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Jung-Hyun Lee 17 Articles
Fibroblast Growth Factor 11 Inhibits Hepatitis B Virus Gene Expression Through FXRα Suppression
Mi So Seong , Jeong Ah Jang , Ye Rim Jeong , Ye Bin Kim , Yi Yi Kyaw , Hee Jeong Kong , Jung-Hyun Lee , JaeHun Cheong
J. Microbiol. 2023;61(7): 693-702.
DOI: https://doi.org/10.1007/s12275-023-00065-1
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AbstractAbstract
Fibroblast growth factor 11 (FGF11) is a member of the intracellular FGF family, which shows different signal transmission compared with other FGF superfamily members. The molecular function of FGF11 is not clearly understood. In this study, we identified the inhibitory effect of FGF11 on hepatitis B virus (HBV) gene expression through transcriptional suppression. FGF11 decreased the mRNA and protein expression of HBV genes in liver cells. While the nuclear receptor FXRα1 increased HBV promoter transactivation, FGF11 decreased the FXRα-mediated gene induction of the HBV promoter by the FXRα agonist. Reduced endogenous levels of FXRα by siRNA and the dominant negative mutant protein (aa 1–187 without ligand binding domain) of FXRα expression indicated that HBV gene suppression by FGF11 is dependent on FXRα inhibition. In addition, FGF11 interacts with FXRα protein and reduces FXRα protein stability. These results indicate that FGF11 inhibits HBV replicative expression through the liver cell-specific transcription factor, FXRα, and suppresses HBV promoter activity. Our findings may contribute to the establishment of better regimens for the treatment of chronic HBV infections by including FGF11 to alter the bile acid mediated FXR pathway.
Expression and purification of intracrine human FGF 11 and study of its FGFR-dependent biological activity
Kyeong Won Lee , Young Jun An , Janet Lee , Ye-Eun Jung , In Young Ko , Jonghwa Jin , Ji Hoon Park , Won Kyu Lee , Kiweon Cha , Sun-Shin Cha , Jung-Hyun Lee , Hyung-Soon Yim
J. Microbiol. 2022;60(11):1086-1094.   Published online November 1, 2022
DOI: https://doi.org/10.1007/s12275-022-2406-3
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AbstractAbstract
Fibroblast growth factor 11 (FGF11) is one of intracrine FGFs (iFGFs), which function within cells. Unlike canonical FGFs, FGF11 remains intracellularly and plays biological roles in FGF receptor (FGFR)-independent manner. Here, we established an expression system of recombinant FGF11 proteins in E. coli and investigated whether the extracellular administration of FGF11 can activate cellular signaling. Human FGF11 has two isoforms, FGF11a and FGF11b, depending on the presence of nuclear localization sequences (NLSs) in the N-terminus. Because these two isoforms are unstable, we prepared an FGF11a-Mut by substituting three cysteine residues in the NLS with serine and FGF11b-ΔC with C-terminal truncation. The introduction of mutation in the NLS improved the solubility of FGF11 prepared from E. coli. Exogenous addition of FGF11b and FGF11b-ΔC to BALB3T3 increased cell proliferation, while FGF11a-Mut exerted no effect. FGF11b-ΔC showed higher cell proliferation activity and FGFR signaling than FGF11b. The cell-proliferating activities of FGF11b and FGF11b-ΔC were blocked by an FGFR1 inhibitor or a recombinant FGFR1, confirming the FGFR1- dependent extracellular activity of FGF11b. The analysis of circular dichroism suggested that the C-terminus of FGF11 has an α-helical structure, which may affect its interaction with FGFR1. These results suggest that the N-and C-terminus of recombinant FGF11 are involved in the activation of FGFR1. The above results provide novel insights into the function and mechanism of FGF11 that may aid the development of useful ligands for FGFR regulation.

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  • Glycosylation of FGF/FGFR: An underrated sweet code regulating cellular signaling programs
    Aleksandra Gędaj, Paulina Gregorczyk, Dominika Żukowska, Aleksandra Chorążewska, Krzysztof Ciura, Marta Kalka, Natalia Porębska, Łukasz Opaliński
    Cytokine & Growth Factor Reviews.2024; 77: 39.     CrossRef
  • FGF homologous factors are secreted from cells to induce FGFR‐mediated anti‐apoptotic response
    Martyna Biadun, Martyna Sochacka, Radoslaw Karelus, Karolina Baran, Aleksandra Czyrek, Jacek Otlewski, Daniel Krowarsch, Lukasz Opalinski, Malgorzata Zakrzewska
    The FASEB Journal.2023;[Epub]     CrossRef
  • FGF/FGFR1 system in paired breast tumor-adjacent and tumor tissues, associations with mammographic breast density and tumor characteristics
    Öykü Boraka, Marie Klintman, Johan Vallon-Christersson, Sophia Zackrisson, Per Hall, Signe Borgquist, Ann H. Rosendahl
    Frontiers in Oncology.2023;[Epub]     CrossRef
