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  • Title: Lytic potential of Lysobacter capsici VKM B-2533T: bacteriolytic enzymes and outer membrane vesicles.
    Author: Afoshin AS, Kudryakova IV, Borovikova AO, Suzina NE, Toropygin IY, Shishkova NA, Vasilyeva NV.
    Journal: Sci Rep; 2020 Jun 19; 10(1):9944. PubMed ID: 32561806.
    Abstract:
    Recent recurrent outbreaks of bacterial resistance to antibiotics have shown the critical need to identify new lytic agents to combat them. The species Lysobacter capsici VKM B-2533T possesses a potent antimicrobial action against a number of bacteria, fungi and yeasts. Its activity can be due to the impact of bacteriolytic enzymes, antibiotics and peptides. This work isolated four homogeneous bacteriolytic enzymes and a mixture of two proteins, which also had a bacteriolytic activity. The isolates included proteins identical to L. enzymogenes α- and β-lytic proteases and lysine-specific protease. The proteases of 26 kDa and 29 kDa and a protein identified as N-acetylglycosaminidase had not been isolated in Lysobacter earlier. The isolated β-lytic protease digested live methicillin-resistant staphylococcal cells with high efficiency (minimal inhibitory concentration, 2.85 μg/mL). This property makes the enzyme deserving special attention. A recombinant β-lytic protease was produced. The antimicrobial potential of the bacterium was contributed to by outer membrane vesicles (OMVs). L. capsici cells were found to form a group of OMVs responsible for antifungal activity. The data are indicative of a significant antimicrobial potential of this bacterium that requires thorough research.
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