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Phosphotransferase-dependent accumulation of (p)ppGpp in response to glutamine deprivation in Caulobacter crescentus
The alarmone (p)ppGpp is commonly used by bacteria to quickly respond to nutrient starvation. Although (p)ppGpp synthetases such as SpoT have been extensively studied, little is known about the molecular mechanisms stimulating alarmone synthesis upon starvation. Here, we describe an essential role o...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4848567/ https://www.ncbi.nlm.nih.gov/pubmed/27109061 http://dx.doi.org/10.1038/ncomms11423 |
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author | Ronneau, Séverin Petit, Kenny De Bolle, Xavier Hallez, Régis |
author_facet | Ronneau, Séverin Petit, Kenny De Bolle, Xavier Hallez, Régis |
author_sort | Ronneau, Séverin |
collection | PubMed |
description | The alarmone (p)ppGpp is commonly used by bacteria to quickly respond to nutrient starvation. Although (p)ppGpp synthetases such as SpoT have been extensively studied, little is known about the molecular mechanisms stimulating alarmone synthesis upon starvation. Here, we describe an essential role of the nitrogen-related phosphotransferase system (PTS(Ntr)) in controlling (p)ppGpp accumulation in Caulobacter crescentus. We show that cells sense nitrogen starvation by way of detecting glutamine deprivation using the first enzyme (EI(Ntr)) of PTS(Ntr). Decreasing intracellular glutamine concentration triggers phosphorylation of EI(Ntr) and its downstream components HPr and EIIA(Ntr). Once phosphorylated, both HPr∼P and EIIA(Ntr)∼P stimulate (p)ppGpp accumulation by modulating SpoT activities. This burst of second messenger primarily impacts the non-replicative phase of the cell cycle by extending the G1 phase. This work highlights a new role for bacterial PTS systems in stimulating (p)ppGpp accumulation in response to metabolic cues and in controlling cell cycle progression and cell growth. |
format | Online Article Text |
id | pubmed-4848567 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-48485672016-05-05 Phosphotransferase-dependent accumulation of (p)ppGpp in response to glutamine deprivation in Caulobacter crescentus Ronneau, Séverin Petit, Kenny De Bolle, Xavier Hallez, Régis Nat Commun Article The alarmone (p)ppGpp is commonly used by bacteria to quickly respond to nutrient starvation. Although (p)ppGpp synthetases such as SpoT have been extensively studied, little is known about the molecular mechanisms stimulating alarmone synthesis upon starvation. Here, we describe an essential role of the nitrogen-related phosphotransferase system (PTS(Ntr)) in controlling (p)ppGpp accumulation in Caulobacter crescentus. We show that cells sense nitrogen starvation by way of detecting glutamine deprivation using the first enzyme (EI(Ntr)) of PTS(Ntr). Decreasing intracellular glutamine concentration triggers phosphorylation of EI(Ntr) and its downstream components HPr and EIIA(Ntr). Once phosphorylated, both HPr∼P and EIIA(Ntr)∼P stimulate (p)ppGpp accumulation by modulating SpoT activities. This burst of second messenger primarily impacts the non-replicative phase of the cell cycle by extending the G1 phase. This work highlights a new role for bacterial PTS systems in stimulating (p)ppGpp accumulation in response to metabolic cues and in controlling cell cycle progression and cell growth. Nature Publishing Group 2016-04-25 /pmc/articles/PMC4848567/ /pubmed/27109061 http://dx.doi.org/10.1038/ncomms11423 Text en Copyright © 2016, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Ronneau, Séverin Petit, Kenny De Bolle, Xavier Hallez, Régis Phosphotransferase-dependent accumulation of (p)ppGpp in response to glutamine deprivation in Caulobacter crescentus |
title | Phosphotransferase-dependent accumulation of (p)ppGpp in response to glutamine deprivation in Caulobacter crescentus |
title_full | Phosphotransferase-dependent accumulation of (p)ppGpp in response to glutamine deprivation in Caulobacter crescentus |
title_fullStr | Phosphotransferase-dependent accumulation of (p)ppGpp in response to glutamine deprivation in Caulobacter crescentus |
title_full_unstemmed | Phosphotransferase-dependent accumulation of (p)ppGpp in response to glutamine deprivation in Caulobacter crescentus |
title_short | Phosphotransferase-dependent accumulation of (p)ppGpp in response to glutamine deprivation in Caulobacter crescentus |
title_sort | phosphotransferase-dependent accumulation of (p)ppgpp in response to glutamine deprivation in caulobacter crescentus |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4848567/ https://www.ncbi.nlm.nih.gov/pubmed/27109061 http://dx.doi.org/10.1038/ncomms11423 |
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