Thermococcus indicus sp. nov., a Fe(III)-reducing hyperthermophilic archaeon isolated from the Onnuri Vent Field of the Central Indian Ocean ridge
Jae Kyu Lim , Yun Jae Kim , Jhung-Ahn Yang , Teddy Namirimu , Sung-Hyun Yang , Mi-Jeong Park , Yong Min Kwon , Hyun Sook Lee , Sung Gyun Kang , Jung-Hyun Lee , Kae Kyoung Kwon
J. Microbiol. 2020;58(4):260-267.   Published online April 1, 2020
DOI: https://doi.org/10.1007/s12275-020-9424-9
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AbstractAbstract
A strictly anaerobic, dissimilatory Fe(III)-reducing hyperthermophilic archaeon, designated as strain IOH1T, was isolated from a new deep-sea hydrothermal vent (Onnuri Vent Field) area in the Central Indian Ocean ridge. Strain IOH1T showed > 99% 16S rRNA gene sequence similarity with Thermococcus celericrescens TS2T (99.4%) and T. siculi DSM 12349T (99.2%). Additional three species T. barossii SHCK-94T (99.0%), T. celer Vu13T (98.8%), and T. piezophilus (98.6%) showed > 98.6% of 16S rRNA gene sequence similarity, however, the maximum OrthoANI value is 89.8% for the genome of T. celericrescens TS2T. Strain IOH1T cells are coccoid, 1.2–1.8 μm in diameter, and motile by flagella. Growth was at 70–82°C (optimum 80°C), pH 5.4–8.0 (optimum pH 6.0) with 2–4% (optimum 3%) NaCl. Growth of strain IOH1T was enhanced by starch, pyruvate, D(+)-maltose and maltodextrin as a carbon sources, and elemental sulfur as an electron acceptor; clearly different from those of related species T. celecrescens DSM 17994T and T. siculi DSM 12349T. Strain IOH1T, T. celercrescence DSM 17994T, and T. siculi DSM 12349T reduced soluble Fe(III)-citrate present in the medium, whereas the amount of total cellular proteins increased with the concomitant accumulation of Fe(II). We determined a circular chromosome of 2,234 kb with an extra-chromosomal archaeal plasmid, pTI1, of 7.7 kb and predicted 2,425 genes. The DNA G + C content was 54.9 mol%. Based on physiological properties, phylogenetic, and genome analysis, we proposed that strain IOH1T (= KCTC 15844T = JCM 39077T) is assigned to a new species in the genus Thermococcus and named Thermococcus indicus sp. nov.

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  • Macrobenthic communities in the polymetallic nodule field, Indian Ocean, based on multicore and box core analysis
    Santosh Gaikwad, Sabyasachi Sautya, Samir Damare, Maria Brenda Luzia Mascarenhas-Pereira, Vijayshree Gawas, Jayesh Patil, Mandar Nanajkar, Sadiq Bukhari
    Frontiers in Marine Science.2024;[Epub]     CrossRef
  • Thermococcus argininiproducens sp. nov., an arginine biosynthesis archaeal species isolated from the Central Indian Ocean ridge
    Yeong-Jun Park, Jae Kyu Lim, Yun Jae Kim, Sung-Hyun Yang, Hyun Sook Lee, Sung Gyun Kang, Jung-Hyun Lee, Youngik Yang, Kae Kyoung Kwon
    International Journal of Systematic and Evolutionary Microbiology .2023;[Epub]     CrossRef
  • Spatial comparison and temporal evolution of two marine iron-rich microbial mats from the Lucky Strike Hydrothermal Field, related to environmental variations
    Aina Astorch-Cardona, Mathilde Guerre, Alain Dolla, Valérie Chavagnac, Céline Rommevaux
    Frontiers in Marine Science.2023;[Epub]     CrossRef
  • Formate and hydrogen in hydrothermal vents and their use by extremely thermophilic methanogens and heterotrophs
    James F. Holden, Harita Sistu
    Frontiers in Microbiology.2023;[Epub]     CrossRef
  • Microbiome and environmental adaption mechanisms in deep-sea hydrothermal vents
    WeiShu ZHAO, Xiang XIAO
    SCIENTIA SINICA Vitae.2022;[Epub]     CrossRef
  • Limitations of microbial iron reduction under extreme conditions
    Sophie L Nixon, Emily Bonsall, Charles S Cockell
    FEMS Microbiology Reviews.2022;[Epub]     CrossRef
  • Valid publication of new names and new combinations effectively published outside the IJSEM
    Aharon Oren, George M. Garrity
    International Journal of Systematic and Evolutionary Microbiology .2021;[Epub]     CrossRef
  • Thermococcus aciditolerans sp. nov., a piezotolerant, hyperthermophilic archaeon isolated from a deep-sea hydrothermal vent chimney in the Southwest Indian Ridge
    Xue-Gong Li, Hong-Zhi Tang, Wei-Jia Zhang, Xiao-Qing Qi, Zhi-Guo Qu, Jun Xu, Long-Fei Wu
    International Journal of Systematic and Evolutionary Microbiology.2021;[Epub]     CrossRef
  • Microorganisms from deep-sea hydrothermal vents
    Xiang Zeng, Karine Alain, Zongze Shao
    Marine Life Science & Technology.2021; 3(2): 204.     CrossRef
Paradesulfovibrio onnuriensis gen. nov., sp. nov., a chemolithoautotrophic sulfate-reducing bacterium isolated from the Onnuri vent field of the Indian Ocean and reclassification of Desulfovibrio senegalensis as Paradesulfovibrio senegalensis comb. nov.
