Metabolic switching of during hypoxia is controlled by the virulence regulator PhoP.
IR@IMTECH: CSIR-Institute of Microbial Technology, Chandigarh
View Archive Info| Field | Value | |
| Title |
Metabolic switching of during hypoxia is controlled by the virulence regulator PhoP.
|
|
| Creator |
Singh, Prabhat Ranjan
Anil Kumar, Vijjamarri Sarkar, Dibyendu |
|
| Subject |
QR Microbiology
|
|
| Description |
(Mtb) retains the ability to establish an asymptomatic latent infection. A fundamental question in mycobacterial physiology is to understand the mechanisms involved in hypoxic stress, a critical player in persistence. Here, we show that the virulence regulator PhoP responds to hypoxia, the dormancy signal and effectively integrates hypoxia with nitrogen metabolism. We also provide evidence to demonstrate that both under nitrogen limiting conditions and during hypoxia, locus controls key genes involved in nitrogen metabolism. Consistently, under hypoxia shows growth attenuation even with surplus nitrogen, the alternate electron acceptor, and complementation of the mutant restores bacterial growth. Together, our observations provide new biological insights into the role of PhoP in integrating nitrogen metabolism with hypoxia by the assistance of the hypoxia regulator DosR. The results have significant implications on the mechanism of intracellular survival and growth of the tubercle bacilli under a hypoxic environment within the phagosome. Mtb retains the unique ability to establish an asymptomatic latent infection. To understand the mechanisms involved in hypoxic stress which plays a critical role in persistence, we show that the virulence regulator PhoP is linked to hypoxia, the dormancy signal. In keeping with this, was shown to play a major role in Mtb growth under hypoxia even in presence of surplus nitrogen, the alternate electron acceptor. Our results showing regulation of hypoxia-responsive genes provide new biological insights into role of the virulence regulator in metabolic switching by sensing hypoxia and integrating nitrogen metabolism with hypoxia by the assistance of the hypoxia regulator DosR.
|
|
| Publisher |
American Society for Microbiology (ASM)
|
|
| Date |
2020-03-11
|
|
| Type |
Article
PeerReviewed |
|
| Relation |
https://jb.asm.org/content/202/7/e00705-19.long
http://crdd.osdd.net/open/2539/ |
|
| Identifier |
Singh, Prabhat Ranjan and Anil Kumar, Vijjamarri and Sarkar, Dibyendu (2020) Metabolic switching of during hypoxia is controlled by the virulence regulator PhoP. Journal of bacteriology, 202 (7). e00705-19. ISSN 1098-5530
|
|