Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Genomic Insights into Paucibacter aquatile DH15, a Cyanobactericidal Bacterium, and Comparative Genomics of the Genus Paucibacter

  • Ve Van Le (Cell Factory Research Centre, Korea Research Institute of Bioscience & Biotechnology) ;
  • So-Ra Ko (Cell Factory Research Centre, Korea Research Institute of Bioscience & Biotechnology) ;
  • Hee-Mock Oh (Cell Factory Research Centre, Korea Research Institute of Bioscience & Biotechnology) ;
  • Chi-Yong Ahn (Cell Factory Research Centre, Korea Research Institute of Bioscience & Biotechnology)
  • Received : 2023.07.06
  • Accepted : 2023.09.14
  • Published : 2023.12.28
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Abstract

Microcystis blooms threaten ecosystem function and cause substantial economic losses. Microorganismbased methods, mainly using cyanobactericidal bacteria, are considered one of the most ecologically sound methods to control Microcystis blooms. This study focused on gaining genomic insights into Paucibacter aquatile DH15 that exhibited excellent cyanobactericidal effects against Microcystis. Additionally, a pan-genome analysis of the genus Paucibacter was conducted to enhance our understanding of the ecophysiological significance of this genus. Based on phylogenomic analyses, strain DH15 was classified as a member of the species Paucibacter aquatile. The genome analysis supported that strain DH15 can effectively destroy Microcystis, possibly due to the specific genes involved in the flagellar synthesis, cell wall degradation, and the production of cyanobactericidal compounds. The pan-genome analysis revealed the diversity and adaptability of the genus Paucibacter, highlighting its potential to absorb external genetic elements. Paucibacter species were anticipated to play a vital role in the ecosystem by potentially providing essential nutrients, such as vitamins B7, B12, and heme, to auxotrophic microbial groups. Overall, our findings contribute to understanding the molecular mechanisms underlying the action of cyanobactericidal bacteria against Microcystis and shed light on the ecological significance of the genus Paucibacter.

Keywords

Acknowledgement

This research was supported by the Korea Environment Industry & Technology Institute (KEITI) through Aquatic Ecosystem Conservation Research Program (2022003050004), the National Research Foundation of Korea (2023R1A2C1003308), and Korea Research Institute of Bioscience and Biotechnology (KRIBB) Research Initiative Program (KGM5252322).

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