Yun Jae Kim , Jhung-Ahn Yang , Jae Kyu Lim , Mi-Jeong Park , Sung-Hyun Yang , Hyun Sook Lee , Sung Gyun Kang , Jung-Hyun Lee , Kae Kyoung Kwon
J. Microbiol. 2020;58(4):252-259.   Published online February 27, 2020
DOI: https://doi.org/10.1007/s12275-020-9376-0
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AbstractAbstract
An anaerobic, rod-shaped, mesophilic, chemolithoautotrophic, sulfate-reducing bacterial strain IOR2T was isolated from a newly found deep-sea hydrothermal vent (OVF, Onnuri Vent Field) area in the central Indian Ocean ridge (11°24􍿁88􍿂􀁇 S 66°25􍿁42􍿂􀁇E, 2021 m water depth). The 16S rRNA gene sequence analysis revealed that the strain IOR2T was most closely related to Desulfovibrio senegalensis BLaC1T (96.7%). However, it showed low similarity with the members of the family Desulfovibrionaceae, such as Desulfovibrio tunisiensis RB22T (94.0%), D. brasiliensis LVform1T (93.9%), D. halophilus DSM 5663T (93.7%), and Pseudodesulfovibrio aespoeensis Aspo-2T (93.2%). The strain IOR2T could grow at 23– 42°C (optimum 37°C), pH 5.0–8.0 (optimum pH 7.0) and with 0.5–6.5% (optimum 3.0%) NaCl. The strain could use lactate, pyruvate, H2, and glycerol as electron donors and sulfate, thiosulfate, and sulfite as electron acceptors. The major fatty acids of the strain IOR2T were iso-C15:0, iso-C17:0, anteiso- C15:0, and summed feature 9 (C16:0 methyl/iso-C17:1ω9c). Both the strains IOR2T and BLaC1T could grow with CO2 and H2 as the sole sources of carbon and energy, respectively. Genomic evidence for the Wood-Ljungdahl pathway in both the strains reflects chemolithoautotrophic growth. The DNA G + C content of the strain IOR2T and BLaC1T was 58.1–60.5 mol%. Based on the results of the phylogenetic and physiologic studies, Paradesulfovibrio onnuriensis gen. nov., sp. nov. with the type strain IOR2T (= KCTC 15845T = MCCC 1K04559T) was proposed to be a member of the family Desulfovibrionaceae. We have also proposed the reclassification of D. senegalensis as Paradesulfovibrio senegalensis comb. nov.

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  • Sulfate-Reducing Bacteria Isolated from an Oil Field in Kazakhstan and a Description of Pseudodesulfovibrio karagichevae sp. nov.
    Salimat K. Bidzhieva, Tatyana P. Tourova, Denis S. Grouzdev, Salima R. Samigullina, Diyana S. Sokolova, Andrey B. Poltaraus, Alexander N. Avtukh, Vera M. Tereshina, Andrey V. Mardanov, Nurlan S. Zhaparov, Tamara N. Nazina
    Microorganisms.2024; 12(12): 2552.     CrossRef
  • Sulfur fertilization integrated with soil redox conditions reduces Cd accumulation in rice through microbial induced Cd immobilization
    Quan Zhang, Hai-Fei Chen, Dao-You Huang, Xiao-Bin Guo, Chao Xu, Han-Hua Zhu, Bo Li, Tong-Tong Liu, Ren-Wei Feng, Qi-Hong Zhu
    Science of The Total Environment.2022; 824: 153868.     CrossRef
  • Pseudodesulfovibrio sediminis sp. nov., a mesophilic and neutrophilic sulfate-reducing bacterium isolated from sediment of a brackish lake
    Ayaka Takahashi, Hisaya Kojima, Miho Watanabe, Manabu Fukui
    Archives of Microbiology.2022;[Epub]     CrossRef
  • Diversity and biogenesis contribution of sulfate-reducing bacteria in arsenic-contaminated soils from realgar deposits
    Xianbin Zhu, Liyuan Chen, Hongzhong Pan, Lei Wang, Xun Zhang, Dan Wang
    Environmental Science and Pollution Research.2022; 29(21): 31110.     CrossRef
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    Jaeho Song, Juchan Hwang, Ilnam Kang, Jang-Cheon Cho
    Scientific Reports.2021;[Epub]     CrossRef
  • Desulfomarina profundi gen. nov., sp. nov., a novel mesophilic, hydrogen-oxidizing, sulphate-reducing chemolithoautotroph isolated from a deep-sea hydrothermal vent chimney
    Yurina Hashimoto, Akihiro Tame, Shigeki Sawayama, Junichi Miyazaki, Ken Takai, Satoshi Nakagawa
    International Journal of Systematic and Evolutionary Microbiology.2021;[Epub]     CrossRef
  • Pseudodesulfovibrio mercurii sp. nov., a mercury-methylating bacterium isolated from sediment
    Cynthia C. Gilmour, Ally Bullock Soren, Caitlin M. Gionfriddo, Mircea Podar, Judy D. Wall, Steven D. Brown, Joshua K. Michener, Maria Soledad Goñi Urriza, Dwayne A. Elias
    International Journal of Systematic and Evolutionary Microbiology .2019;[Epub]     CrossRef
Isolation, cultivation, and genome analysis of proteorhodopsincontaining SAR116-clade strain Candidatus Puniceispirillum marinum IMCC1322
Junhak Lee , Kae Kyoung Kwon , Seung-Il Lim , Jaeho Song , Ah Reum Choi , Sung-Hyun Yang , Kwang-Hwan Jung , Jung-Hyun Lee , Sung Gyun Kang , Hyun-Myung Oh , Jang-Cheon Cho
J. Microbiol. 2019;57(8):676-687.   Published online June 14, 2019
DOI: https://doi.org/10.1007/s12275-019-9001-2
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AbstractAbstract
Strain IMCC1322 was isolated from a surface water sample from the East Sea of Korea. Based on 16S rRNA analysis, IMCC1322 was found to belong to the OCS28 sub-clade of SAR116. The cells appeared as short vibrioids in logarithmicphase culture, and elongated spirals during incubation with mitomycin or in aged culture. Growth characteristics of strain IMCC1322 were further evaluated based on genomic information; proteorhodopsin (PR), carbon monoxide dehydrogenase, and dimethylsulfoniopropionate (DMSP)-utilizing enzymes. IMCC1322 PR was characterized as a functional retinylidene protein that acts as a light-driven proton pump in the cytoplasmic membrane. However, the PR-dependent phototrophic potential of strain IMCC1322 was only observed under CO-inhibited and nutrient-limited culture conditions. A DMSP-enhanced growth response was observed in addition to cultures grown on C1 compounds like methanol, formate, and methane sulfonate. Strain IMCC1322 cultivation analysis revealed biogeochemical processes characteristic of the SAR116 group, a dominant member of the microbial community in euphotic regions of the ocean. The polyphasic taxonomy of strain IMCC1322 is given as Candidatus Puniceispirillum marinum, and was confirmed by chemotaxonomic tests, in addition to 16S rRNA phylogeny and cultivation analyses.

