Publications by authors named "Jung-sook Lee"
Strain CAU 1644 was isolated from sea sand at Ganghwa Island, Republic of Korea. The bacterium is aerobic, Gram-staining negative, yellow-colored, non-motile, catalase-positive, and rod-shaped. Cells of strain CAU 1644 grew at 20-40 °C and pH 6.
View Article and Find Full Text PDFMicrobial culture collections play a crucial role in the collection, maintenance, and distribution of quality-assured living microbial strains, along with their associated phenotypic and omics data. To enhance the find-able, accessible, interoperable, and re-usable (FAIR) data utilization of microbial resources, the World Data Center for Microorganisms (WDCM) has developed the Global Catalogue of Microorganisms (GCM) and the Global Catalogue of Type Strains (gcType). These platforms provide interactive interfaces for cataloging the holdings of collections, along with detailed annotations of type strain genomes and curated metadata, including ecosystems, growth conditions, and collection locations.
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- Microbes play a vital role in biotechnology, necessitating the preservation and management of diverse microbial resources through culture collections.
- These collections serve as repositories for various microorganisms, ensuring they are maintained and distributed for research, education, and industrial applications.
- Collaborative networks, such as the World Federation for Culture Collections and regional groups, are essential for supporting the long-term viability of these resources, especially as microbiome research continues to grow and presents new challenges in sample management.
Article Synopsis
- The gastrointestinal microbiota play a crucial role in human health, and dietary intake can influence its composition and metabolic functions.
- A study showed that different gut microbiome consortia can break down prebiotic dietary fibers, leading to varying production levels of short-chain fatty acids like acetic, propionic, and butyric acids.
- These short-chain fatty acids impact the growth and mucin secretion of intestinal cells, indicating that prebiotic fibers can be beneficially processed by the gut microbiome to support gut health.
A Gram-stain-negative, strictly aerobic, non-motile, rod-shaped, designated strain CAU 1642, was isolated from a Salicornia herbacea collected from a tidal flat in the Yellow Sea. Strain CAU 1642 grew optimally at pH 8.0 and 30 °C.
View Article and Find Full Text PDFA novel strictly anaerobic bacterium, strain JBNU-10, was isolated from BALB/c mouse feces. Cells of the strain JBNU-10 were Gram-stain positive, non-motile and rod-shaped. Optimum growth occurred at 37℃, with 1% (w/v) NaCl and at pH 7.
View Article and Find Full Text PDFA Gram-stain-negative, aerobic, rod-shaped, motile, flagellated bacterial strain, designated as CAU 1639, was isolated from the tidal flat sediment on the Yellow Sea in the Republic of Korea. Growth of the isolate was observed at 20-37 °C, at pH 5.0-10.
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- - The rise of obesity and overweight, particularly among children and adolescents, is a pressing societal concern that hasn't been effectively addressed despite known risk factors.
- - This study investigates the impact of environmental nanoplastic pollutants, specifically from polystyrene and polypropylene, on weight gain in mouse offspring whose mothers were exposed to these substances during pregnancy and breastfeeding.
- - Findings reveal that the exposure to nanoplastics leads to abnormal weight gain in offspring, linked to changes in maternal breast milk's lipid composition and gut microbiota in the young mice, suggesting that these pollutants can contribute to obesity in childhood.
A Gram-stain-positive, anaerobic, motile, and short rod-shaped bacterium, designated KGMB12511, was isolated from the feces of healthy Koreansubjects. Phylogenetic analysis based on the 16S rRNA gene sequence showed that strain KGMB12511 was closely related to Gordonibacter pamelaeae 7-10-1-b (95.2%).
View Article and Find Full Text PDFThe disparity of access to suitable social services for people from culturally diverse backgrounds is receiving increased attention. Coproduction between service users and providers has the potential as an approach to improve the cultural responsiveness of social services. What remains unknown is how social service organizations can facilitate and support coproduction with people from culturally diverse backgrounds.
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- * It thrives in specific conditions (optimum temperature of 37°C, pH 7) and produces acetic acid and isobutyric acid as major fermentation products, while also encoding genes related to complex polysaccharide utilization.
- * The strain has a genome size of about 3.2 million base pairs with a G+C content of 41.4%, and its phylogenetic similarity to related species indicates its novel classification status. *
A Gram-staining-positive, aerobic, non-spore-forming bacterium was isolated from coastal sand samples from Incheon in the Republic of Korea and designated as strain CAU 1645. The optimum conditions for growth were observed at 30 °C in growth media containing 1% (w/v) NaCl at pH 9.0.
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- The study focuses on a key group of bacteria in the human gut microbiome that has potential for creating treatments for gut diseases through microbiome engineering and live biotherapeutics.
- Researchers identified new signal peptides that improve protein transport within these bacteria, which is crucial for developing therapeutics.
- They also created an improved episomal plasmid system that enhances protein delivery and stability, while addressing the demand for antibiotic-free selection methods in clinical applications.
