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Journal of Microbiology / the Microbiological Society of Korea

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https://www.readbyqxmd.com/read/30392155/community-structures-and-genomic-features-of-undesirable-white-colony-forming-yeasts-on-fermented-vegetables
#1
Joon Yong Kim, Juseok Kim, In-Tae Cha, Min Young Jung, Hye Seon Song, Yeon Bee Kim, Changsu Lee, Seung-Yeon Kang, Jin-Woo Bae, Yoon-E Choi, Tae-Woon Kim, Seong Woon Roh
White colony-forming yeasts (WCFYs) often appear in fermented foods, depending on the storage method. Despite the ongoing research on fermented foods, the community and genome features of WCFYs have not been well studied. In this study, the community structures of WCFYs on fermented vegetables (kimchi) prepared with various raw materials were investigated using deep sequencing. Only eight operational taxonomic units (OTUs) were detected, indicating that the community structure of WCFYs on kimchi is very simple...
October 25, 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30377993/modulation-of-gut-microbiome-in-nonalcoholic-fatty-liver-disease-pro-pre-syn-and-antibiotics
#2
REVIEW
Min Seok Cho, Sang Yeol Kim, Ki Tae Suk, Byung-Yong Kim
Nonalcoholic fatty liver disease (NAFLD) is one of the most common types of liver diseases worldwide and its incidence continues to increase. NAFLD occurs when the body can no longer effectively store excess energy in the adipose tissue. Despite the increasing prevalence of NAFLD, making lifestyle changes, including increased exercise, is often an elusive goal for patients with NAFLD. The liver directly connects to the gut-gastrointestinal milieu via the portal vein, which are all part of the gut-liver axis...
October 25, 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30361979/salicibibacter-kimchii-gen-nov-sp-nov-a-moderately-halophilic-and-alkalitolerant-bacterium-in-the-family-bacillaceae-isolated-from-kimchi
#3
Ja-Young Jang, Young Joon Oh, Seul Ki Lim, Hyo Kyeong Park, Changsu Lee, Joon Yong Kim, Mi-Ai Lee, Hak-Jong Choi
A moderately halophilic and alkalitolerant bacterial strain NKC1-1T was isolated from commercial kimchi in Korea. Strain NKC1-1T was Gram-stain-positive, aerobic, rod-shaped, non-motile, and contained diaminopimelic acid-type murein. Cell growth was observed in a medium containing 0-25% (w/v) NaCl (optimal at 10% [w/v]), at 20-40°C (optimal at 37°C) and pH 6.5-10.0 (optimal at pH 9.0). The major isoprenoid quinone of the isolate was menaquinone-7, and the major polar lipids were phosphatidylglycerol and unidentified phospholipids...
October 25, 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30361978/antibiofilm-effect-of-biofilm-dispersing-agents-on-clinical-isolates-of-pseudomonas-aeruginosa-with-various-biofilm-structures
#4
Soo-Kyoung Kim, Xi-Hui Li, Hyeon-Ji Hwang, Joon-Hee Lee
Pseudomonas aeruginosa, an opportunistic human pathogen, causes many biofilm-mediated chronic infections. In this study, biofilm structures of various clinical strains of P. aeruginosa isolated from hospitalized patients were examined and their influence on the biofilm-dispersing effects of chemicals was investigated. The clinical isolates formed structurally distinct biofilms that could be classified into three different groups: 1) mushroom-like, 2) thin flat, and 3) thick flat structures. A dispersion of these differently structured biofilms was induced using two biofilm-dispersing agents, anthranilate and sodium nitroprusside (SNP)...
October 25, 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30361977/zunongwangia-flava-sp-nov-belonging-to-the-family-flavobacteriaceae-isolated-from-salicornia-europaea
#5
Eui-Sang Cho, In-Tae Cha, Hak-Jong Choi, Seong Woon Roh, Young-Do Nam, Sung Man Seo, Myung-Ji Seo
A yellow pigmented bacterium designated strain MBLN094T within the family Flavobacteriaceae was isolated from a halophyte Salicornia europaea on the coast of the Yellow Sea. This strain was a Gram-stain negative, aerobic, non-spore forming, rod-shaped bacterium. Phylogenetic analysis of the 16S rRNA gene sequence of strain MBLN094T was found to be related to the genus Zunongwangia, exhibiting 16S rRNA gene sequence similarity values of 97.0, 96.8, 96.4, and 96.3% to Zunongwangia mangrovi P2E16T , Z. profunda SM-A87T , Z...