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    Atsushi Kobiyama, Jonaira Rashid, Md. Shaheed Reza, Yuri Ikeda, Yuichiro Yamada, Toshiaki Kudo, Nanami Mizusawa, Saki Yanagisawa, Daisuke Ikeda, Shigeru Sato, Takehiko Ogata, Kazuho Ikeo, Shinnosuke Kaga, Shiho Watanabe, Kimiaki Naiki, Yoshimasa Kaga, Sat
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    Journal of Microbiology.2020; 58(6): 463.     CrossRef
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    Suhyun Kim, Miri S. Park, Jaeho Song, Ilnam Kang, Jang-Cheon Cho
    Journal of Microbiology.2020; 58(11): 893.     CrossRef
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    Konstantinos T. Konstantinidis, Ramon Rosselló‐Móra, Rudolf Amann
    Environmental Microbiology.2020; 22(3): 819.     CrossRef
  • Expanding the Diversity of Bacterioplankton Isolates and Modeling Isolation Efficacy with Large-Scale Dilution-to-Extinction Cultivation
    Michael W. Henson, V. Celeste Lanclos, David M. Pitre, Jessica Lee Weckhorst, Anna M. Lucchesi, Chuankai Cheng, Ben Temperton, J. Cameron Thrash, Robert M. Kelly
    Applied and Environmental Microbiology.2020;[Epub]     CrossRef
Metagenomic analysis reveals the contribution of anaerobic methanotroph-1b in the oxidation of methane at the Ulleung Basin, East Sea of Korea
Jin-Woo Lee , Kae Kyoung Kwon , Jang-Jun Bahk , Dong-Hun Lee , Hyun Sook Lee , Sung Gyun Kang , Jung-Hyun Lee
J. Microbiol. 2016;54(12):814-822.   Published online November 26, 2016
DOI: https://doi.org/10.1007/s12275-016-6379-y
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AbstractAbstract
We have previously identified a sulfate methane transition zone (SMTZ) within the methane hydrate-bearing sediment in the Ulleung Basin, East Sea of Korea, and the presence of ANME-1b group in the sediment has been shown by phylogenetic analysis of a 16S rRNA gene. Herein, we describe taxonomic and functional profiling in the SMTZ sample by metagenomic analysis, comparing with that of surface sediment. Metagenomic sequences of 115 Mbp and 252 Mbp were obtained from SMTZ and surface sediments, respectively. The taxonomic profiling using BLASTX against the SEED within MG-RAST showed the prevalence of methanogens (19.1%), such as Methanosarcinales (12.0%) and Methanomicrobiales (4.1%) predominated within the SMTZ metagenome. A number of 185,200 SMTZ reads (38.9%) and 438,484 surface reads (62.5%) were assigned to functional categories, and methanogenesis-related reads were statistically significantly overrepresented in the SMTZ metagenome. However, the mapping analysis of metagenome reads to the reference genomes, most of the sequences of the SMTZ metagenome were mapped to ANME-1 draft genomes, rather than those of methanogens. Furthermore, the two copies of the methyl-coenzyme M reductase gene (mcrA) segments of the SMTZ metagenome were clustered with ANME-1b in the phylogenetic cluster. These results indicate that ANME- 1b reads were miss-annotated to methanogens due to limitation of database. Many of key genes necessary for reverse methanogenesis were present in the SMTZ metagenome, except for N5,N10-methenyl-H4MPT reductase (mer) and CoBCoM heterodisulfide reductase subunits D and E (hdrDE). These data suggest that the ANME-1b represents the primary player the anaerobic methane oxidation in the SMTZ, of the methane hydrate-bearing sediment at the Ulleung Basin, East Sea of Korea.

