A YajQ-LysR-like, cyclic di-GMP-dependent system regulating biosynthesis of an antifungal antibiotic in a crop-protecting bacterium, Lysobacter enzymogenes
| Autor: | Shan-Ho Chou, Yu-Chuan Wang, Sen Han, Mark Gomelsky, Guoliang Qian, Danyu Shen, Yong-Gui Gao |
|---|---|
| Přispěvatelé: | School of Biological Sciences |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Cyclic di-GMP Antifungal Agents LysR Operon Soil Science Virulence antifungal antibiotic Plant Science Lysobacter HSAF Biology Xanthomonas campestris 01 natural sciences Microbiology 03 medical and health sciences chemistry.chemical_compound Molecular Biology Transcription factor Cyclic GMP Antifungal antibiotic Activator (genetics) c‐di‐GMP Biological sciences [Science] Original Articles Gene Expression Regulation Bacterial biology.organism_classification 030104 developmental biology chemistry bacteria Original Article Agronomy and Crop Science CdgL 010606 plant biology & botany Antifungal Antibiotic |
| Zdroj: | Molecular Plant Pathology |
| Popis: | YajQ, a binding protein of the universal bacterial second messenger cyclic di-GMP (c-di-GMP), affects virulence in several bacterial pathogens, including Xanthomonas campestris. In this bacterium, YajQ interacts with the transcription factor LysR. Upon c-di-GMP binding, the whole c-di-GMP-YajQ-LysR complex is found to dissociate from DNA, resulting in virulence gene regulation. Here, we identify a YajQ-LysR-like system in the bacterial biocontrol agent Lysobacter enzymogenes OH11 that secretes an antifungal antibiotic, heat-stable antifungal factor (HSAF) against crop fungal pathogens. We show that the YajQ homologue, CdgL (c-di-GMP receptor interacting with LysR) affects expression of the HSAF biosynthesis operon by interacting with the transcription activator LysR. The CdgL-LysR interaction enhances the apparent affinity of LysR to the promoter region upstream of the HSAF biosynthesis operon, which increases operon expression. Unlike the homologues CdgL (YajQ)-LysR system in X. campestris, we show that c-di-GMP binding to CdgL seems to weaken CdgL-LysR interactions and promote the release of CdgL from the LysR-DNA complex, which leads to decreased expression. Together, this study takes the YajQ-LysR-like system from bacterial pathogens to a crop-protecting bacterium that is able to regulate antifungal HSAF biosynthesis via disassembly of the c-di-GMP receptor-transcription activator complex. Published version |
| Databáze: | OpenAIRE |
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