Streptomyces boluensis sp. nov., isolated from lake sediment

Tokatlı, Ali; İdil, Önder; Veyisoglu, Aysel; Saygin, Hayrettin; Güven, Kıymet; Çetin, Demet; Şahi̇n, Nevzat

doi:10.1007/s00203-020-01901-3

Cited by 10 publications

(3 citation statements)

References 34 publications

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“…Hot springs have been comprehensively studied by researchers worldwide as a potential source of thermophilic bacteria. This type of extremophilic bacteria is considered a promising candidate for producing novel functional metabolites to address current global challenges, such as antibiotic resistance [31]. According to recent reports, there is emergent concern that antibiotic resistance could pose a greater threat to human life in the future, potentially surpassing the impact of cancer.…”

Section: Discussionmentioning

confidence: 99%

Unveiling Antibacterial Potential and Physiological Characteristics of Thermophilic Bacteria Isolated from a Hot Spring in Iran

Rafiee,

Jalili Tabaii,

Moradi

et al. 2024

Microorganisms

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The increasing worldwide demand for antimicrobial agents has significantly contributed to the alarming rise of antimicrobial resistance, posing a grave threat to human life. Consequently, there is a pressing need to explore uncharted environments, seeking out novel antimicrobial compounds that display exceptionally efficient capabilities. Hot springs harbor microorganisms possessing remarkable properties, rendering them an invaluable resource for uncovering groundbreaking antimicrobial compounds. In this study, thermophilic bacteria were isolated from Mahallat Hot Spring, Iran. Out of the 30 isolates examined, 3 strains exhibited the most significant antibacterial activities against Escherichia coli and Staphylococcus aureus. Furthermore, the supernatants of the isolated strains exhibited remarkable antibacterial activity, displaying notable resistance to temperatures as high as 75 °C for 30 min. It was determined that the two strains showed high similarity to the Bacillus genus, while strain Kh3 was classified as Saccharomonospora azurea. All three strains exhibited tolerance to NaCl. Bacillus strains demonstrated optimal growth at pH 5 and 40 °C, whereas S. azurea exhibited optimal growth at pH 9 and 45 °C. Accordingly, hot springs present promising natural reservoirs for the isolation of resilient strains possessing antibacterial properties, which can be utilized in disease treatment or within the food industry.

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Section: Discussionmentioning

confidence: 99%

Unveiling Antibacterial Potential and Physiological Characteristics of Thermophilic Bacteria Isolated from a Hot Spring in Iran

Rafiee,

Jalili Tabaii,

Moradi

et al. 2024

Microorganisms

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

“…Streptomycetes are ubiquitous, Gram-positive, filamentous actinomycetes that can be found in various environments, including lake sediment [2], alpine wetland soil [3], riverside silt [4] and wheat rhizosphere [5]. These aerobically growing bacteria can develop mycelium and produce abundant conidia for reproduction, with a DNA G+C content ranging from 69 to 73 mol% [2–5]. Streptomycetes are well-known for their abilities to produce a wide range of secondary metabolites, such as antibacterial and antifungal compounds, enzyme inhibitors and vitamins, many of which have been applied in medicine, agriculture and other fields [6].…”

Section: Introductionmentioning

confidence: 99%

Streptomyces beigongshangae sp. nov., isolated from baijiu fermented grains, could transform ginsenosides of Panax notoginseng

Liu,

Gu,

Shi

et al. 2024

International Journal of Systematic and Evolutionary Microbiology

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A Gram-stain-positive actinomycete, designated REN17T, was isolated from fermented grains of Baijiu collected from Sichuan, PR China. It exhibited branched substrate mycelia and a sparse aerial mycelium. The optimal growth conditions for REN17T were determined to be 28 °C and pH 7, with a NaCl concentration of 0 % (w/v). ll-Diaminopimelic acid was the diagnostic amino acid of the cell-wall peptidoglycan and the polar lipids were composed of phosphatidylethanolamine, phosphatidylinositol, an unidentified phospholipid, two unidentified lipids and four unidentified glycolipids. The predominant menaquinone was MK-9 (H2), MK-9 (H4), MK-9 (H6) and MK-9 (H8). The major fatty acids were iso-C16 : 0. The 16S rRNA sequence of REN17T was most closely related to those of Streptomyces apricus SUN 51T (99.8 %), Streptomyces liliiviolaceus BH-SS-21T (99.6 %) and Streptomyces umbirnus JCM 4521T (98.9 %). The digital DNA–DNA hybridization, average nucleotide identity and average amino acid identify values between REN17T and its closest replated strain, of S. apricus SUN 51T, were 35.9, 88.9 and 87.3 %, respectively. Therefore, REN17T represents a novel species within the genus Streptomyces, for which the name Streptomyces beigongshangae sp. nov. is proposed. The type strain is REN17T (=GDMCC 4.193T=JCM 34712T). While exploring the function of the strain, REN17T was found to possess the ability to transform major ginsenosides of Panax notoginseng (Burk.) F.H. Chen (Araliaceae) into minor ginsenoside through HPLC separation, which was due to the presence of β-glucosidase. The recombinant β-glucosidase was constructed and purified, which could produce minor ginsenosides of Rg3 and C-K. Finally, the enzymatic properties were characterized.

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Isolation of a broad spectrum antimicrobial producing thermophilic Bacillus and characterization of its antimicrobial protein

et al. 2021

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Streptomyces boluensis sp. nov., isolated from lake sediment

Cited by 10 publications

References 34 publications

Unveiling Antibacterial Potential and Physiological Characteristics of Thermophilic Bacteria Isolated from a Hot Spring in Iran

Unveiling Antibacterial Potential and Physiological Characteristics of Thermophilic Bacteria Isolated from a Hot Spring in Iran

Streptomyces beigongshangae sp. nov., isolated from baijiu fermented grains, could transform ginsenosides of Panax notoginseng

Isolation of a broad spectrum antimicrobial producing thermophilic Bacillus and characterization of its antimicrobial protein

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