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Journal of Microbiology / the Microbiological Society of Korea

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https://www.readbyqxmd.com/read/29392563/lysobacter-spongiae-sp-nov-isolated-from-spongin
#1
Heejae Choi, Wan-Taek Im, Jin-Sook Park
A Gram-negative, motile, aerobic and rod-shaped bacterial strain designated 119BY6-57T was isolated from spongin. The taxonomic position of the novel isolate was confirmed using the polyphasic approach. Strain 119BY6-57T grew well at 25-30°C on marine agar. On the basis of 16S rRNA gene sequence similarity, strain 119BY6-57T belongs to the family Xanthomonadaceae and is related to Lysobacter aestuarii S2-CT (99.8% sequence similarity), L. maris KMU-14T (97.5%), and L. daejeonensis GH1-9T (97.3%). Lower sequence similarities (97...
February 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29392562/effects-of-heat-killed-lactobacillus-plantarum-against-influenza-viruses-in-mice
#2
Sehee Park, Jin Il Kim, Joon-Yong Bae, Kirim Yoo, Hyunung Kim, In-Ho Kim, Man-Seong Park, Ilseob Lee
The potential use of dietary measures to treat influenza can be an important alternative for those who lack access to influenza vaccines or antiviral drugs. Lactobacillus plantarum (Lp) is one of many lactic acid bacteria that grow in 'kimchi', an essential part of Korean meal, and several strains of Lp reportedly show protective effects against influenza. Using heat-killed Lp (nF1) isolated from kimchi, which is known for its immunomodulatory effects, we investigated whether regular oral intake of nF1 could influence the outcome of influenza virus infection in a mouse model...
February 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29392561/functional-expression-and-enzymatic-characterization-of-lactobacillus-plantarum-cyclomaltodextrinase-catalyzing-novel-acarbose-hydrolysis
#3
Myoung-Uoon Jang, Hye-Jeong Kang, Chang-Ku Jeong, Yewon Kang, Ji-Eun Park, Tae-Jip Kim
Cyclomaltodextrinases (CDases) belong to Glycoside Hydrolases (GH) family 13, which show versatile hydrolyzing and/or transglycosylation activity against cyclodextrin (CD), starch, and pullulan. Especially, some CDases have been reported to hydrolyze acarbose, a potent α-glucosidase inhibitor, and transfer the resulting acarviosine-glucose to various acceptors. In this study, a novel CDase (LPCD) gene was cloned from Lactobacillus plantarum WCFS1, which encodes 574 amino acids (64.6 kDa) and shares less than 44% of identities with the known CDase-family enzymes...
February 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29392560/a-common-evolutionary-pathway-for-maintaining-quorum-sensing-in-pseudomonas-aeruginosa
#4
Bai-Min Lai, Hui-Cong Yan, Mei-Zhen Wang, Na Li, Dong-Sheng Shen
In the bacterium Pseudomonas aeruginosa, the synthesis and secretion of extracellular protease is a typical cooperative behavior regulated by quorum sensing. However, this type of cooperative behavior is easily exploited by other individuals who do not synthesize public goods, which is known as the "tragedy of the commons". Here P. aeruginosa was inoculated into casein media with different nitrogen salts added. In casein broth, protease (a type of public good) is necessary for bacterial growth. After 30 days of sequential transfer, some groups propagated stably and avoided "tragedy of the commons"...
February 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29392559/probiotic-potential-of-novel-lactobacillus-strains-isolated-from-salted-fermented-shrimp-as-antagonists-for-vibrio-parahaemolyticus
#5
Bao Le, Seung Hwan Yang
Lactobacillus strains have been considered good candidates as biological control agents for prevention or treatment of plant and animal infections. One L. plantarum strain FB003 and three strains (FB011, FB081, and FB110) which closed to L. sakei were isolated from fermented and salted shrimp and their abilities in inhibiting growth of Vibrio parahaemolyticus were characterized. These strains were selected as potential probiotics based on their oro-gastro-intestinal resistance, gut colonization, adhesion to Caco-2 cells, antimicrobial activities, antibiotic resistance, and safety aspects...
February 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29392558/spirosoma-pomorum-sp-nov-isolated-from-apple-orchard-soil
#6
Weilan Li, Seung-Yeol Lee, In-Kyu Kang, Leonid N Ten, Hee-Young Jung
A Gram-negative, motile, rod-shaped, aerobic bacterial strain, designated S7-2-11T, was isolated from apple orchard soil from Gyeongsangnam-do Province, Republic of Korea, and was characterized taxonomically using a polyphasic approach. 16S rRNA gene sequence analysis indicated that strain S7-2-11T belongs to the family Cytophagaceae in phylum Bacteroidetes, and is closely related to Spirosoma luteolum 16F6ET (94.2% identity), Spirosoma knui 15J8-12T (92.7%), and Spirosoma linguale DSM 74T (91.0%). The G + C content of the genomic DNA of strain S7-2-11T was 49...
