Article ; Online: A moonlighting role for LysM peptidoglycan binding domains underpins Enterococcus faecalis daughter cell separation.
Communications biology
2023 Volume 6, Issue 1, Page(s) 428
Abstract: Control of cell size and morphology is of paramount importance for bacterial fitness. In the opportunistic pathogen Enterococcus faecalis, the formation of diplococci and short cell chains facilitates innate immune evasion and dissemination in the host. ... ...
Abstract | Control of cell size and morphology is of paramount importance for bacterial fitness. In the opportunistic pathogen Enterococcus faecalis, the formation of diplococci and short cell chains facilitates innate immune evasion and dissemination in the host. Minimisation of cell chain size relies on the activity of a peptidoglycan hydrolase called AtlA, dedicated to septum cleavage. To prevent autolysis, AtlA activity is tightly controlled, both temporally and spatially. Here, we show that the restricted localization of AtlA at the septum occurs via an unexpected mechanism. We demonstrate that the C-terminal LysM domain that allows the enzyme to bind peptidoglycan is essential to target this enzyme to the septum inside the cell before its translocation across the membrane. We identify a membrane-bound cytoplasmic protein partner (called AdmA) involved in the recruitment of AtlA via its LysM domains. This work reveals a moonlighting role for LysM domains, and a mechanism evolved to restrict the subcellular localization of a potentially lethal autolysin to its site of action. |
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MeSH term(s) | Enterococcus faecalis/metabolism ; Peptidoglycan/metabolism ; Bacterial Proteins/metabolism ; Cell Wall/metabolism ; N-Acetylmuramoyl-L-alanine Amidase/genetics ; N-Acetylmuramoyl-L-alanine Amidase/metabolism ; Cell Separation |
Chemical Substances | Peptidoglycan ; Bacterial Proteins ; N-Acetylmuramoyl-L-alanine Amidase (EC 3.5.1.28) |
Language | English |
Publishing date | 2023-04-18 |
Publishing country | England |
Document type | Journal Article ; Research Support, Non-U.S. Gov't |
ISSN | 2399-3642 |
ISSN (online) | 2399-3642 |
DOI | 10.1038/s42003-023-04808-z |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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