The rhizosphere microbial community is closely associated with plant disease by regulating plant growth, agricultural production, nutrient availability, plant hormone and adaptation to environmental changes. Therefore, it is very important to identify the rhizosphere microbes around plant roots and understand their functions. While studying the differences between the rhizosphere microbiota of healthy and diseased apple trees to find the cause of apple tree disease, we isolated a novel strain, designated as B3-10, from the rhizosphere soil of a healthy apple tree.
View Article and Find Full Text PDFJatrophihabitans cynanchi sp. nov., isolated from rhizosphere soil of Cynanchum wilfordii.
Antonie Van Leeuwenhoek
January 2024
A novel actinobacterial strain, SB3-54 was isolated from rhizosphere soil of Cynanchum wilfodill, Jaecheon, Chungcheongbuk-do, Republic of Korea. Cells of strain SB3-54 were Gram-stain-positive, aerobic, rod-shaped, and flagellated which formed pale yellow colonies on Reasoner's 2A (R2A) agar. Growth occurred at 15-30 °C (optimum 25 °C), pH 5-8 (optimum pH 7), and 0-2.
View Article and Find Full Text PDFsp. nov., isolated from a coastal dune, reclassification of as comb. nov., and emended description of the genus .
Int J Syst Evol Microbiol
December 2023
A Gram-stain-negative, aerobic, non-flagellated and coccoid or ovoid bacterial strain, BSSL-BM11, was isolated from sand of coastal dunes along the Yellow Sea of the Korean peninsula. Strain BSSL-BM11 grew optimally at 30 °C, at pH 7.0-8.
View Article and Find Full Text PDFTwo novel strains, SA3-5 and SA3-6, were isolated from a tidal flat (getbol) in the Republic of Korea. Strains SA3-5 and SA3-6 were subjected to polyphasic characterization to determine their taxonomic affiliations. Cells were Gram-stain-negative, aerobic, rod-shaped and motile by using peritrichous flagella.
View Article and Find Full Text PDFsp. nov., isolated from gut of marine sandworm () and emended description of the genus .
Int J Syst Evol Microbiol
September 2023
A novel, Gram-stain-negative, aerobic, motile, catalase- and oxidase-negative bacterial strain, designated A2M4, was isolated from the gut contents of a marine sandworm , collected from the eastern coast of the Republic of Korea. Strain A2M4 formed translucent circular colonies and showed rod-shaped cells with peritrichous flagella. Optimal growth of strain A2M4 occurred at 25 °C, pH 7.
View Article and Find Full Text PDFDescription of sp. nov., isolated from seawater.
Int J Syst Evol Microbiol
July 2023
A Gram-stain-negative, non-motile by gliding and moderately halophilic rod-shaped bacterium HN-2-9-2 was isolated from seawater in Tongyeong, Republic of Korea. The strain grew at concentrations of 0.5‒7 % (w/v) NaCl, at pH 5.
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- - The study investigates mucin-degrading (MD) bacteria and their connections to human health, revealing 54 and 296 specific genes linked to mucin catabolism through bioinformatics techniques.
- - Researchers analyzed metabolic pathways in MD bacteria and found that their unique metabolic features impact host immune cell signals and nutrient-dependent fermentation profiles.
- - The research suggests that dietary differences affect the abundance and function of MD bacteria, influencing gut health and immune responses in the host.
A Gram-stain-negative, aerobic, rod-shaped bacterium, designated as strain CAU 1638, was isolated from seaweed sediment collected in the Republic of Korea. The cells of strain CAU 1638 grew at 25-37 °C (optimum, 30 °C), at pH 6.0-7.
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- * Phylogenetic analysis shows that BC00092 is closely related to two known strains but has sufficient genetic differences to be considered a new species.
- * Due to its unique genetic characteristics, BC00092 is proposed as a novel species within its genus, named sp. nov., with strain BC00092 being the type strain.
Article Synopsis
- A new Gram-negative, non-motile bacterium named CAU 1643T was discovered in mudflat samples from Ganghwa Island, South Korea, characterized by its reddish-orange color and optimal growth conditions at 30°C, pH 9.0-9.5, and low salinity.
- Genetic analysis revealed that CAU 1643T is closely related to other species in the Algoriphagus genus, with 16S rRNA gene sequence similarities ranging from 96.2% to 97.9%, but it did not meet the threshold for being classified as the same species.
- Strain CAU 1643T has unique features including specific fatty acids, a major respiratory quin
The taxonomic position of strain EF45031, isolated from the Neungam Carbonate hot spring, was examined using the polyphasic taxonomic approach. Strain EF45031 shared the highest percentage of 16S rRNA gene sequence with Brachybacterium nesterenkovii CIP 104813 (97.7%).
View Article and Find Full Text PDFA novel actinobacterial strain, designated AGMB00827, was isolated from swine faeces. Strain AGMB00827 was obligately anaerobic, Gram-stain-positive, non-motile, non-spore-forming and rod-shaped bacterium. Comparative analyses based on the 16S rRNA gene and whole genome sequence revealed that strain AGMB00827 was affiliated to the genus Collinsella, and was most closely related to Collinsella vaginalis Marseille-P2666 (= KCTC 25056).
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