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  • Methane seepage intensity distinguish microbial communities in sediments at the Mid-Okinawa Trough
    Youzhi Xin, Nengyou Wu, Zhilei Sun, Hongmei Wang, Ye Chen, Cuiling Xu, Wei Geng, Hong Cao, Xilin Zhang, Bin Zhai, Dawei Yan
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Abyssisolibacter fermentans gen. nov. sp. nov., isolated from deep sub-seafloor sediment
Wonduck Kim , Jung-Hyun Lee , Kae Kyoung Kwon
J. Microbiol. 2016;54(5):347-352.   Published online April 20, 2016
DOI: https://doi.org/10.1007/s12275-016-6048-1
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AbstractAbstract
A Gram-staining-negative, thin rod-shaped, anaerobic bacterium designated MCWD3T was isolated from sediment of the deep sea in Ulleung Basin, East Sea, Korea. The ranges of temperature, pH and NaCl for growth of this strain were 15– 40°C (optimum 29°C), 5.0–10.0 (optimum pH 6.5), and 1–5%, respectively. The major fatty acids were iso-C15:0 (30%) and iso-C15:0 dimethyl acetal (17%). The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, and unidentified aminophospholipids, phospholipids, and aminolipids. The fermentation product from yeast extract was acetate. Phylogenetic analysis based on 16S rRNA genes indicated that the isolate was related to Sporosalibacterium faouarense (92.8% sequence identity), Clostridiisalibacter paucivorans (92.6%), and Brassicibacter mesophilus (92.4%). However, the isolate was differentiated from these genera by both physiological and chemotaxonomical properties. On the basis of a polyphasic taxonomic analysis, we propose that MCWD3T represents a novel taxon with the name Abyssisolibacter fermentans gen. nov. sp. nov.

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  • Vibrio ostreae sp. nov., a novel gut bacterium isolated from a Yellow Sea oyster
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  • Alkalibacter rhizosphaerae sp. nov., a CO-utilizing bacterium isolated from tidal flat sediment, and emended description of the genus Alkalibacter
    Teddy Namirimu, Jihyun Yu, Jhung-Ahn Yang, Sung-Hyun Yang, Yun Jae Kim, Kae Kyoung Kwon
    International Journal of Systematic and Evolutionary Microbiology .2022;[Epub]     CrossRef
  • Anaerosacchariphilus polymeriproducens gen. nov., sp. nov., an anaerobic bacterium isolated from a salt field
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    The Korean Journal of Microbiology.2016; 52(2): 183.     CrossRef
Characterization of Hyperthermostable Fructose-1,6-Bisphosphatase from Thermococcus onnurineus NA1
Yeol Gyun Lee , Sung Gyun Kang , Jung-Hyun Lee , Seung Il Kim , Young-Ho Chung
J. Microbiol. 2010;48(6):803-807.   Published online January 9, 2011
DOI: https://doi.org/10.1007/s12275-010-0377-2
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AbstractAbstract
To understand the physiological functions of thermostable fructose-1,6-bisphosphatase (TNA1-Fbp) from Thermococcus onnurineus NA1, its recombinant enzyme was overexpressed in Escherichia coli, purified, and the enzymatic properties were characterized. The enzyme showed maximal activity for fructose-1,6- bisphosphate at 95°C and pH 8.0 with a half-life (t1/2) of about 8 h. TNA1-Fbp had broad substrate specificities for fructose-1,6-bisphosphate and its analogues including fructose-1-phosphate, glucose-1-phosphate, and phosphoenolpyruvate. In addition, its enzyme activity was increased five-fold by addition of 1 mM Mg2+, while Li+ did not enhance enzymatic activity. TNA1-Fbp activity was inhibited by ATP, ADP, and phosphoenolpyruvate, but AMP up to 100 mM did not have any effect. TNA1-Fbp is currently defined as a class V fructose-1,6-bisphosphatase (FBPase) because it is very similar to FBPase of Thermococcus kodakaraensis KOD1 based on sequence homology. However, this enzyme shows a different range of substrate specificities. These results suggest that TNA1-Fbp can establish new criterion for class V FBPases.

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  • Pcal_0111, a highly thermostable bifunctional fructose-1,6-bisphosphate aldolase/phosphatase from Pyrobaculum calidifontis
    Iram Aziz, Naeem Rashid, Raza Ashraf, Qamar Bashir, Tadayuki Imanaka, Muhammad Akhtar
    Extremophiles.2017; 21(3): 513.     CrossRef
  • Identification of a novel ligand binding site in phosphoserine phosphatase from the hyperthermophilic archaeon Thermococcus onnurineus
    Tae‐Yang Jung, Yae‐Sel Kim, Byoung‐Ha Oh, Euijeon Woo
    Proteins: Structure, Function, and Bioinformatics.2013; 81(5): 819.     CrossRef
  • Proteome Analyses of Hydrogen-producing Hyperthermophilic Archaeon Thermococcus onnurineus NA1 in Different One-carbon Substrate Culture Conditions
    Yoon-Jung Moon, Joseph Kwon, Sung-Ho Yun, Hye Li Lim, Min-Sik Kim, Sung Gyun Kang, Jung-Hyun Lee, Jong-Soon Choi, Seung Il Kim, Young-Ho Chung
    Molecular & Cellular Proteomics.2012; 11(6): M111.015420.     CrossRef
NOTE] Nomenclature of ISCR1 Elements Capable of Mobilizing Antibiotic Resistance Genes Present in Complex Class 1 Integrons
Seung Ghyu Sohn , Jae Jin Lee , Jae Seok Song , Jung Hun Lee , Ha Ik Sun , Kwang Seung Park , Il Kwon Bae , Jung-Hyun Lee , Byeong Chul Jeong , Sang Hee Lee
J. Microbiol. 2009;47(4):514-516.   Published online September 9, 2009
DOI: https://doi.org/10.1007/s12275-009-0054-5
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AbstractAbstract
The dissemination of many antibiotic resistance genes has arisen among members of the family Enterobacteriaceae. The dissemination mechanism of these antibiotic resistance genes is closely linked with insertion sequence common region 1 (ISCR1). Thus, caution must be taken in clinical settings to prevent further dissemination of these antibiotic resistance genes. A nomenclature system of ISCR1 variants, important for the antibiotic resistance dissemination, was proposed. The proposed system can designate all ISCR1 variants on the basis of the detection time and by considering amino-acid substitution(s) compared with ISCR1a. This nomenclature system of ISCR1 variants can be applied to 19 groups (ISCR1 to ISCR19) of the ISCR family and help some researchers to correctly designate new ISCR subgroups.