February 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29392557/the-antimicrobial-potential-of-a-new-derivative-of-cathelicidin-from-bungarus-fasciatus-against-methicillin-resistant-staphylococcus-aureus
#7
Mercedeh Tajbakhsh, Abdollah Karimi, Abolghasem Tohidpour, Naser Abbasi, Fatemeh Fallah, Maziar Mohammad Akhavan
Cathelicidins are a family of antimicrobial peptides which exhibit broad antimicrobial activities against antibiotic-resistant bacteria. Considering the progressive antibiotic resistance, cathelicidin is a candidate for use as an alternative approach to treat and overcome the challenge of antimicrobial resistance. Cathelicidin-BF (Cath-BF) is a short antimicrobial peptide, which was originally extracted from the venom of Bungarus fasciatus. Recent studies have reported that Cath-BF and some related derivatives exert strong antimicrobial and weak hemolytic properties...
February 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29392556/contrasting-patterns-of-the-bacterial-and-archaeal-communities-in-a-high-elevation-river-in-northwestern-china
#8
Yang Hu, Jian Cai, Chengrong Bai, Keqiang Shao, Xiangming Tang, Guang Gao
The patterns of macrobiota in lotic ecosystems have been extensively explored, however, the dynamics of microbiota remain poorly investigated, especially in the high-elevation region. To address this deficit, we collected eight samples to unveil the bacterial and archaeal community in the Kaidu river, located at the arid region of northwestern China (an average of 2,500 m a.s.l.). For the bacterial community, phylogenetically Betaproteobacteria prevailed, followed by Alphaproteobacteria and Actinobacteria; at the finer genus level, Limnohabitans and Variovorax were prominent...
February 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29392555/isolation-and-characterization-of-aspergillus-flavus-strains-in-china
#9
Firew Tafesse Mamo, Bo Shang, Jonathan Nimal Selvaraj, Yan Wang, Yang Liu
Important staple foods (peanuts, maize and rice) are susceptible to contamination by aflatoxin (AF)-producing fungi such as Aspergillus flavus. The objective of this study was to explore non-aflatoxin-producing (atoxigenic) A. flavus strains as biocontrol agents for the control of AFs. In the current study, a total of 724 A. flavus strains were isolated from different regions of China. Polyphasic approaches were utilized for species identification. Non-aflatoxin and non-cyclopiazonic acid (CPA)-producing strains were further screened for aflatoxin B1 (AFB1) biosynthesis pathway gene clusters using a PCR assay...
February 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29299848/kurthia-ruminicola-sp-nov-isolated-from-the-rumen-contents-of-a-holstein-cow
#10
Myung Kyum Kim, Eun Tae Kim, Sang Bum Kim, Ha Yeon Jeong, Beom Young Park, Sathiyaraj Srinivasan
Gram-staining-positive, motile, rod-shaped bacteria, designated as H31022T and H31024 was isolated from rumen contents of a Holstein cow. Optimum growth occurred at 25°C and pH 7.0 on R2A agar medium. Oxidase and catalase activities are positive. The 16S rRNA gene sequence (1,452 bp) of the new isolates revealed they belong to the genus Kurthia of the phylum Firmicutes. Highest gene sequence similarities were assessed to be with Kurthia massiliensis JC30T (98.4%), Kurthia senegalensis JC8ET (97.5%), and Kurthia populi 10y-14T (97...
January 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29299847/baekduia-soli-gen-nov-sp-nov-a-novel-bacterium-isolated-from-the-soil-of-baekdu-mountain-and-proposal-of-a-novel-family-name-baekduiaceae-fam-nov
#11
Dong-Shan An, Muhammad Zubair Siddiqi, Kyoung-Ho Kim, Hong-Shan Yu, Wan-Taek Im
A taxonomic study was conducted on BR7-21T, a bacterial strain isolated from the soil of a ginseng field in Baekdu Mountain. Comparative studies of the 16S rRNA gene sequence showed that the isolate was most closely related to Conexibacter woesei DSM 14684T, Solirubrobacter pauli ATCC BAA-492T, Patulibacter minatonensis JCM 12834T, with 93.8%, 92.4%, and 91.5% sequence similarity, respectively; each genus represented a family in the order Solirubrobacterales. Strain BR7-21T was Gram-reaction positive, non-spore forming, aerobic, non-motile, and short rod-shaped...
