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Journal of Microbiology / the Microbiological Society of Korea

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https://www.readbyqxmd.com/read/29948830/interdependence-between-iron-acquisition-and-biofilm-formation-in-pseudomonas-aeruginosa
#1
REVIEW
Donghoon Kang, Natalia V Kirienko
Bacterial biofilms remain a persistent threat to human healthcare due to their role in the development of antimicrobial resistance. To combat multi-drug resistant pathogens, it is crucial to enhance our understanding of not only the regulation of biofilm formation, but also its contribution to bacterial virulence. Iron acquisition lies at the crux of these two subjects. In this review, we discuss the role of iron acquisition in biofilm formation and how hosts impede this mechanism to defend against pathogens...
June 14, 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29948829/halomonas-tibetensis-sp-nov-isolated-from-saline-lakes-on-tibetan-plateau
#2
Hui-Bin Lu, Peng Xing, Lei Zhai, Dorji Phurbu, Qian Tang, Qing-Long Wu
Strains pyc13T and ZGT13 were isolated from Lake Pengyan and Lake Zigetang on Tibetan Plateau, respectively. Both strains were Gram-negative, catalase- and oxidase-positive, aerobic, rod-shaped, nonmotile, and nonflagellated bacteria. Phylogenetic analysis based on 16S rRNA gene sequences showed that strains pyc13T and ZGT13 belong to the genus Halomonas, with Halomonas alkalicola 56-L4-10aEnT as their closest neighbor, showing 97.4% 16S rRNA gene sequence similarity. The predominant respiratory quinone of both strains was Q-9, with Q-8 as a minor component...
June 14, 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29948828/phylogenetic-comparison-of-epstein-barr-virus-genomes
#3
REVIEW
Su Jin Choi, Seok Won Jung, Sora Huh, Hyosun Cho, Hyojeung Kang
Technologies used for genome analysis and whole genome sequencing are useful for us to understand genomic characterization and divergence. The Epstein-Barr virus (EBV) is an oncogenic virus that causes diverse diseases such as Burkitt's lymphoma (BL), nasopharyngeal carcinoma (NPC), Hodgkin's lymphoma (HL), and gastric carcinoma (GC). EBV genomes found in these diseases can be classified either by phases of EBV latency (type-I, -II, and -III latency) or types of EBNA2 sequence difference (type-I EBV, type-II EBV or EBV-1, EBV-2)...
June 14, 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29948827/temporal-and-spatial-impact-of-spartina-alterniflora-invasion-on-methanogens-community-in-chongming-island-china
#4
Xue Ping Chen, Jing Sun, Yi Wang, Heng Yang Zhang, Chi Quan He, Xiao Yan Liu, Nai Shun Bu, Xi-En Long
Methane production by methanogens in wetland is recognized as a significant contributor to global warming. Spartina alterniflora (S. alterniflora), which is an invasion plant in China's wetland, was reported to have enormous effects on methane production. But studies on shifts in the methanogen community in response to S. alterniflora invasion at temporal and spatial scales in the initial invasion years are rare. Sediments derived from the invasive species S. alterniflora and the native species Phragmites australis (P...
June 14, 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29948825/taxonomic-description-and-draft-genome-of-pseudomonas-sediminis-sp-nov-isolated-from-the-rhizospheric-sediment-of-phragmites-karka
#5
Pratiksha Behera, Madhusmita Mahapatra, Arman Seuylemezian, Parag Vaishampayan, V Venkata Ramana, Neetha Joseph, Amaraja Joshi, Yogesh Shouche, Mrutyunjay Suar, Ajit K Pattnaik, Gurdeep Rastogi
The taxonomic position of a Gram-stain-negative, rod-shaped bacterial strain, designated PI11T , isolated from the rhizospheric sediment of Phragmites karka was characterized using a polyphasic approach. Strain PI11T could grow optimally at 1.0% NaCl concentration with pH 7.0 at 30°C and was positive for oxidase and catalase but negative for hydrolysis of starch, casein, and esculin ferric citrate. Phylogenetic analysis of 16S rRNA gene sequences indicated that the strain PI11T belonged to the genus Pseudomonas sharing the highest sequence similarities with Pseudomonas indoloxydans JCM 14246T (99...
