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Draft Genome Sequence of the Type Strain Lysobacter capsici VKM B-2533.

ABSTRACT: Lysobacter capsici VKM B-2533^T is a promising strain for isolation of new lytic agents. Here, we report a draft genome sequence of this strain, consisting of 131 scaffolds with a total length of 6,196,943 bp. The results obtained will aid in the discovery and study of biologically active compounds important for biomedicine.

SUBMITTER: Tarlachkov SV

PROVIDER: S-EPMC8407771 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Whole-Genome Sequencing of Lysobacter capsici VKM B-2533T and Lysobacter gummosus 10.1.1, Promising Producers of Lytic Agents.

Project description:Lysobacter capsici VKM B-2533T and Lysobacter gummosus 10.1.1 are promising strains for use in biomedicine as sources of new antimicrobial agents. Here, we report the whole-genome sequences of both strains (total lengths, 6,239,188 bp and 6,056,609 bp, respectively), obtained using the Illumina and Nanopore platforms.

| S-EPMC9476909 | biostudies-literature

Lytic potential of Lysobacter capsici VKM B-2533T: bacteriolytic enzymes and outer membrane vesicles.

Project description: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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Structural and Functional Characterization of β-lytic Protease from Lysobacter capsici VKM B-2533T.

Project description:The crystal structure of the Lysobacter capsici VKM B-2533T β-lytic protease (Blp), a medicinally promising antimicrobial enzyme, was first solved. Blp was established to possess a folding characteristic of the M23 protease family. The groove of the Blp active site, as compared with that of the LasA structural homologue from Pseudomonas aeruginosa, was found to have amino acid differences. Biochemical analysis revealed no differences in the optimal reaction conditions for manifesting Blp and LasA bacteriolytic activities. At the same time, Blp had a broader range of action against living and autoclaved target cells. The results suggest that the distinction in the geometry of the active site and the charge of amino acid residues that form the active site groove can be important for the hydrolysis of different peptidoglycan types in target cells.

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Lysobacter capsici strain:VKM B-2533

Project description:Lysobacter capsici strain:VKM B-2533 Genome sequencing and assembly

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Transcriptomic Analysis Followed by the Isolation of Extracellular Bacteriolytic Proteases from Lysobacter capsici VKM B-2533T.

Project description:The aim of the study was to search for, isolate and characterize new bacteriolytic enzymes that show promising potential for their use in medicine, agriculture and veterinary. Using a transcriptomic analysis, we annotated in Lysobacter capsici VKM B-2533T the genes of known bacteriolytic and antifungal enzymes, as well as of antibiotics, whose expression levels increased when cultivated on media conducive to the production of antimicrobial agents. The genes of the secreted putative bacteriolytic proteases were also annotated. Two new bacteriolytic proteases, Serp and Serp3, were isolated and characterized. The maximum bacteriolytic activities of Serp and Serp3 were exhibited at low ionic strength of 10 mM Tris-HCl, and high temperatures of, respectively, 80 °C and 70 °C. The pH optimum for Serp was 8.0; for Serp3, it was slightly acidic, at 6.0. Both enzymes hydrolyzed autoclaved cells of Micrococcus luteus Ac-2230T, Proteus vulgaris H-19, Pseudomonas aeruginosa and Staphylococcus aureus 209P. Serp also digested cells of Bacillus cereus 217. Both enzymes hydrolyzed casein and azofibrin. The newly discovered enzymes are promising for developing proteolytic antimicrobial drugs on their basis.

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β-Lytic Protease of Lysobacter capsici VKM B-2533T.

Project description:Bacteriolytic enzymes are promising antimicrobial agents for developing new-generation drugs. Recently, we have isolated a β-lytic protease (BlpLc) from the culture liquid of Lysobacter capsici VKM B-2533T. This BlpLc possesses a valuable property, not described for β-lytic proteases (Blps) earlier, of hydrolyzing living cells of Staphylococcus aureus 55 MRSA clinical isolate. This work phylogenetically characterized the BlpLc and investigated its properties. Analysis revealed a variability of pre-/pro-parts of Blp precursors. The mature BlpLc is the closest to the earlier annotated but not isolated Blp from Lysobacter sp. Root690. The biochemical characterization found conditions for the BlpLc general bacteriolytic activity relative to autoclaved S. aureus 209P cells to differ from that of earlier isolated Blp. Unexpected was the effect of serine (phenylmethylsulfonyl fluoride (PMSF)) and cysteine (p-chloromercuribenzoate (p-CMB)) protease inhibitors on BlpLc bacteriolytic and proteolytic activities. The specificity of BlpLc proteolytic action relative to hemoglobin, elastin, gelatin, collagen, azofibrin, myoglobin, ovalbumin, and ovamucoid was found. New types of peptide bonds-Gly-X, Ser-X, Lys-X, Ala-X, Val-X, Glu-X, and Phe-X-hydrolyzed by the enzyme in protein substrates were first revealed using MALDI-TOF. Turbidimetrically, the BlpLc was found to lyze living cells of S. aureus 209P, Micrococcus luteus B1819, and M. roseus B1236, which is important for expanding the enzyme's applied properties.

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The First Homologous Expression System for the β-Lytic Protease of Lysobacter capsici VKM B-2533T, a Promising Antimicrobial Agent.

Project description:A successful homologous expression system based on Lysobacter capsici VKM B-2533T and the plasmid pBBR1-MCS5 was first developed for a promising bacteriolytic enzyme of this bacterium, β-lytic protease (Blp). In the expression strains, blp gene expression under the regulation of the GroEL(A) and T5 promoters increased by 247- and 667-fold, respectively, as compared with the wild-type strain. After the cultivation of the expression strains L. capsici PGroEL(A)-blp and L. capsici PT5-blp, the Blp yield increased by 6.7- and 8.5-fold, respectively, with respect to the wild-type strain. The cultivation of the expression strain L. capsici PT5-blp was successfully scaled up. Under fermentation conditions the yield of the enzyme increased by 1.6-fold. The developed homologous system was used to express the gene of the bacteriolytic serine protease (Serp) of L. capsici VKM B-2533T. The expression of the serp gene in L. capsici PT5-serp increased by 585-fold. The developed homologous system for the gene expression of bacteriolytic Lysobacter enzymes is potentially biotechnologically valuable, and is promising for creating highly efficient expression strains.

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Draft Genome Sequence of FK506-Producing Streptomyces tsukubensis Strain VKM Ac-2618D.

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