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  • Molecular Characteristics of Carbapenem-Resistant Gram-Negative Bacteria in Southern China
    Fen Zheng, Jingjing Sun, Cancan Cheng, Yongyu Rui
    Microbial Drug Resistance.2015; 21(2): 178.     CrossRef
  • Novel ISCR1-linked resistance genes found in multidrug-resistant Gram-negative bacteria in southern China
    Fengping Wang, Kuihai Wu, Jingjing Sun, Qian Wang, Qing Chen, Shouyi Yu, Yongyu Rui
    International Journal of Antimicrobial Agents.2012; 40(5): 404.     CrossRef
  • Gene flow, mobile genetic elements and the recruitment of antibiotic resistance genes into Gram-negative pathogens
    Hatch W. Stokes, Michael R. Gillings
    FEMS Microbiology Reviews.2011; 35(5): 790.     CrossRef
Monitoring Nutrient Impact on Bacterial Community Composition during Bioremediation of Anoxic PAH-Contaminated Sediment
Myungsu Kim , Seung Seob Bae , Mijin Seol , Jung-Hyun Lee , Young-Sook Oh
J. Microbiol. 2008;46(6):615-623.   Published online December 24, 2008
DOI: https://doi.org/10.1007/s12275-008-0097-z
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AbstractAbstract
Marine harbor sediments are frequently polluted with significant amount of polycyclic aromatic hydrocarbons (PAHs) some of which are naturally toxic, recalcitrant, mutagenic, and carcinogenic. To stimulate biodegradation of PAHs in PAH-contaminated sediments collected from near Gwangyang Bay, Korea, lactate was chosen as a supplementary carbonaceous substrate. Sediment packed into 600 ml air-tight jar was either under no treatment condition or lactate amended condition (1%, w/v). Microbial community composition was monitored by bacteria-specific and archaea-specific PCR-terminal restriction fragment length polymorphism (T-RFLP), in addition to measuring the residual PAH concentration. Results showed that lactate amendment enhanced biodegradation rate of PAHs in the sediment by 4 to 8 times, and caused a significant shift in archaebacterial community in terms of structure and diversity with time. Phylogenetic analysis of 23 archaeal clones with distinctive RFLP patterns among 288 archaeal clones indicated that majority of the archaeal members were closest to unculturable environmental rDNA clones from hydrocarbon-contaminated and/or methanogenesis-bearing sediments. Lactate amendment led to the enrichment of some clones that were most closely related to PAH-degrading Methanosarcina species. These results suggest a possible contribution of methanogenic community to PAH degradation and give us more insights on how to effectively remediate PAH-contaminated sediments.

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  • Effects of electron acceptors and donors on anaerobic biodegradation of PAHs in marine sediments
    Qingguo Chen, Zhenzhen Li, Yu Chen, Mei Liu, Qiao Yang, Baikang Zhu, Jun Mu, Lijuan Feng, Zhi Chen
    Marine Pollution Bulletin.2024; 199: 115925.     CrossRef
  • Electrical current generation from a continuous flow macrophyte biocathode sediment microbial fuel cell (mSMFC) during the degradation of pollutants in urban river sediment
    Felix Tetteh Kabutey, Jing Ding, Qingliang Zhao, Philip Antwi, Frank Koblah Quashie
    Environmental Science and Pollution Research.2020; 27(28): 35364.     CrossRef
  • Application of in situ Solid-Phase Microextraction on Mediterranean Sponges for Untargeted Exometabolome Screening and Environmental Monitoring
    Barbara Bojko, Bora Onat, Ezel Boyaci, Eleftheria Psillakis, Thanos Dailianis, Janusz Pawliszyn
    Frontiers in Marine Science.2019;[Epub]     CrossRef
  • Effect of carbonyl cyanide m-chlorophenylhydrazone (CCCP) on microbial activity and polycyclic aromatic hydrocarbons (PAH) degradation in contaminated river sediments
    G. Patricia Johnston, Z. Kalik, C. G. Johnston
    Environmental Earth Sciences.2016;[Epub]     CrossRef
  • Effects of polycyclic aromatic hydrocarbons on microbial community structure and PAH ring hydroxylating dioxygenase gene abundance in soil
    Przemyslaw Sawulski, Nicholas Clipson, Evelyn Doyle
    Biodegradation.2014; 25(6): 835.     CrossRef
  • Anthracene biodegradation under nitrate-reducing condition and associated microbial community changes
    Ying Wang, Rui Wan, Shuying Zhang, Shuguang Xie
    Biotechnology and Bioprocess Engineering.2012; 17(2): 371.     CrossRef
  • Molecular characterization of phenanthrene-degrading methanogenic communities in leachate-contaminated aquifer sediment
    S. Y. Zhang, Q. F. Wang, S. G. Xie
    International Journal of Environmental Science and Technology.2012; 9(4): 705.     CrossRef
  • Increment in Anaerobic Hydrocarbon Degradation Activity of Halic Bay Sediments via Nutrient Amendment
    Mustafa Kolukirik, Orhan Ince, Bahar K. Ince
    Microbial Ecology.2011; 61(4): 871.     CrossRef
  • Revealing archaeal diversity patterns and methane fluxes in Admiralty Bay, King George Island, and their association to Brazilian Antarctic Station activities
    C.R. Nakayama, E. Kuhn, A.C.V. Araújo, P.C. Alvalá, W.J. Ferreira, R.F. Vazoller, V.H. Pellizari
    Deep Sea Research Part II: Topical Studies in Oceanography.2011; 58(1-2): 128.     CrossRef
  • Bioremediation of marine sediments contaminated by hydrocarbons: Experimental analysis and kinetic modeling
    Francesca Beolchini, Laura Rocchetti, Francesco Regoli, Antonio Dell’Anno
    Journal of Hazardous Materials.2010; 182(1-3): 403.     CrossRef
Removal of Contaminating TEM-la β-Lactamase Gene from Removal of Contaminating TEM-la β-Lactamase Gene from
Jae Seok Song , Jung Hun Lee , Jung-Hyun Lee , Byeong Chul Jeong , Won-Keun Lee , Sang Hee Lee