October 25, 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30361976/characterization-of-the-velvet-regulators-in-aspergillus-flavus
#6
Tae-Jin Eom, Heungyun Moon, Jae-Hyuk Yu, Hee-Soo Park
Fungal development and secondary metabolism are closely associated via the activities of the fungal NK-kB-type velvet regulators that are highly conserved in filamentous fungi. Here, we investigated the roles of the velvet genes in the aflatoxigenic fungus Aspergillus flavus. Distinct from other Aspergillus species, the A. flavus genome contains five velvet genes, veA, velB, velC, velD, and vosA. The deletion of velD blocks the production of aflatoxin B1, but does not affect the formation of sclerotia. Expression analyses revealed that vosA and velB mRNAs accumulated at high levels during the late phase of asexual development and in conidia...
October 25, 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30361975/paenibacillus-seodonensis-sp-nov-isolated-from-a-plant-of-the-genus-campanula
#7
Myung-Suk Kang, Ki-Eun Lee, Eun-Young Lee, Soo-Je Park
Strain DCT-19T , representing a Gram-stain-positive, rodshaped, aerobic bacterium, was isolated from a native plant belonging to the genus Campanula on Dokdo, the Republic of Korea. Comparative analysis of the 16S rRNA gene sequence showed that this strain was closely related to Paenibacillus amylolyticus NRRL NRS-290T (98.6%, 16S rRNA gene sequence similarity), Paenibacillus tundrae A10bT (98.1%), and Paenibacillus xylanexedens NRRL B-51090T (97.6%). DNADNA hybridization indicated that this strain had relatively low levels of DNA-DNA relatedness with P...
October 25, 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30361974/characterization-of-a-salmonella-enteritidis-bacteriophage-showing-broad-lytic-activity-against-gram-negative-enteric-bacteria
#8
Shukho Kim, Sung-Hun Kim, Marzia Rahman, Jungmin Kim
In this study, we sought to isolate Salmonella Enteritidis-specific lytic bacteriophages (phages), and we found a lytic phage that could lyse not only S. Enteritidis but also other Gramnegative foodborne pathogens. This lytic phage, SS3e, could lyse almost all tested Salmonella enterica serovars as well as other enteric pathogenic bacteria including Escherichia coli, Shigella sonnei, Enterobacter cloacae, and Serratia marcescens. This SS3e phage has an icosahedral head and a long tail, indicating belong to the Siphoviridae...
October 25, 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30353471/diagnosis-and-molecular-characteristics-of-human-infections-caused-by-anaplasma-phagocytophilum-in-south-korea
#9
Seung Hun Lee, Sungdo Park, Yeong Seon Lee, Hae Kyung Lee, Seon Do Hwang
Human granulocytic anaplasmosis (HGA) is a tick borne infection caused by Anaplasma phagocytophilum. HGA cases in South Korea have been identified since the first report in 2014. In this study, we investigated the serological response in 594 clinical samples of patients with acute febrile illness and molecular characteristics of A. phagocytophilum clinical isolates obtained from HGA patients. In serological test for A. phagocytophilum, 7.91% (47/594 cases) were positive for IgG and Ig M and 13 of 47 cases showed seroconversion...
November 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30353470/astragaloside-iv-reversed-the-autophagy-and-oxidative-stress-induced-by-the-intestinal-microbiota-of-ais-in-mice
#10
Nan Xu, Pengcheng Kan, Xiuhua Yao, Ping Yang, Jiwei Wang, Lei Xiang, Yu Zhu
Acute ischaemic stroke (AIS) seriously affects patient quality of life. We explored the role of the intestinal microbiota on oxidative stress and autophagy in stroke, and Astragaloside IV (AS-IV) reversed the changes induced by intestinal microbiota. We determined the characteristics of the intestinal microbiota of AIS and transient ischaemic attack (TIA) patients by 16S sequencing and found that the structure and diversity of the intestinal microbiota in patients with AIS and TIA were significantly different from those in healthy subjects...