June 14, 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29948824/bacillus-ferrooxidans-sp-nov-an-iron-ii-oxidizing-bacterium-isolated-from-paddy-soil
#6
Guo-Wei Zhou, Xiao-Ru Yang, Jian-Qiang Su, Bang-Xiao Zheng, Yong-Guan Zhu
An endospore-forming bacterium, designated YT-3T , was isolated from a paddy soil in Yingtan, Jiangxi, China. Cells of strain YT-3T were Gram-positive, rod-shaped, facultative anaerobic, catalase, and oxidase positive. The optimum growth temperature and pH were 30°C (ranged from 15 to 50°C) and 6.5-7.0 (ranged from 3 to 11), respectively. Analysis of the 16S rRNA gene sequence showed that strain YT-3T was affiliated to the genus Bacillus and displayed the highest similarity to that of Bacillus drentensis JCM 21707T (98...
June 14, 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29948823/pedobacter-aquicola-sp-nov-isolated-from-freshwater
#7
Yochan Joung, Hye-Jin Jang, Miri Park, Jaeho Song, Jang-Cheon Cho
A non-motile, pink-pigmented bacterial strain designated IMCC25679T , was isolated from freshwater Lake Chungju of Korea. Phylogenetic trees based on 16S rRNA gene sequences showed that the strain IMCC25679T formed a lineage within the genus Pedobacter. The strain IMCC25679T was closely related to Pedobacter daechungensis Dae 13T (96.4% sequence similarity), Pedobacter rivuli HME8457T (95.3%) and Pedobacter lentus DS-40T (94.3%). The major fatty acids of IMCC-25679T were iso-C15:0 , iso-C16:0 and summed feature 3 (comprising C16:1 ω6c and/or C16:1 ω7c)...
June 14, 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29956124/antifungal-activity-of-3-acetylbenzamide-produced-by-actinomycete-wa23-4-4-from-the-intestinal-tract-of-periplaneta-americana
#8
Xia Fang, Juan Shen, Jie Wang, Zhi-Li Chen, Pei-Bin Lin, Zhi-Yu Chen, Lin-Yan Liu, Huan-Xiong Zeng, Xiao-Bao Jin
Actinomycetes are well-known for producing numerous bioactive secondary metabolites. In this study, primary screening by antifungal activity assay found one actinomycete strain WA23-4-4 isolated from the intestinal tract of Periplaneta americana that exhibited broad spectrum antifungal activity. 16S rDNA gene analysis of strain WA23-4-4 revealed close similarity to Streptomyces nogalater (AB045886) with 86.6% sequence similarity. Strain WA23-4-4 was considered as a novel Streptomyces and the 16s rDNA sequence has been submitted to GenBank (accession no...
July 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29956123/hymenobacter-jeollabukensis-sp-nov-isolated-from-soil
#9
Leonid N Ten, Young Eun Han, Kyeung Il Park, In-Kyu Kang, Jeung-Sul Han, Hee-Young Jung
A Gram-stain-negative, non-motile, rod-shaped, aerobic bacterial strain, designated 1-3-3-8T , was isolated from soil and characterized taxonomically using a polyphasic approach. Comparative 16S rRNA gene sequence analysis showed that strain 1-3-3-8T belongs to the family Cytophagaceae of phylum Bacteroidetes and is most closely related to Hymenobacter paludis KBP-30T (96.8% similarity), Hymenobacter ocellatus Myx2105T (96.8%), Hymenobacter coalescens WW84T (95.6%), and Hymenobacter deserti ZLB-3T (95.4%). The G + C content of the genomic DNA of strain 1-3-3-8T was 63...
July 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29956122/flavihumibacter-profundi-sp-nov-isolated-from-eutrophic-freshwater-sediment
#10
Ting-Ting Ren, Chun-Zhi Jin, Feng-Jie Jin, Taihua Li, Chang-Jin Kim, Hee-Mock Oh, Hyung-Gwan Lee, Long Jin
A Gram-stain-positive, aerobic, non-motile, non-spore-forming, and rod-shaped bacterium, designated strain CHu64-6-1T , was isolated from a 67-cm-long sediment core collected from the Daechung Reservoir at a water depth of 17-m in Daejeon, Republic of Korea. Comparative 16S rRNA gene sequence studies placed the new isolate in the class Sphingobacteriia, and the isolate is notably most closely related to Flavihumibacter sediminis CJ663T (98.1% similarity), Flavihumibacter solisilvae 3-3T (97.8%), Flavihumibacter petaseus T41T (97...