J. Microbiol. 2006;44(1):126-128.
DOI: https://doi.org/2326 [pii]
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AbstractAbstract
This study confirms that Taq DNA polymerase could be contaminated with the blaTEM-1a gene. It also proposes two different methods that could be used to overcome DNA contamination: (i) DNase I treatment prior to PCR amplification; and (ii) the use of a highly purified Taq DNA polymerase which was devoid of detectable contamination.
Molecular Characterization of TEM-type [beta]-Lactamases Identified in Cold-Seep Sediments of Edison Seamount (South of Lihir Island, Papua New Guinea)
Jae Seok Song , Jeong Ho Jeon , Jung Hun Lee , Seok Hoon Jeong , Byeong Chul Jeong , Sang-Jin Kim , Jung-Hyun Lee , Sang Hee Lee
J. Microbiol. 2005;43(2):172-178.
DOI: https://doi.org/2165 [pii]
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AbstractAbstract
To determine the prevalence and genotypes of [beta]-lactamases among clones of a metagenomic library from the cold-seep sediments of Edison seamount (10,000 years old), we performed pulse-field gel electrophoresis, antibiotic susceptibility testing, pI determination, and DNA sequencing analysis. Among the 8,823 clones of the library, thirty clones produced [beta]-lactamases and had high levels of genetic diversity. Consistent with minimum inhibitory concentration patterns, we found that five (16.7%) of thirty clones produced an extended-spectrum [beta]-lactamase. 837- and 259-bp fragments specific to bla_TEM genes were amplified, as determined by banding patterns of PCR amplification with designed primers. TEM-1 was the most prevalent [beta]-lactamase and conferred resistance to ampicillin, piperacillin, and cephalothin. TEM-116 had a spectrum that was extended to ceftazidime, cefotaxime, and aztreonam. The resistance levels conferred by the pre-antibiotic era alleles of TEM-type [beta]-lactamases were essentially the same as the resistance levels conferred by the TEM-type alleles which had been isolated from clinically resistant strains of bacteria of the antibiotic era. Our first report on TEM-type [beta]-lactamases of the pre-antibiotic era indicates that TEM-type [beta]-lactamases paint a picture in which most of the diversity of the enzymes may not be the result of recent evolution, but that of ancient evolution.
Purification and Characterization of NADPH-Dependent Cr(VI) Reductase from Escherichia coli ATCC 33456
Woo-Chul Bae , Han-Ki Lee , Young-Chool Choe , Deok-Jin Jahng , Sang-Hee Lee , Sang-Jin Kim , Jung-Hyun Lee , Byeong-Chul Jeong
J. Microbiol. 2005;43(1):21-27.
DOI: https://doi.org/2143 [pii]
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AbstractAbstract
A soluble Cr(VI) reductase was purified from the cytoplasm of Escherichia coli ATCC 33456. The molecular mass was estimated to be 84 and 42 kDa by gel filtration and SDS-polyacrylamide gel electrophoresis, respectively, indicating a dimeric structure. The pI was 4.66, and optimal enzyme activity was obtained at pH 6.5 and 37^oC. The most stable condition existed at pH 7.0. The purified enzyme used both NADPH and NADH as electron donors for Cr(VI) reduction, while NADPH was the better, conferring 61% higher activity than NADH. The K_m values for NADPH and NADH were determined to be 47.5 and 17.2 umol, and the V_max values 322.2 and 130.7 umol Cr(VI) min^-1mg^-1 protein, respectively. The activity was strongly inhibited by N-ethylmalemide, Ag^2+, Cd^2+, Hg^2+, and Zn^2+. The antibody against the enzyme showed no immunological cross reaction with those of other Cr(VI) reducing strains.
