Journal of Microbiology

Hyun-Woo Oh

6 Articles

Phycicoccus ochangensis sp. nov., Isolated from Soil of a Potato Cultivation Field: Hyangmi Kim , Hyun-Woo Oh , Doo-Sang Park , Kang Hyun Lee , Sung Uk Kim , Hee-Moon Park , Kyung Sook Bae Bae; J. Microbiol. 2012;50(5):893-893.

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Abstract PDF: In the article by Kim et al. that appears in the Journal of Microbiology 2012; 50, 349-353. KCTC number on page 349 (abstract line 19) and page 353 (left paragraph line 32) should read as KCTC 19695 not KCTC 19694, and on page 353 (left paragraph line 33) should read as KCTC 19694 not KCTC 19695.

Phycicoccus ochangensis sp. nov., Isolated from Soil of a Potato Cultivation Field: Hyangmi Kim , Hyun-Woo Oh , Doo-Sang Park , Kang Hyun Lee , Sung Uk Kim , Hee-Moon Park , Kyung Sook Bae; J. Microbiol. 2012;50(2):349-353. Published online April 27, 2012; DOI: https://doi.org/10.1007/s12275-012-1206-6

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Two novel, Gram-positive, motile, coccal bacteria, strains L1b-b9T and B5a-b5, were isolated from a potato cultivation field in Ochang, Korea. These isolates grew at 10–45°C, pH 5.0–10.0, and in the presence of 8% (w/v) NaCl. The diagnostic diamino acid in the cell-wall peptidoglycan was mesodiaminopimelic acid. The major menaquinone was MK-8(H4) and the main cellular fatty acids were iso-C14:0, iso-C15:0, and anteiso-C15:0. Polar lipids in strain L1b-b9T consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol, and an unknown glyco-amino lipid. The G+C content of genomic DNA was 73.6 mol%. A phylogenetic analysis based on 16S rRNA gene sequences showed that strains L1b-b9T and B5a-b5 shared 99.36% similarity and formed a robust clade with the type species of the genus Phycicoccus. Strain L1b-b9T is related most closely to Phycicoccus cremeus V2M29T (97.52% 16S rRNA gene sequence similarity). On the basis of phylogenetic characteristics, the name Phycicoccus ochangensis sp. nov. is proposed for strain LIb-b9T (=KCTC 19694T =JCM 17595T).

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Huiling Tang, Xiaohui Chen, Mingsheng Chen, Xiaohong Li, Jianjing Jiang, Li Tuo, Feina Li
Current Microbiology.2023;[Epub] CrossRef
An Insight into the Endophytic Bacterial Community of Tomato after Spray Application of Propiconazole and Bacillus subtilis Strain NBRI-W9
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Methylobacterium dankookense sp. nov., Isolated from Drinking Water: Si-Won Lee , Hyun-Woo Oh , Kang-Hyun Lee , Tae-Young Ahn; J. Microbiol. 2009;47(6):716-720. Published online February 4, 2010; DOI: https://doi.org/10.1007/s12275-009-0126-6

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Abstract PDF

A pink-pigmented bacterium, designated SW08-7T was isolated from the drinking water of a water purifier. Cells were Gram-negative, rod-shaped, strictly aerobic, and non-spore-forming. It grew optimally at 25°C, pH 6~7. Phylogenetic analysis based on 16S rRNA gene sequence showed that strain SW08-7T belongs to the genus Methylobacterium. The highest 16S rRNA gene sequence similarities were found to Methylobacterium mesophilicum JCM 2829T (96.9%), Methylobacterium brachiatum B0021T (96.9%), Methylobacterium phyllosphaerae CBMB27T (96.6%), Methylobacterium radiotolerans JCM 2831T (96.6%), and Methylobacterium hispanicum GP34T (96.5%). DNA-DNA hybridization experiment revealed low-level (28.5%) of DNA- DNA relatedness between strain SW08-7T and Methylobacterium hispanicum. The genomic DNA G+C content was 68.9 mol% and the major isoprenoid quinone was Q-10. The major cellular fatty acid of strain SW08-7T was C18:1 ω7c (79.8±2.1%). Results of phylogenetic, phenotypic, and biochemical analyses revealed that strain SW08-7T could be classified as representing a novel species of genus Methylobacterium, for which the name Methylobacterium dankookense sp. nov. is proposed. The type strain is SW08-7T (=KCTC 22512T =DSM 22415T).