July 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29948826/proposal-of-three-novel-species-of-soil-bacteria-variovorax-ureilyticus-variovorax-rhizosphaerae-and-variovorax-robiniae-in-the-family-comamonadaceae
#11
Tuan Manh Nguyen, Ngoc Hoang Trinh, Jaisoo Kim
Three novel bacterial strains (UCM-2T , UCM-G28T , and UCM-G35T ) were obtained while isolating soil bacteria for the development of antibiotics. Cells of these strains were Gram-negative, non-spore forming, motile by means of a single flagellum, and rod shaped. In all strains, the predominant isoprenoid quinone was ubiquinone-8 (Q-8). Cells contained C16:0 , summed feature 3 (C16:1 ω7c and/or C16:1 ω6c), summed feature 8 (C18:1 ω7c and/or C18:1 ω6c), and C17:0 cyclo as the major fatty acids, and C10:0 3-OH as the major hydroxy fatty acid...
July 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29858833/analysis-of-ie62-mutations-found-in-varicella-zoster-virus-vaccine-strains-for-transactivation-activity
#12
Hyemin Ko, Gwang Myeong Lee, Ok Sarah Shin, Moon Jung Song, Chan Hee Lee, Young Eui Kim, Jin-Hyun Ahn
Live attenuated vaccine strains have been developed for Varicella-Zoster virus (VZV). Compared to clinically isolated strains, the vaccine strains contain several non-synonymous mutations in open reading frames (ORFs) 0, 6, 31, 39, 55, 62, and 64. In particular, ORF62, encoding an immediate-early (IE) 62 protein that acts as a transactivator for viral gene expression, contains six non-synonymous mutations, but whether these mutations affect transactivation activity of IE62 is not understood. In this study, we investigated the role of non-synonymous vaccine-type mutations (M99T, S628G, R958G, V1197A, I1260V, and L1275S) of IE62 in Suduvax, a vaccine strain isolated in Korea, for transactivation activity...
June 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29858832/colistin-resistance-in-enterobacter-spp-isolates-in-korea
#13
Yoon-Kyoung Hong, Ji-Young Lee, Kwan Soo Ko
We investigated the colistin resistance rate among 356 Enterobacter spp. clinical isolates from eight hospitals in Korea. Antibiotic susceptibility testing was performed by broth microdilution. While 51 of 213 (23.9%) Enterobacter cloacae isolates were colistin-resistant, only six of 143 (4.2%) E. aerogenes isolates showed resistance. We also identified the skip well phenotype in eight E. cloacae and three E. aerogenes isolates. Multilocus sequence typing for E. cloacae and randomly amplified polymorphic DNA analysis and enterobacterial repetitive intergenic consensus PCR for E...
June 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29858831/photosynthetic-and-biochemical-responses-of-the-freshwater-green-algae-closterium-ehrenbergii-meneghini-conjugatophyceae-exposed-to-the-metal-coppers-and-its-implication-for-toxicity-testing
#14
Hui Wang, Vinitha Ebenezer, Jang-Seu Ki
The freshwater green algae Closterium is sensitive to water quality, and hence has been suggested as ideal organisms for toxicity testing. In the present study, we evaluated the photosynthetic and biochemical responses of C. ehrenbergii to the common contaminants, coppers. The 72 h median effective concentrations (EC50 ) of CuSO4 and CuCl2 on the test organism were calculated to be 0.202 mg/L and 0.245 mg/L, respectively. Exposure to both coppers considerably decreased pigment levels and photosynthetic efficiency, while inducing the generation of reactive oxygen species (ROS) in cells with increased exposure time...
June 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29858830/diversity-of-a-mating-type-in-lentinula-edodes-and-mating-type-preference-in-the-cultivated-strains
#15
Byeongsuk Ha, Sinil Kim, Minseek Kim, Yoon Jung Moon, Yelin Song, Jae-San Ryu, Hojin Ryu, Hyeon-Su Ro
Diversity of A mating type in Lentinula edodes has been assessed by analysis of A mating loci in 127 strains collected from East Asia. It was discovered that hypervariable sequence region with an approximate length of 1 kb in the A mating locus, spanning 5' region of HD2-intergenic region-5' region of HD1, could represent individual A mating type as evidenced by comprehensive mating analysis. The sequence analysis revealed 27 A mating type alleles from 96 cultivated strains and 48 alleles from 31 wild strains...
June 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29858829/metagenomic-analysis-reveals-the-prevalence-and-persistence-of-antibiotic-and-heavy-metal-resistance-genes-in-wastewater-treatment-plant
#16
Sachin Kumar Gupta, Hanseob Shin, Dukki Han, Hor-Gil Hur, Tatsuya Unno
The increased antibiotic resistance among microorganisms has resulted into growing interest for investigating the wastewater treatment plants (WWTPs) as they are reported to be the major source in the dissemination of antibiotic resistance genes (ARGs) and heavy metal resistance genes (HMRGs) in the environment. In this study, we investigated the prevalence and persistence of ARGs and HMRGs as well as bacterial diversity and mobile genetic elements (MGEs) in influent and effluent at the WWTP in Gwangju, South Korea, using high-throughput sequencing based metagenomic approach...
June 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29858828/root-associated-bacteria-influencing-mycelial-growth-of-tricholoma-matsutake-pine-mushroom
#17
Seung-Yoon Oh, Young Woon Lim
Tricholoma matsutake is an ectomycorrhizal fungus usually associated with Pinus densiflora in South Korea. Fruiting bodies (mushrooms) of T. matsutake are economically important due to their attractive aroma; yet, T. matsutake is uncultivatable and its habitat is rapidly being eradicated due to global climate change. Root-associated bacteria can influence the growth of ectomycorrhizal fungi that co-exist in the host rhizosphere and distinctive bacterial communities are associated with T. matsutake. In this study, we investigated how these bacterial communities affect T...
June 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29858827/paenibacillus-albilobatus-sp-nov-isolated-from-acidic-soil-on-jeju-island
#18
Jae-Won Lee, Ye-Eun Kim, Myung-Suk Kang, Ki-Eun Lee, Eun-Young Lee, Soo-Je Park
A rod-shaped, white color colony with lobate architectures, strain h2T was isolated from a moderately acidic soil on Jeju Island, Republic of Korea. Comparative analysis of the 16S rRNA gene sequence showed that the strain h2T is closely related to Paenibacillus relictisesami DSM 25385T (97.4%, 16S rRNA gene sequence similarity), Paenibacillus azoreducens KACC 11244T (97.2%), and Paenibacillus cookii LMG 18419T (97.0%). DNA-DNA hybridization indicated that the strain h2T has relatively low levels of DNA-DNA relatedness with respect to P...
June 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29858826/lysobacter-pedocola-sp-nov-a-novel-species-isolated-from-korean-soil
#19
Jun Hyeong Jang, Dongwook Lee, Taegun Seo
A Gram-negative, yellow-pigmented bacterial strain, designated IPC6T , was isolated from soil in an arid region of Goyang-si (Gyeonggi-do, South Korea). Cells were strictly aerobic, non-spore-forming, rod-shaped. The strain grew within a temperature range of 10-42°C (optimum, 30°C) and pH of 5.0-11.0 (optimum, pH 8.0) in the presence of 0-2% (w/v) NaCl. Phylogenetically, the novel strain was closely related to members of the Lysobacter genus based on 16S rRNA sequence similarity, and showed the highest sequence similarity to Lysobacter niastensis KACC 11588T (98...
June 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29858825/antimicrobial-actions-of-dual-oxidases-and-lactoperoxidase
#20
REVIEW
Demba Sarr, Eszter Tóth, Aaron Gingerich, Balázs Rada
The NOX/DUOX family of NADPH oxidases are transmembrane proteins generating reactive oxygen species as their primary enzymatic products. NADPH oxidase (NOX) 1-5 and Dual oxidase (DUOX) 1 and 2 are members of this family. These enzymes have several biological functions including immune defense, hormone biosynthesis, fertilization, cell proliferation and differentiation, extracellular matrix formation and vascular regulation. They are found in a variety of tissues such as the airways, salivary glands, colon, thyroid gland and lymphoid organs...
June 2018: Journal of Microbiology / the Microbiological Society of Korea
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