Isolation and Identification of Biofilm-Forming Marine Bacteria on Glass Surfaces in Dae-Ho Dike, Korea
Kae Kyoung Kwon , Hyun Sang Lee , Sung-Young Jung , Joung-Han Yim , Jung-Hyun Lee , Hong Kum Lee
J. Microbiol. 2002;40(4):260-266.
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AbstractAbstract
Bacterial strains were isolated from biofilms formed on glass slides submerged in seawater in Dae-Ho Dike. Eight strains showing fast attaching ability were selected and identified. Their exopolysaccharide(EPS)-producing ability and EPS properties were characterized. Based on Microlog System, 4 among the 8 strains were identified as Micrococcus luteus and the rest were Bacillus thuringiensis, Bacillus megaterium, Staphylococcus saprophyticus and Agrobacterium vitis. A. vitis was reidentified as Sulfitobacter pontiacus based on 16S rDNA sequence data. The amount of water-soluble EPS produced by the 8 strains ranged from 0.114 to 1.329 g·l^-1 and the productivity was negatively correlated with the cell biomass. The molecular weight of the produced EPS ranged from 0.38 to 25.19x 10^4 Da. Glucose and galactose were ubiquitous sugar components. Mannose, ribose, and xylose were also major sugar components. The molecular weight and composition of the EPS showed strain-specific variation.
Microbial Symbiosis in Marine Sponges
Yoo Kyung Lee , Jung-Hyun Lee , Hong Kum Lee
J. Microbiol. 2001;39(4):254-264.
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AbstractAbstract
Sponges are host organisms for various symbiotic microorganisms such as archaea, bacteria, cyanobacteria and microalgae. Sponges are also sources of a wide variety of useful natural products like cytotoxins, antifouling agents, antibiotics, and anti-inflammatory and antiviral compounds. Symbiotic microorganisms in sponges can be sources of various natural products, because metabolites previously ascribed to sponges have recently been demonstrated to be biosynthesized by symbionts. If a symbiotic microorganism from which some natural products are derived can be cultured, the microorganism could be used in a mass production of the bioactive compounds. We summarize recent research on isolation and cultivation of sponge-symbiotic microorganisms and the symbiotic relationship.
Purification and Characterization of Chitinase from a Marine Bacterium, Vibrio sp. 98CJ11027
Shin Hye Park , Jung-Hyun Lee , Hong Kum Lee
J. Microbiol. 2000;38(4):224-229.
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AbstractAbstract
Chitin-degrading marine bacterial strain 98CJ11027 was isolated from bryozoa from the coastal area of Cheju Island, Korea, and identified as a member of the genus Vibrio. The molecular mass of the main extracellular chitinase (chitinase I), purified from strain 98CJ11027, was estimated to be 98 kDa. The optimal condition for chitinase I activity is pH 6.0 and 45 C. The activity was inhibited by Fe^+2 and Cu^+2. Chitinase I displayed the hydrolysis type of chitobiosidase and catalyzed reversed hydrolysis leading to the synthesis of tetraacetylchitotetraose.
Bacterial Diversity of Culturable Isolates from Seawater and a Marine Coral, Plexauridae sp., near Mun-Sum, Cheju-Island
Jung-Hyun Lee , Hyun-Hee Shin , Deuk-Soo Lee , Kae Kyung Kwon , Sang-Jin Kim , Hong Kum Lee
J. Microbiol. 1999;37(4):193-199.
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AbstractAbstract
Fifty-eight strains showing different colony morphological characteristics on various media were isolated from marine coral (Plexauridae sp.) and ambient seawater near Mun-Sum, Cheju-Island in 1998. Bacterial diversity was studies by phylogenetic analysis of the partial 16S rRNA gene sequences. All isolates representing the bacterial domain included affiliates of the high G+C (59%) and los G+C (3%) subdivision of Gram positive bacteria, and the alpha (33%) and gamma (5%) subdivision of the Proteobacteria. The 16S rDNA sequence similarity of the isolates was in the 88.3 to 100% range (average, 95.6%) to reported sequence data. In the comparison of the isolates from marine coarl and ambient seawater, more diverse groups belonging to alpha-proteobacteria were preferentially obtained from seawater.
Jung-Hyun Lee 1 Article
The Role of Extracellular Vesicles in Pandemic Viral Infections
Woosung Shim, Anjae Lee, Jung-Hyun Lee
J. Microbiol. 2024;62(6):419-427.   Published online June 25, 2024
DOI: https://doi.org/10.1007/s12275-024-00144-x
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AbstractAbstract
Extracellular vesicles (EVs), of diverse origin and content, are membranous structures secreted by a broad range of cell types. Recent advances in molecular biology have highlighted the pivotal role of EVs in mediating intercellular communication, facilitated by their ability to transport a diverse range of biomolecules, including proteins, lipids, DNA, RNA and metabolites. A striking feature of EVs is their ability to exert dual effects during viral infections, involving both proviral and antiviral effects. This review explores the dual roles of EVs, particularly in the context of pandemic viruses such as HIV-1 and SARS-CoV-2. On the one hand, EVs can enhance viral replication and exacerbate pathogenesis by transferring viral components to susceptible cells. On the other hand, they have intrinsic antiviral properties, including activation of immune responses and direct inhibition of viral infection. By exploring these contrasting functions, our review emphasizes the complexity of EV-mediated interactions in viral pathogenesis and highlights their potential as targets for therapeutic intervention. The insights obtained from investigating EVs in the context of HIV-1 and SARS-CoV-2 provide a deeper understanding of viral mechanisms and pathologies, and offer a new perspective on managing and mitigating the impact of these global health challenges.

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  • Differential Impact of Spike Protein Mutations on SARS-CoV-2 Infectivity and Immune Evasion: Insights from Delta and Kappa Variants
    Tae-Hun Kim, Sojung Bae, Jinjong Myoung
    Journal of Microbiology and Biotechnology.2024; 34(12): 2506.     CrossRef

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