A starvation-induced regulator, RovM, acts as a switch for planktonic/biofilm state transition in Yersinia pseudotuberculosis

Abstract The transition between the planktonic state and the biofilm-associated state is a key developmental decision for pathogenic bacteria. Biofilm formation by Yersinia pestis is regulated by hmsHFRS genes (β-1, 6-N-acetyl-D-glucosamine synthesis operon) in its flea vector and in vitro. However,...

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Autores principales: Ruoxi Zhao, Yunhong Song, Qingyun Dai, Yiwen Kang, Junfeng Pan, Lingfang Zhu, Lei Zhang, Yao Wang, Xihui Shen
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Publicado: Nature Portfolio 2017
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spelling oai:doaj.org-article:36c8f1925d7b4508bf071a77cfd54d332021-12-02T16:08:10ZA starvation-induced regulator, RovM, acts as a switch for planktonic/biofilm state transition in Yersinia pseudotuberculosis10.1038/s41598-017-00534-92045-2322https://doaj.org/article/36c8f1925d7b4508bf071a77cfd54d332017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00534-9https://doaj.org/toc/2045-2322Abstract The transition between the planktonic state and the biofilm-associated state is a key developmental decision for pathogenic bacteria. Biofilm formation by Yersinia pestis is regulated by hmsHFRS genes (β-1, 6-N-acetyl-D-glucosamine synthesis operon) in its flea vector and in vitro. However, the mechanism of biofilm formation in Yersinia pseudotuberculosis remains elusive. In this study, we demonstrate that the LysR-type regulator RovM inversely regulates biofilm formation and motility in Y. pseudotuberculosis by acting as a transcriptional regulator of these two functions. RovM is strongly induced during growth in minimal media but strongly repressed in complex media. On one hand, RovM enhances bacterial motility by activating the expression of FlhDC, the master regulator of flagellar genes, via the recognition of an operator upstream of the flhDC promoter. On the other hand, RovM represses β-GlcNAc production under nutrition-limited conditions, negatively regulating hmsHFRS expression by directly binding to the −35 element of its promoter. Compared to wild-type bacteria, the rovM mutant established denser biofilms and caused more extensive mortality in mice and silkworm larvae. These results indicate that RovM acts as a molecular switch to coordinate the expression of genes involved in biofilm formation and motility in response to the availability of nutrients.Ruoxi ZhaoYunhong SongQingyun DaiYiwen KangJunfeng PanLingfang ZhuLei ZhangYao WangXihui ShenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-13 (2017)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Ruoxi Zhao
Yunhong Song
Qingyun Dai
Yiwen Kang
Junfeng Pan
Lingfang Zhu
Lei Zhang
Yao Wang
Xihui Shen
A starvation-induced regulator, RovM, acts as a switch for planktonic/biofilm state transition in Yersinia pseudotuberculosis
description Abstract The transition between the planktonic state and the biofilm-associated state is a key developmental decision for pathogenic bacteria. Biofilm formation by Yersinia pestis is regulated by hmsHFRS genes (β-1, 6-N-acetyl-D-glucosamine synthesis operon) in its flea vector and in vitro. However, the mechanism of biofilm formation in Yersinia pseudotuberculosis remains elusive. In this study, we demonstrate that the LysR-type regulator RovM inversely regulates biofilm formation and motility in Y. pseudotuberculosis by acting as a transcriptional regulator of these two functions. RovM is strongly induced during growth in minimal media but strongly repressed in complex media. On one hand, RovM enhances bacterial motility by activating the expression of FlhDC, the master regulator of flagellar genes, via the recognition of an operator upstream of the flhDC promoter. On the other hand, RovM represses β-GlcNAc production under nutrition-limited conditions, negatively regulating hmsHFRS expression by directly binding to the −35 element of its promoter. Compared to wild-type bacteria, the rovM mutant established denser biofilms and caused more extensive mortality in mice and silkworm larvae. These results indicate that RovM acts as a molecular switch to coordinate the expression of genes involved in biofilm formation and motility in response to the availability of nutrients.
format article
author Ruoxi Zhao
Yunhong Song
Qingyun Dai
Yiwen Kang
Junfeng Pan
Lingfang Zhu
Lei Zhang
Yao Wang
Xihui Shen
author_facet Ruoxi Zhao
Yunhong Song
Qingyun Dai
Yiwen Kang
Junfeng Pan
Lingfang Zhu
Lei Zhang
Yao Wang
Xihui Shen
author_sort Ruoxi Zhao
title A starvation-induced regulator, RovM, acts as a switch for planktonic/biofilm state transition in Yersinia pseudotuberculosis
title_short A starvation-induced regulator, RovM, acts as a switch for planktonic/biofilm state transition in Yersinia pseudotuberculosis
title_full A starvation-induced regulator, RovM, acts as a switch for planktonic/biofilm state transition in Yersinia pseudotuberculosis
title_fullStr A starvation-induced regulator, RovM, acts as a switch for planktonic/biofilm state transition in Yersinia pseudotuberculosis
title_full_unstemmed A starvation-induced regulator, RovM, acts as a switch for planktonic/biofilm state transition in Yersinia pseudotuberculosis
title_sort starvation-induced regulator, rovm, acts as a switch for planktonic/biofilm state transition in yersinia pseudotuberculosis
publisher Nature Portfolio
publishDate 2017
url https://doaj.org/article/36c8f1925d7b4508bf071a77cfd54d33
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