Article (Scientific journals)
Regulation of the Peptidoglycan Polymerase Activity of PBP1b by Antagonist Actions of the Core Divisome Proteins FtsBLQ and FtsN
Boes, Adrien; olatunji, Samir; Breukink, Eefjan et al.
2019In MBio, 10
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Keywords :
peptidoglycan; interaction; protein; divisome; Lipid II; FtsN; FtsBLQ; PBP1b; PBP3; FtsW; LpoB; membrane
Abstract :
[en] Bacterial cell division is governed by a multiprotein complex called divisome, which facilitates a precise cell wall synthesis at midcell and daughter cell separation. Protein-protein interactions and activity studies using different combinations of the septum synthesis core of the divisome revealed that the glycosyltransferase activity of PBP1b is repressed by FtsBLQ and that the presence of FtsN or LpoB suppresses this inhibition. Moreover, FtsBLQ also inhibits the PBP3 activity on a thioester substrate. These results provide enzymatic evidence of the regulation of the peptidoglycan synthase PBP1b and PBP3 within the divisome. The results confirm that PBP1b plays an important role in E. coli cell division and shed light on the specific role of FtsN, which functions to relieve the repression on PBP1b by FtsBLQ and to initiate septal peptidoglycan synthesis.
Research center :
CIP - Centre d'Ingénierie des Protéines - ULiège
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Boes, Adrien ;  Université de Liège - ULiège > Département des sciences de la vie > Centre d'ingénierie des protéines
olatunji, Samir
Breukink, Eefjan
Terrak, Mohammed  ;  Université de Liège - ULiège > Département des sciences de la vie > Centre d'ingénierie des protéines
Language :
English
Title :
Regulation of the Peptidoglycan Polymerase Activity of PBP1b by Antagonist Actions of the Core Divisome Proteins FtsBLQ and FtsN
Alternative titles :
[fr] Regulation de l'activité de synthèse du peptidoglycane du PBP1b par l'action antagoniste de FtBLQ et FtsN
Publication date :
08 January 2019
Journal title :
MBio
ISSN :
2161-2129
eISSN :
2150-7511
Publisher :
American Society for Microbiology, Washington, United States - Washington
Volume :
10
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Divisome
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 17 February 2019

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