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Analysis of Bacterial Diversity in Water from the Han River Water Source Protection Area via a Pyrosequencing Assay
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Novel and efficient screening of PQQ high-yielding strains and subsequent cultivation optimization
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Emticicia sediminis sp. nov. isolated from sediment of a shallow stream
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Jeotgalibaca dankookensis gen. nov., sp. nov., a member of the family Carnobacteriaceae, isolated from seujeot (Korean traditional food)
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Flavihumibacter cheonanensis sp. nov., isolated from sediment of a shallow stream
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Paenibacillus camelliae sp. nov., Isolated from Fermented Leaves of Camellia sinensis: Hyun-Woo Oh , Byung-Chun Kim , Kang Hyun Lee , Do Young Kim , Doo-Sang Park , Hee-Moon Park , Kyung Sook Bae; J. Microbiol. 2008;46(5):530-534. Published online October 31, 2008; DOI: https://doi.org/10.1007/s12275-008-0233-9

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Abstract PDF

A novel bacterium, strain b11s-2T was isolated from Pu’er tea. The isolate was Gram-positive, endosporeforming motile rod that grew at 15~42°C and pH 6.0~10.2. The DNA G+C content was 48.3 mol%, the predominant isoprenoid quinone was MK-7, and the predominant cellular fatty acid was anteiso-C15:0 (54.2%) followed by C16:0 (15.5%) and iso-C16:0 (8.2%). The polar lipid pattern of b11s-2T was characterized by the presence of diphosphatidylglycerol, phosphatidylethanolamine, and phosphatidylglycerol. Phylogenetic analysis based on 16S rRNA gene sequence showed that the strain was affiliated within the Paenibacillaceae. The strain was most closely related to Paenibacillus granivorans A30T, with a similarity of 97.1%. Based on the phylogenetic and phenotypic characteristics of strain b11s-2T, the isolate is thought to represent a novel taxon in the genus Paenibacillus. The name Paenibacillus camelliae sp. nov. is proposed for the fermented tea isolate; the type strain is b11s-2T (= KCTC 13220T= CECT 7361T).

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Characterization of an Extracellular Lipase in Burkholderia sp. HY-10 Isolated from a Longicorn Beetle: Doo-Sang Park , Hyun-Woo Oh , Sun-Yeon Heo , Woo-Jin Jeong , Dong Ha Shin , Kyung Sook Bae , Ho-Young Park; J. Microbiol. 2007;45(5):409-417.; DOI: https://doi.org/2596 [pii]

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Abstract PDF: Burkholderia sp. HY-10 isolated from the digestive tracts of the longicorn beetle, Prionus insularis, produced an extracellular lipase with a molecular weight of 33.5 kDa estimated by SDS-PAGE. The lipase was purified from the culture supernatant to near electrophoretic homogenity by a one-step adsorption-desorption procedure using a polypropylene matrix followed by a concentration step. The purified lipase exhibited highest activities at pH 8.5 and 60°C. A broad range of lipase substrates, from C4 to C18 ρ-nitrophenyl esters, were hydrolyzed efficiently by the lipase. The most efficient substrate was ρ-nitrophenyl caproate (C6). A 2485 bp DNA fragment was isolated by PCR amplification and chromosomal walking which encoded two polypeptides of 364 and 346 amino acids, identified as a lipase and a lipase foldase, respectively. The N-terminal amino acid sequence of the purified lipase and nucleotide sequence analysis predicted that the precursor lipase was proteolytically modified through the secretion step and produced a catalytically active 33.5 kDa protein. The deduced amino acid sequence for the lipase shared extensive similarity with those of the lipase family I.2 of lipases from other bacteria. The deduced amino acid sequence contained two Cystein residues forming a disulfide bond in the molecule and three, well-conserved amino acid residues, Ser131, His330, and Asp308, which composed the catalytic triad of the enzyme.

A Culture-Based Study of the Bacterial Communities within the Guts of Nine Longicorn Beetle Species and their Exo-enzyme Producing Properties for Degrading Xylan and Pectin: Doo-Sang Park , Hyun-Woo Oh , Won-Jin Jeong , Hyangmi Kim , Ho-Yong Park , Kyung Sook Bae; J. Microbiol. 2007;45(5):394-401.; DOI: https://doi.org/2598 [pii]

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Abstract PDF: In this study, bacterial communities within the guts of several longicorn beetles were investigated by a culture-dependent method. A total of 142 bacterial strains were isolated from nine species of longicorn beetle, including adults and larvae. A comparison of their partial 16S rRNA gene sequences showed that most of the bacteria constituting the gut communities can typically be found in soil, plants and the intestines of animals, and approximately 10% were proposed as unreported. Phylogenetic analysis demonstrated that the bacterial species comprised 7 phyla, and approximately half were Gammaproteobacteria. Actinobacteria were the second most populous group (19%), followed by Firmicutes (13%) and Alphaproteobacteria (11%). Betaproteobacteria, Flavobacteria, and Acidobacteria were minor constituents. The taxonomic compositions of the isolates were variable according to the species of longicorn beetle. Particularly, an abundance of Actinobacteria existed in Moechotypa diphysis and Mesosa hirsute, which eat broadleaf trees; however, no Actinobacteria were isolated from Corymbia rubra and Monochamus alternatus, which are needle-leaf eaters. Considerable proportions of xylanase and pectinase producing bacteria in the guts of the longicorn beetles implied that the bacteria may play an important role in the digestion of woody diets. Actinobacteria and Gammaproteobacteria were the dominant xylanase producers in the guts of the beetles.

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