The DOI matches its Crossref record; 62 of the 62 references it cites were found in a registry or an index.
Lytic transglycosylases mitigate periplasmic crowding by degrading soluble cell wall turnover products
Open accessAbstract
The peptidoglycan cell wall is a predominant structure of bacteria, determining cell shape and supporting survival in diverse conditions. Peptidoglycan is dynamic and requires regulated synthesis of new material, remodeling, and turnover – or autolysis – of old material. Despite exploitation of peptidoglycan synthesis as an antibiotic target, we lack a fundamental understanding of how peptidoglycan synthesis and autolysis intersect to maintain the cell wall. Here, we uncover a critical physiological role for a widely misunderstood class of autolytic enzymes, lytic transglycosylases (LTGs). We demonstrate that LTG activity is essential to survival by contributing to periplasmic processes upstream and independent of peptidoglycan recycling. Defects accumulate in Vibrio cholerae LTG mutants due to generally inadequate LTG activity, rather than absence of specific enzymes, and essential LTG activities are likely independent of protein-protein interactions, as heterologous expression of a non-native LTG rescues growth of a conditional LTG-null mutant. Lastly, we demonstrate that soluble, uncrosslinked, endopeptidase-dependent peptidoglycan chains, also detected in the wild-type, are enriched in LTG mutants, and that LTG mutants are hypersusceptible to the production of diverse periplasmic polymers. Collectively, our results suggest that LTGs prevent toxic crowding of the periplasm with synthesis-derived peptidoglycan polymers and, contrary to prevailing models, that this autolytic function can be temporally separate from peptidoglycan synthesis.
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Cites
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Cited by
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Molecular mechanism of condensin I activation by KIF4A
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Mitochondrial genome diversity across the subphylum Saccharomycotina
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Metadata
- Authors
- Weaver, A. I., Alvarez, L., Rosch, K. M., Ahmed, A., Wang, G. S., van Nieuwenhze, M. S., Cava, F., & Dörr, T.
- Venue
- eLife
- Publisher
- eLife Sciences Publications, Ltd
- Published
- 2022-01-24
- Volume
- 11
- ISSN
- 2050-084X (ISSN-L)
- OpenAlex
- W4220823647
- Cited by
- 363
- References
- 62
- FWCI
- 41.60
- Type
- journal article
- Language
- en
- Open access
- gold
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- Weaver, A. I., Alvarez, L., Rosch, K. M., Ahmed, A., Wang, G. S., van Nieuwenhze, M. S., Cava, F., & Dörr, T. (2022). Lytic transglycosylases mitigate periplasmic crowding by degrading soluble cell wall turnover products. eLife. https://doi.org/10.7554/elife.73178
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