November 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30353469/photodynamic-antimicrobial-activity-of-new-porphyrin-derivatives-against-methicillin-resistant-staphylococcus-aureus
#11
Hüseyin Taslı, Ayse Akbıyık, Nermin Topaloğlu, Vildan Alptüzün, Sülünay Parlar
Methicillin resistant Staphylococcus aureus (MRSA) with multiple drug resistance patterns is frequently isolated from skin and soft tissue infections that are involved in chronic wounds. Today, difficulties in the treatment of MRSA associated infections have led to the development of alternative approaches such as antimicrobial photodynamic therapy. This study aimed to investigate photoinactivation with cationic porphyrin derivative compounds against MRSA in in-vitro conditions. In the study, MRSA clinical isolates with different antibiotic resistance profiles were used...
November 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30353468/spectral-and-structural-analysis-of-large-stokes-shift-fluorescent-protein-dkeima570
#12
Yongbin Xu, Kwang Yeon Hwang, Ki Hyun Nam
The Keima family comprises large Stokes shifts fluorescent proteins, which are useful for dual-color fluorescence crosscorrelation spectroscopy and multicolor imaging. dKeima570 belongs to the Keima family. It has a unique chromophore sequence composed of CYG with an emission peak at 570 nm, but its molecular properties are unclear. We report the spectral analysis of dKeima570 and its crystal structure at 2.0 Å resolution. The dKeima570 chromophore is mainly in the protonation state in the entire pH range...
November 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30353467/genetic-variation-of-colletotrichum-magnum-isolated-from-carica-papaya-as-revealed-by-dna-fingerprinting
#13
Daisy Pérez-Brito, Alberto Cortes-Velázquez, Teresita Valencia-Yah, Anuar Magaña-Álvarez, Cuauhtémoc Navarro, Blanca Moreno, Steven Quiroga, Raúl Tapia-Tussell
Mexico is one of the five largest producers of papaya worldwide, but losses caused by pathogens, mainly fungus, at the pre- and post-harvest stages are often more than 50% of the crop. Papaya anthracnose, caused by three different species of the Colletotrichum genus in Mexico, occupies a preponderant place in this problem. Although two of these species, C. gloeosporiodes and C. truncatum, have been characterized morphologically and genotypically, this has not occurred with C. magnum, the third species involved, about which there is very little information...
November 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30353466/identification-and-heterologous-reconstitution-of-a-5-alk-en-ylresorcinol-synthase-from-endophytic-fungus-shiraia-sp-slf14
#14
Huiwen Yan, Lei Sun, Jinge Huang, Yixing Qiu, Fuchao Xu, Riming Yan, Du Zhu, Wei Wang, Jixun Zhan
A new type III polyketide synthase gene (Ssars) was discovered from the genome of Shiraia sp. Slf14, an endophytic fungal strain from Huperzia serrata. The intron-free gene was cloned from the cDNA and ligated to two expression vectors pET28a and YEpADH2p-URA3 for expression in Escherichia coli BL21(DE3) and Saccharomyces cerevisiae BJ5464, respectively. SsARS was efficiently expressed in E. coli BL21(DE3), leading to the synthesis of a series of polyketide products. Six major products were isolated from the engineered E...
November 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30353465/comparative-genomic-analysis-of-pyrene-degrading-mycobacterium-species-genomic-islands-and-ring-hydroxylating-dioxygenases-involved-in-pyrene-degradation
#15
Dae-Wi Kim, Kihyun Lee, Do-Hoon Lee, Chang-Jun Cha
The genome sequences of two pyrene-degrading bacterial strains of Mycobacterium spp. PYR10 and PYR15, isolated from the estuarine wetland of the Han river, South Korea, were determined using the PacBio RS II sequencing platform. The complete genome of strain PYR15 was 6,037,017 bp in length with a GC content of 66.5%, and contained 5,933 protein-coding genes. The genome of strain PYR10 was 5,999,427 bp in length with a GC content of 67.7%, and contained 5,767 protein-coding genes. Based on the average nucleotide identity values, these strains were designated as M...
