Biosynthesis of Metabolites from Microorganisms, or Microorganism-Host Interaction? (Volume II)

A special issue of Biology (ISSN 2079-7737). This special issue belongs to the section "Microbiology".

Deadline for manuscript submissions: 15 August 2024 | Viewed by 1012

Special Issue Editors


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Guest Editor
State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
Interests: biosynthesis; biological activity; microbial metabolites; microbe–host reaction
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Guest Editor
School of Life and Health, Hainan University, Haikou 570228, China
Interests: pathogenic fungi; microorganism-host interaction; secondary metabolites; pathogenesis
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Guest Editor
Mediterranean Institute of Oceanography UM 110, Aix-Marseille University, Toulon University, CNRS, IRD, Marseille, France
Interests: marine phytoplankton; marine microbial ecology; marine microzooplankton
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Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Microbial metabolites are compounds that microorganisms use to complete their own life activities. They include primary metabolites such as amino acids, lipids, and organic acids, and secondary metabolites such as antibiotics. Different microorganisms produce different metabolites, resulting in diverse structures of metabolites that are widely used in medicine and industry. The biosynthesis of metabolites also provides new ideas and breakthroughs for research in the life sciences.

For this Special Issue, research on the regulation mechanism of metabolite biosynthesis and analyses of the metabolite biosynthesis process are welcome for submission. Moreover, submissions of research on the biological activity of metabolites are also welcome.

Dr. Fengli Zhang
Prof. Dr. Zhiqiang Liu
Prof. Dr. Michel Denis
Guest Editors

Manuscript Submission Information

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Keywords

  • biosynthesis
  • biological activity
  • biosynthesis regulation
  • microbial metabolites
  • microbe–host reaction

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Published Papers (1 paper)

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Research

19 pages, 3453 KiB  
Article
CopG1, a Novel Transcriptional Regulator Affecting Symbiosis in Bradyrhizobium sp. SUTN9-2
by Praneet Wangthaisong, Pongdet Piromyou, Pongpan Songwattana, Tarnee Phimphong, Apisit Songsaeng, Natcha Pruksametanan, Pakpoom Boonchuen, Jenjira Wongdee, Kamonluck Teamtaisong, Nantakorn Boonkerd, Shusei Sato, Panlada Tittabutr and Neung Teaumroong
Biology 2024, 13(6), 415; https://doi.org/10.3390/biology13060415 - 5 Jun 2024
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Abstract
The symbiotic interaction between leguminous and Bradyrhizobium sp. SUTN9-2 mainly relies on the nodulation process through Nod factors (NFs), while the type IV secretion system (T4SS) acts as an alternative pathway in this symbiosis. Two copies of T4SS (T4SS1 and T4SS2 [...] Read more.
The symbiotic interaction between leguminous and Bradyrhizobium sp. SUTN9-2 mainly relies on the nodulation process through Nod factors (NFs), while the type IV secretion system (T4SS) acts as an alternative pathway in this symbiosis. Two copies of T4SS (T4SS1 and T4SS2) are located on the chromosome of SUTN9-2. ΔT4SS1 reduces both nodule number and nitrogenase activity in all SUTN9-2 nodulating legumes. The functions of three selected genes (copG1, traG1, and virD21) within the region of T4SS1 were examined. We generated deleted mutants and tested them in Vigna radiata cv. SUT4. ΔtraG1 and ΔvirD21 exhibited lower invasion efficiency at the early stages of root infection but could be recently restored. In contrast, ΔcopG1 completely hindered nodule organogenesis and nitrogenase activity in all tested legumes. ΔcopG1 showed low expression of the nodulation gene and ttsI but exhibited high expression levels of the T4SS genes, traG1 and trbE1. The secreted proteins from ΔT4SS1 were down-regulated compared to the wild-type. Although ΔcopG1 secreted several proteins after flavonoid induction, T3SS (nopP and nopX) and the C4-dicarboxylate transporter (dct) were not detected. These results confirm the crucial role of the copG1 gene as a novel key regulator in the symbiotic relationship between SUTN9-2 and legumes. Full article
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