Two component system CpxR/A regulates the prodigiosin biosynthesis by negative control in Serratia marcescens FS14.

Shenshen Qiu, Shanshan Jia, Fan Zhang, Xia Liu, Tingting Ran, Weiwu Wang, Changlin Wang, Dongqing Xu

Biochemical and biophysical research communications 2021 Nov 19

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Prodigiosin is a tripyrrole red secondary metabolite synthesized by many microorganisms, including Serratia marcescens. In this study, we found that the deletion of the gene of sensor kinase CpxA dramatically decreased the prodigiosin production, while the deletion of the gene of the response regulator CpxR or both genes of CpxRA has no effect on prodigiosin production, the kinase function of CpxA is not essential for its regulation on prodigiosin production while the phosphorylation site of CpxR is required. We further demonstrated that the CpxA regulates the prodigiosin biosynthesis at the transcriptional level and the phosphatase activity of CpxA plays vital roles in the regulation of prodigiosin biosynthesis. Finally, we proposed that CpxR/A regulates the prodigiosin biosynthesis by negative control and the phosphorylation level of CpxR may determine the positive or negative control of the genes it regulated. Copyright © 2021 Elsevier Inc. All rights reserved.

Citation

Shenshen Qiu, Shanshan Jia, Fan Zhang, Xia Liu, Tingting Ran, Weiwu Wang, Changlin Wang, Dongqing Xu. Two component system CpxR/A regulates the prodigiosin biosynthesis by negative control in Serratia marcescens FS14. Biochemical and biophysical research communications. 2021 Nov 19;579:136-140