PlrA (MSMEG_5223) is an essential polar growth regulator in Mycobacterium smegmatis.

Quintanilla, Samantha Y; Arejan, Neda Habibi; Patel, Parthvi B; Boutte, Cara C · PLoS One · 2023

basic_science · Level V

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Abstract

Mycobacteria expand their cell walls at the cell poles in a manner that is not well described at the molecular level. In this study, we identify a new polar factor, PlrA, that is involved in restricting peptidoglycan metabolism to the cell poles in Mycobacterium smegmatis. We establish that only the N-terminal membrane domain of PlrA is essential. We show that depletion of plrA pheno-copies depletion of polar growth factor Wag31, and that PlrA is involved in regulating the Wag31 polar foci.

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