Genome-wide mapping of Vibrio cholerae VpsT binding identifies a mechanism for c-di-GMP homeostasis
Genome-wide mapping of Vibrio cholerae VpsT binding identifies a mechanism for c-di-GMP homeostasis
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霍乱弧菌 VpsT 结合的全基因组图谱确定了 c-di-GMP 稳态机制
DOI:
10.1101/2021.10.04.463056
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发表时间:
2021
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影响因子:
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通讯作者:
Guest T
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文献类型:
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作者:
Guest T
Many bacteria use cyclic dimeric guanosine monophosphate (c-di-GMP) to control changes in lifestyle. The molecule, synthesized by proteins having diguanylate cyclase activity, is often a signal to transition from motile to sedentary behaviour. InVibrio cholerae, c-di-GMP can exert its effects via the transcription factors VpsT and VpsR. Together, these proteins activate genes needed forV. choleraeto form biofilms. In this work, we have mapped the genome-wide distribution of VpsT in a search for further regulatory roles. We show that VpsT binds 23 loci and recognises a degenerate DNA palindrome having the consensus 5′-W−5R−4[CG]−3Y−2W−1W+1R+2[GC]+3Y+4W+5-3′. Most genes targeted by VpsT encode functions related to motility, biofilm formation, or c-di-GMP metabolism. Most notably, VpsT activates expression of thevpvABCoperon that encodes a diguanylate cyclase. This creates a positive feedback loop needed to maintain intracellular levels of c-di-GMP. Mutation of the key VpsT binding site, upstream ofvpvABC, severs the loop and c-di-GMP levels fall accordingly. Hence, as well as relaying the c-di-GMP signal, VpsT impacts c-di-GMP homeostasis.
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Conner JG;Zamorano-Sánchez D;Park JH;Sondermann H;Yildiz FH
通讯作者:
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DOI:
--
发表时间:
2022
期刊:
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