November 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30353464/circular-pellicles-formed-by-pseudomonas-alkylphenolica-kl28-are-a-sophisticated-architecture-principally-designed-by-matrix-substance
#16
Myeong Mi Song, Yaligara Veeranagouda, Munkhtsatsral Ganzorig, Kyoung Lee
The colonization of liquid surfaces as floating biofilms or pellicles is a bacterial adaptation to optimally occupy the airliquid (A-L) niche. In aerobic heterotrophs, pellicle formation is beneficial for the utilization of O2 and nonpolar organic compounds. Pseudomonas alkylphenolica KL28, an alkylphenol degrader, forms flat circular pellicles that are 0.3-0.5 mm in diameter. In this study, we first monitored the pellicle developmental patterns of multicellular organization from the initial settlement stage...
November 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30353463/roseovarius-tibetensis-sp-nov-a-halophilic-bacterium-isolated-from-lake-longmuco-on-tibetan-plateau
#17
Hui-Bin Lu, Xiao-Feng Xue, Dorji Phurbu, Peng Xing, Qing-Long Wu
Two Gram-stain negative halophilic strains, designated as LM2T and LM4, were isolated from Lake LongmuCo on Tibetan Plateau. These two strains were aerobic, catalaseand oxidase-positive, nonmotile and rod-shaped organisms. Phylogenetic analysis based on 16S rRNA gene sequences indicated that LM2T and LM4 belong to the genus Roseovarius, with Roseovarius tolerans EL-172T (97.3% and 97.4% 16S rRNA gene sequence similarity, respectively) and Roseovarius azorensis SSW084T (95.5% and 95.6% 16S rRNA gene sequence similarity, respectively) as their closest neighbors...
November 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30353462/probiotics-in-human-health-and-disease-from-nutribiotics-to-pharmabiotics
#18
REVIEW
Eun-Sook Lee, Eun-Ji Song, Young-Do Nam, So-Young Lee
Probiotics are the most useful tools for balancing the gut microbiota and thereby influencing human health and disease. Probiotics have a range of effects, from those on nutritional status to medical conditions throughout the body from the gut to non-intestinal body sites such as the brain and skin. Research interest in probiotics with nutritive claims (categorized as nutribiotics) has evolved into interest in therapeutic and pharmacological probiotics with health claims (pharmabiotics). The concept of pharmabiotics emerged only two decades ago, and the new categorization of probiotics to nutribiotics and pharmabiotics was recently suggested, which are under the different regulation depending on that they are food or drug...
November 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30267318/streptomyces-sp-strain-sk68-isolated-from-peanut-rhizosphere-promotes-growth-and-alleviates-salt-stress-in-tomato-solanum-lycopersicum-cv-micro-tom
#19
Karthiyaini Damodharan, Sasikumar Arunachalam Palaniyandi, Bao Le, Joo-Won Suh, Seung Hwan Yang
A novel actinobacterium, strain SK68, was isolated from the rhizosphere of peanut plant and its salinity stress alleviation ability was studied using tomato (Solanum lycopersicum cv. Micro-Tom) plants. Based on 16S rDNA based phylogenetic analysis, strain SK68 has been identified as a Streptomyces sp. Strain SK68 had branched substrate mycelium bearing smooth surfaced spores and the spore colour is brownish grey on ISP4 medium. It exhibited enzyme activities such as xylanase, cellulase, amylase, and pectinase and degraded hypoxanthine, casein, and L-tyrosine...
October 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/30267317/lysobacter-panacihumi-sp-nov-isolated-from-ginseng-cultivated-soil
#20
Yue Huo, Jong-Pyo Kang, Joon Hurh, Yaxi Han, Jong-Chan Ahn, Ramya Mathiyalagan, Chunhong Piao, Deok-Chun Yang
A Gram-negative, non-motile, aerobic, catalase-, and oxidasepositive bacterial strain, designated DCY117T , was isolated from ginseng cultivated soil in Gochang-gun, Republic of Korea, and was characterized taxonomically using a multifaceted approach. 16S rRNA gene sequence analysis revealed that strain DCY117T showed highest similarity to Lysobacter ruishenii CTN-1T (95.3%). Phylogenetic analysis revealed that closely related relatives of strain DCY117T were L. aestuarii S2-CT (95.1%), L. daejeonensis GH1-9T (95...
October 2018: Journal of Microbiology / the Microbiological Society of Korea
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