Bacillus subtilis FolE is sustained by the ZagA zinc metallochaperone and the alarmone ZTP under conditions of zinc deficiency.

ABSTRACT: Bacteria tightly regulate intracellular zinc levels to ensure sufficient zinc to support essential functions, while preventing toxicity. The bacterial response to zinc limitation includes the expression of putative zinc metallochaperones belonging to subfamily 1 of the COG0523 family of G3E GTPases. However, the client proteins and the metabolic processes served by these chaperones are unclear. Here, we demonstrate that the Bacillus subtilis YciC zinc metallochaperone (here renamed ZagA for ZTP activated GTPase A) supports de novo folate biosynthesis under conditions of zinc limitation, and interacts directly with the zinc-dependent GTP cyclohydrolase IA, FolE (GCYH-IA). Furthermore, we identify a role for the alarmone ZTP, a modified purine biosynthesis intermediate, in the response to zi

SUBMITTER: Chandrangsu P 

PROVIDER: S-EPMC6736736 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature