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Journal of Microbiology / the Microbiological Society of Korea

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https://www.readbyqxmd.com/read/28432541/genome-characteristics-of-the-proteorhodopsin-containing-marine-flavobacterium-polaribacter-dokdonensis-dsw-5
#1
Kiyoung Yoon, Ju Yeon Song, Min-Jung Kwak, Soon-Kyeong Kwon, Jihyun F Kim
Bacteria in the genus Polaribacter, belonging to the family Flavobacteriaceae, are typically isolated from marine environments. Polaribacter dokdonensis DSW-5, the type strain of the species, is a Gram-negative bacterium isolated from the East Sea of Korea. Whole genome shotgun sequencing was performed with the HiSeq 2000 platform and paired-end reads were generated at 188-fold coverage. The sequencing reads were assembled into two contigs with a total length of 3.08 Mb. The genome sequences of DSW-5 contain 2,776 proteincoding sequences and 41 RNA genes...
April 22, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28429169/nocardioides-suum-sp-nov-isolated-from-the-air-environment-in-an-indoor-pig-farm
#2
Siwon Lee, Wonseok Lee, Hyen-Mi Chung, Sangjung Park
A bacterial strain PBT33-2(T) was isolated from the air environment in an indoor pig farm. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain PBT33-2(T) belonged to the genus Nocardioides in the phylum Actinobacteria, and was most closely related to Nocardioides daphnia D287(T) in a maximum-likelihood and neighbor-joining phylogenetic trees. Strain PBT33-2(T) shared 95.3% sequence identity with N. daphnia D287(T). However, the highest sequence similarity was shown with N. sediminis MSL-01(T) (96...
April 20, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28429168/bedaquiline-susceptibility-test-for-totally-drug-resistant-tuberculosis-mycobacterium-tuberculosis
#3
Ji-Chan Jang, Yong-Gyun Jung, Jungil Choi, Hyunju Jung, Sungweon Ryoo
This study aimed to provide information that bedaquilline is significantly effective for treatment of totally drug resistant (TDR) Mycobacterium tuberculosis that shows resistant to all first- and second-line drugs-using an innovative disc agarose channel (DAC) system. Time-lapse images of single bacterial cells under culture conditions with different concentrations of bedaquiline were analysed by image processing software to determine minimum inhibitory concentrations (MICs). Bedaquiline inhibited the growth of TDR M...
April 20, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28429167/corynebacterium-defluvii-sp-nov-isolated-from-sewage
#4
Qiu-Li Yu, Zheng-Fei Yan, Xin He, Feng-Hua Tian, Chuan-Wen Jia, Chang-Tian Li
A Gram-positive, aerobic, non-motile, rod-shapeds, cata-lase-positive, and oxidase-negative strain, designated Y49(T), was isolated from sewage collected from Jilin Agricultural University, China. It grew at 20-40°C (optimum at 30°C), at pH 6.0-8.0 (optimum at 7.0) and at 0-1.0% sodium chloride (optimum at 0%). The major isoprenoid quinone was menaquinone-8 (MK-8) and the polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylmethylethanolamine, four unidentified lipids, and two unidentified aminolipids...
April 20, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28281200/zntr-positively-regulates-t6ss4-expression-in-yersinia-pseudotuberculosis
#5
Tietao Wang, Keqi Chen, Fen Gao, Yiwen Kang, Muhammad Tausif Chaudhry, Zhuo Wang, Yao Wang, Xihui Shen
The type VI secretion system (T6SS) is a widespread and versatile protein secretion system found in most Gramnegative bacteria. Studies of T6SS have mainly focused on its role in virulence toward host cells and inter-bacterial interactions, but studies have also shown that T6SS4 in Yersinia pseudotuberculosis participates in the acquisition of zinc ions to alleviate the accumulation of hydroxyl radicals induced by multiple stressors. Here, by comparing the gene expression patterns of wild-type and zntR mutant Y...
March 10, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28281199/unraveling-new-functions-of-superoxide-dismutase-using-yeast-model-system-beyond-its-conventional-role-in-superoxide-radical-scavenging
#6
REVIEW
Woo-Hyun Chung
To deal with chemically reactive oxygen molecules constantly threatening aerobic life, cells are readily equipped with elaborate biological antioxidant systems. Superoxide dismutase is a metalloenzyme catalytically eliminating superoxide radical as a first-line defense mechanism against oxidative stress. Multiple different SOD isoforms have been developed throughout evolution to play distinct roles in separate subcellular compartments. SOD is not essential for viability of most aerobic organisms and intriguingly found even in strictly anaerobic bacteria...
March 9, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28281198/crystal-structure-of-the-inactive-state-of-the-receiver-domain-of-spo0a-from-paenisporosarcina-sp-tg-14-a-psychrophilic-bacterium-isolated-from-an-antarctic-glacier
#7
Chang Woo Lee, Sun-Ha Park, Sung Gu Lee, Seung Chul Shin, Se Jong Han, Han-Woo Kim, Hyun Ho Park, Sunghwan Kim, Hak Jun Kim, Hyun Park, HaJeung Park, Jun Hyuck Lee
The two-component phosphorelay system is the most prevalent mechanism for sensing and transducing environmental signals in bacteria. Spore formation, which relies on the two-component phosphorelay system, enables the longterm survival of the glacial bacterium Paenisporosarcina sp. TG-14 in the extreme cold environment. Spo0A is a key response regulator of the phosphorelay system in the early stage of spore formation. The protein is composed of a regulatory N-terminal phospho-receiver domain and a DNAbinding C-terminal activator domain...
March 9, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28281197/wild-birds-and-urban-pigeons-as-reservoirs-for-diarrheagenic-escherichia-coli-with-zoonotic-potential
#8
Clarissa A Borges, Marita V Cardozo, Livia G Beraldo, Elisabete S Oliveira, Renato P Maluta, Kaline B Barboza, Karin Werther, Fernando A Ávila
In order to describe the role of wild birds and pigeons in the transmission of shiga toxigenic Escherichia coli (STEC) and enteropathogenic Escherichia coli (EPEC) to humans and other animals, samples were collected from cloacae and oropharynx of free-living wild birds and free-living pigeons. Two STEC (0.8%) and five EPEC strains (2.0%) were isolated from wild birds and four EPEC strains (2.0%) were recovered from pigeons. Serogroups, sequence types (STs) and virulence genes, such as saa, iha, lpfA O113, ehxA, espA, nleB and nleE, detected in this study had already been implicated in human and animal diseases...
March 9, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28251549/the-hyperthermophilic-%C3%AE-amylase-from-thermococcus-sp-hj21-does-not-require-exogenous-calcium-for-thermostability-because-of-high-binding-affinity-to-calcium
#9
Huaixu Cheng, Zhidan Luo, Mingsheng Lu, Song Gao, Shujun Wang
The hyperthermophilic α-amylase from Thermococcus sp. HJ21 does not require exogenous calcium ions for thermostability, and is a promising alternative to commercially available α-amylases to increase the efficiency of industrial processes like the liquefaction of starch. We analyzed the amino acid sequence of this α-amylase by sequence alignments and structural modeling, and found that this α-amylase closely resembles the α-amylase from Pyrococcus woesei. The gene of this α-amylase was cloned in Escherichia coli and the recombinant α-amylase was overexpressed and purified with a combined renaturation-purification procedure...
March 1, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28251548/jindonia-aestuariivivens-gen-nov-sp-nov-isolated-from-a-tidal-flat-on-the-south-western-sea-in-republic-of-korea
#10
Sooyeon Park, Sun Young Yoon, Min-Ji Ha, Jung-Hoon Yoon
A Gram-stain-negative, aerobic, non-flagellated, and coccoid, ovoid or rod-shaped bacterium, designated JDTF-65(T), was isolated from a tidal flat on the south-western sea in Republic of Korea. Strain JDTF-65(T) grew optimally at 25°C, at pH 7.0-8.0 and in the presence of 2.0% (w/v) NaCl. Strain JDTF-65(T) exhibited 16S rRNA gene sequence similarities of 97.1-97.6% to the type strains of 'Aliisedimentitalea scapharcae', Phaeobacter gallaeciensis, Phaeobacter inhibens, Leisingera aquimarina, Tropicibacter litoreus, Sulfitobacter pseudonitzschiae, and Pseudoseohaeicola caenipelagi...
March 1, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28251545/impact-of-tillage-practices-on-soil-bacterial-diversity-and-composition-under-the-tobacco-rice-rotation-in-china
#11
Yanping Lei, Yongliang Xiao, Lifeng Li, Chaoqiang Jiang, Chaolong Zu, Tian Li, Hui Cao
Tobacco-rice rotation is a common farming system in south China, and many tillage practices such as straw mulching, dolomite dust, and quicklime application have been adopted to improve crop production. These agricultural management practices alter soil physical and chemical properties and affect microbial life environment and community composition. In this research, six tillage practices including no tobacco and rice straw mulching (CK), tobacco and rice straw mulching (TrSr), rice straw returning fire (TrSc), tobacco and rice straw mulching with dolomite dust (TSD), rice straw returning fire and quicklime (TSQ), and rice straw returning fire, quicklime and reduced fertilizer (TSQf) were conducted to detect changes in soil bacterial diversity and composition using Illumina sequencing...
March 1, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28124782/azohydromonas-riparia-sp-nov-and-azohydromonas-ureilytica-sp-nov-isolated-from-a-riverside-soil-in-south-korea
#12
Tuan Manh Nguyen, Jaisoo Kim
White and pale yellow coloured bacteria were isolated from the riverside soil, Daejeon, South Korea, and were designated UCM-11(T), UCM-F25, and UCM-80(T). We found that all strains were able to reduce nitrate, and the cells were aerobic and motile. The DNA G+C contents of UCM-11(T), UCM-F25, and UCM-80(T) were between 68.9 to 71.2 mol% and the main ubiquinone was observed as Q-8. Based on16S rRNA gene sequences, strains UCM-11(T) and UCM-F25 were found to closely match with Azohydromonas australica IAM 12664(T) (98...
January 26, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28124780/the-antibacterial-activity-of-e-coli-bacteriophage-lysin-lysep3-is-enhanced-by-fusing-the-bacillus-amyloliquefaciens-bacteriophage-endolysin-binding-domain-d8-to-the-c-terminal-region
#13
Shuang Wang, Jingmin Gu, Meng Lv, Zhimin Guo, Guangmou Yan, Ling Yu, Chongtao Du, Xin Feng, Wenyu Han, Changjiang Sun, Liancheng Lei
Bacteriophage endolysin is one of the most promising antibiotic substitutes, but in Gram-negative bacteria, the outer membrane prevents the lysin from hydrolyzing peptidoglycans and blocks the development of lysin applications. The prime strategy for new antibiotic substitutes is allowing lysin to access the peptidoglycan from outside of the bacteria by reformation of the lysin. In this study, the novel Escherichia coli (E. coli) phage lyase lysep3, which lacks outside-in catalytic ability, was fused with the N-terminal region of the Bacillus amyloliquefaciens lysin including its cell wall binding domain D8 through the best manner of protein fusion based on the predicted tertiary structure of lysep3-D8 to obtain an engineered lysin that can lyse bacteria from the outside...
January 26, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28124777/minimal-amino-acids-in-the-i-lweq-domain-required-for-anterior-posterior-localization-in-dictyostelium
#14
Hyeseon Kim, Dong-Yeop Shin, Taeck Joong Jeon
Establishment of cell polarity is mediated by a series of signaling molecules that are asymmetrically activated or localized in the cell upon extracellular stimulation. To understand the mechanism that mediates anterior/posterior asymmetric localization of RapGAP3 during migration, we determined the minimally required amino acids in the I/LWEQ domain that cause posterior localization and found that the minimal region of the F-actin binding domain for posterior localization could, with some additional deletion at the C-terminal, localize to the anterior...
January 26, 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28361343/erratum-to-a-computationally-simplistic-poly-phasic-approach-to-explore-microbial-communities-from-the-yucatan-aquifer-as-a-potential-sources-of-novel-natural-products
#15
Miguel David Marfil-Santana, Aileen O'Connor-Sánchez, Jorge Humberto Ramírez-Prado, Cesar De Los Santos-Briones, Lluvia Korynthia López-Aguiar, Rafael Rojas-Herrera, Asunción Lago-Lestón, Alejandra Prieto-Davó
No abstract text is available yet for this article.
April 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28361342/potential-use-of-lactic-acid-bacteria-leuconostoc-mesenteroides-as-a-probiotic-for-the-removal-of-pb-ii-toxicity
#16
Young-Joo Yi, Jeong-Muk Lim, Suna Gu, Wan-Kyu Lee, Eunyoung Oh, Sang-Myeong Lee, Byung-Taek Oh
It has been demonstrated that certain lactic acid bacteria (LAB) can sequester metal ions by binding them to their surfaces. In the present study, lead (Pb)-resistant LAB were isolated from kimchi, a Korean fermented food. A total of 96 different LAB strains were isolated, and 52 strains showed lead resistance. Among them, an LAB strain-96 (L-96) identified as Leuconostoc mesenteroides showed remarkable Pb resistance and removal capacity. The maximum adsorption capacity of this strain calculated using the Langmuir isotherm was 60...
April 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28361341/cot-kinase-plays-a-critical-role-in-helicobacter-pylori-induced-il-8-expression
#17
Sungil Jang, Jinmoon Kim, Jeong-Heon Cha
Helicobacter pylori is a major pathogen causing various gastric diseases including gastric cancer. Infection of H. pylori induces pro-inflammatory cytokine IL-8 expression in gastric epithelial cells in the initial inflammatory process. It has been known that H. pylori can modulate Ras-Raf-Mek-Erk signal pathway for IL-8 induction. Recently, it has been shown that another signal molecule, cancer Osaka thyroid oncogene/tumor progression locus 2 (Cot/Tpl2) kinase, activates Mek and Erk and plays a role in the Erk pathway, similar to MAP3K signal molecule Raf kinase...
April 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28251547/spirosoma-luteolum-sp-nov-isolated-from-water
#18
Jae-Jin Lee, Su-Jin Park, Yeon-Hee Lee, Seung-Yeol Lee, Sangkyu Park, Young-Je Cho, Myung Kyum Kim, Leonid N Ten, Hee-Young Jung
A novel Gram-negative and rod-shaped bacterial strain, designated as 16F6E(T), was isolated from a water sample. Cells were yellowish in color and catalase- and oxidase-positive. The strain grew at 10-37°C (optimum at 25°C) but not at 4 and 42°C, and pH 5-7 (optimum at pH 7). It showed moderate resistance to gamma-ray irradiation. Comparative phylogenetic analysis showed that strain 16F6E(T) belonged to the family Cytophagaceae of the class Cytophagia. Furthermore, this isolate showed relatively low 16S rRNA gene sequence similarities (90...
April 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28251546/plasmodium-falciparum-apicoplast-and-its-transcriptional-regulation-through-calcium-signaling
#19
REVIEW
Praveen Rai, Drista Sharma, Rani Soni, Nazia Khatoon, Bhaskar Sharma, Tarun Kumar Bhatt
Malaria has been present since ancient time and remains a major global health problem in developing countries. Plasmodium falciparum belongs to the phylum Apicomplexan, largely contain disease-causing parasites and characterized by the presence of apicoplast. It is a very essential organelle of P. falciparum responsible for the synthesis of key molecules required for the growth of the parasite. Indispensable nature of apicoplast makes it a potential drug target. Calcium signaling is important in the establishment of malaria parasite inside the host...
April 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28127719/fungal-diversity-in-soils-across-a-gradient-of-preserved-brazilian-cerrado
#20
Ademir Sergio Ferreira de Araujo, Walderly Melgaço Bezerra, Vilma Maria Dos Santos, Luis Alfredo Pinheiro Leal Nunes, Maria do Carmo Catanho Pereira de Lyra, Marcia do Vale Barreto Figueiredo, Vania Maria Maciel Melo
The preserved Cerrado from Northeastern Brazil presents different physicochemical properties and plant diversity, which can influence the fungal communities. Therefore, we evaluated the fungal diversity in preserved sites, at Sete Cidades National Park, across a gradient of vegetation that included Campo graminoide, Cerrado stricto sensu, Cerradao, and Floresta decidual. Of all of the operational taxonomic units (OTUs) obtained, the Floresta decidual presented the highest richness. Ascomycota were the most abundant phylum (45%), followed by Basidiomycota (32%)...
April 2017: Journal of Microbiology / the Microbiological Society of Korea
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