| Title: | Four New Genes of Cyanobacterium Synechococcus elongatus PCC 7942 Are Responsible for Sensitivity to 2-Nonanone |
| Author(s): | Koksharova OA; Popova AA; Plyuta VA; Khmel IA; |
| Address: | "Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Leninskie Gory, 1-40, 119992 Moscow, Russia. Institute of Molecular Genetics of National Research Center 'Kurchatov Institute', Kurchatov Square, 2, 123182 Moscow, Russia. Winogradsky Institute of Microbiology, The Federal Research Centre 'Fundamentals of Biotechnology' of the Russian Academy of Sciences, Prospekt 60 let Oktyabrya, 7/2, 117312 Moscow, Russia" |
| DOI: | 10.3390/microorganisms8081234 |
| ISSN/ISBN: | 2076-2607 (Print) 2076-2607 (Electronic) 2076-2607 (Linking) |
| Abstract: | "Microbial volatile organic compounds (VOCs) are cell metabolites that affect many physiological functions of prokaryotic and eukaryotic organisms. Earlier we have demonstrated the inhibitory effects of soil bacteria volatiles, including ketones, on cyanobacteria. Cyanobacteria are very sensitive to ketone action. To investigate the possible molecular mechanisms of the ketone 2-nonanone influence on cyanobacterium Synechococcus elongatus PCC 7942, we applied a genetic approach. After Tn5-692 transposon mutagenesis, several 2-nonanone resistant mutants have been selected. Four different mutant strains were used for identification of the impaired genes (Synpcc7942_1362, Synpcc7942_0351, Synpcc7942_0732, Synpcc7942_0726) that encode correspondingly: 1) a murein-peptide ligase Mpl that is involved in the biogenesis of cyanobacteria cell wall; 2) a putative ABC transport system substrate-binding proteins MlaD, which participates in ABC transport system that maintains lipid asymmetry in the gram-negative outer membrane by aberrantly localized phospholipids transport from outer to inner membranes of bacterial cells; 3) a conserved hypothetical protein that is encoding by gene belonging to phage gene cluster in Synechococcus elongatus PCC 7942 genome; 4) a protein containing the VRR-NUC (virus-type replication-repair nuclease) domain present in restriction-modification enzymes involved in replication and DNA repair. The obtained results demonstrated that 2-nonanone may have different targets in Synechococcus elongatus PCC 7942 cells. Among them are proteins involved in the biogenesis and functioning of the cyanobacteria cell wall (Synpcc7942_1362, Synpcc7942_0351, Synpcc7942_0732) and protein participating in stress response at DNA restriction-modification level (Synpcc7942_0726). This paper is the first report about the genes that encode protein products, which can be affected by 2-nonanone" |
| Keywords: | 2-nonanone ABC-transporter DNA restriction-modification VOCs cell membranes genetic control ketone toxicity microorganisms resistant mutants transposon mutagenesis; |
| Notes: | "PubMed-not-MEDLINEKoksharova, Olga A Popova, Alexandra A Plyuta, Vladimir A Khmel, Inessa A eng 18-04-00375/the Russian Foundation for Basic Research/ Switzerland 2020/08/23 Microorganisms. 2020 Aug 13; 8(8):1234. doi: 10.3390/microorganisms8081234" |
