Interestingly, the midcell localization of the two transpeptidases overlaps in time during the early period of divisome maturation. Försters Resonance Energy Transfer (FRET) experiments revealed an interaction between PBP2 and PBP3 when both are present at midcell. A decrease in the midcell diameter is visible after 40% of the division cycle indicating that the onset of new cell pole synthesis starts much earlier than previously identified by visual inspection. The data support a new model of the division cycle in which the elongasome and divisome interact to prepare for cell division.</p> </abstract>