Murein segregation in Escherichia coli
Journal of Bacteriology, ISSN: 0021-9193, Vol: 179, Issue: 9, Page: 2823-2834
1997
- 339Citations
- 208Captures
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Metrics Details
- Citations339
- Citation Indexes339
- 339
- CrossRef311
- Captures208
- Readers208
- 207
Article Description
Peptidoglycan (murein) segregation has been studied by means of a new labeling method. The method relies on the ability of Escherichia coli cells to incorporate D-Cys into macromolecular murein. The incorporation depends on a periplasmic amino acid exchange reaction. At low concentrations, D-Cys is innocuous to the cell. The distribution of modified murein in purified sacculi can be traced and visualized by immunodetection of the -SH groups by fluorescence and electron microscopy techniques. Analysis of murein segregation in wild-type and cell division mutant strains revealed that murein in polar caps is metabolically inert and is segregated in a conservative fashion. Elongation of the sacculus apparently occurs by diffuse insertion of precursors over the cylindrical part of the cell surface. At the initiation of cell division, there is a FtsZ-dependent localized activation of murein synthesis at the potential division sites. Penicillin-binding protein 3 and the products of the division genes ftsA and ftsQ are dispensable for the activation of division sites. As a consequence, under restrictive conditions ftsA, ftsI, or ftsQ mutants generate filamentous sacculi with rings of all-new murein at the positions where septa would otherwise develop.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0030902118&origin=inward; http://dx.doi.org/10.1128/jb.179.9.2823-2834.1997; http://www.ncbi.nlm.nih.gov/pubmed/9139895; https://journals.asm.org/doi/10.1128/jb.179.9.2823-2834.1997; https://dx.doi.org/10.1128/jb.179.9.2823-2834.1997; https://jb.asm.org/content/179/9/2823
American Society for Microbiology
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