January 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29299846/larkinella-roseus-sp-nov-a-species-of-the-family-cytophagaceae-isolated-from-beach-soil
#12
Jae-Bong Lee, Sumin Hong, Seung-Yeol Lee, Su-Jin Park, Kyeung Il Park, Seok-Gwan Choi, Myung Kyum Kim, Leonid N Ten, Hee-Young Jung
The taxonomic position of bacterial strain, designated 15J16-1T3AT, recovered from a soil sample was established using a polyphasic approach. Phylogenic analysis based on the 16S rRNA gene sequence showed that strain 15J16-1T3AT belonged to the family Cytophagaceae, phylum Bacteroidetes, and was most closely related to 'Larkinella harenae' 15J9-9 (95.9% similarity), Larkinella ripae 15J11-11T (95.6%), Larkinella bovis M2TB15T (94.7%), Larkinella arboricola Z0532T (93.9%), and Larkinella insperata LMG 22510T (93...
January 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29299845/host-specificity-of-symbiotic-mycorrhizal-fungi-for-enhancing-seed-germination-protocorm-formation-and-seedling-development-of-over-collected-medicinal-orchid-dendrobium-devonianum
#13
Hui Huang, Xiao-Meng Zi, Hua Lin, Jiang-Yun Gao
All orchids maintain an obligate relationship with mycorrhizal symbionts during seed germination. In most cases, germination-enhancing fungi have been isolated from roots of mature plants for conservation and cultivation purposes. To understand the germination biology of Dendrobium devonianum, an over-collected medicinal orchid, the seeds of D. devonianum were inoculated with a fungal strain (FDd1) isolated from naturally occurring protocorms of D. devonianum and two other germination-enhancing fungal strains (FDaI7 and FCb4) from D...
January 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29299844/vacuolar-zinc-transporter-zrc1-is-required-for-detoxification-of-excess-intracellular-zinc-in-the-human-fungal-pathogen-cryptococcus-neoformans
#14
Minsu Cho, Guanggan Hu, Mélissa Caza, Linda C Horianopoulos, James W Kronstad, Won Hee Jung
Zinc is an important transition metal in all living organisms and is required for numerous biological processes. However, excess zinc can also be toxic to cells and cause cellular stress. In the model fungus Saccharomyces cerevisiae, a vacuolar zinc transporter, Zrc1, plays important roles in the storage and detoxification of excess intracellular zinc to protect the cell. In this study, we identified an ortholog of the S. cerevisiae ZRC1 gene in the human fungal pathogen Cryptococcus neoformans. Zrc1 was localized in the vacuolar membrane in C...
January 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29299843/diversity-of-fungi-associated-with-roots-of-calanthe-orchid-species-in-korea
#15
Myung Soo Park, John A Eimes, Sang Hoon Oh, Hwa Jung Suh, Seung-Yoon Oh, Seobihn Lee, Ki Hyeong Park, Hyuk Joon Kwon, Soo-Young Kim, Young Woon Lim
While symbiotic fungi play a key role in the growth of endangered Calanthe orchid species, the relationship between fungal diversity and Calanthe species remains unclear. Here, we surveyed root associated fungal diversity of six Calanthe orchid species by sequencing the internal transcribed spacer (ITS) region using 454 pyrosequencing. Our results revealed that Paraboeremia and Coprinopsis are dominant fungal genera among Calanthe species. In terms of overall relative abundance, Paraboeremia was the most common fungal genus associated with Calanthe roots, followed by Coprinopsis...
January 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29299842/structural-analysis-of-n-o-glycans-assembled-on-proteins-in-yeasts
#16
Eun Jung Thak, Jungho Kim, Dong-Jik Lee, Jeong Yoon Kim, Hyun Ah Kang
Protein glycosylation, the most universal and diverse post-translational modification, can affect protein secretion, stability, and immunogenicity. The structures of glycans attached to proteins are quite diverse among different organisms and even within yeast species. In yeast, protein glycosylation plays key roles in the quality control of secretory proteins, and particularly in maintaining cell wall integrity. Moreover, in pathogenic yeasts, glycans assembled on cell-surface glycoproteins can mediate their interactions with host cells...
January 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29299841/application-of-high-salinity-stress-for-enhancing-the-lipid-productivity-of-chlorella-sorokiniana-hs1-in-a-two-phase-process
#17
Ramesh Kakarla, Jung-Woon Choi, Jin-Ho Yun, Byung-Hyuk Kim, Jina Heo, Sujin Lee, Dae-Hyun Cho, Rishiram Ramanan, Hee-Sik Kim
Increased lipid accumulation of algal cells as a response to environmental stress factors attracted much attention of researchers to incorporate this stress response into industrial algal cultivation process with the aim of enhancing algal lipid productivity. This study applies high-salinity stress condition to a two-phase process in which microalgal cells are initially grown in freshwater medium until late exponential phase and subsequently subjected to high-salinity condition that induces excessive lipid accumulation...
January 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29299840/functional-analysis-of-mpk1-mediated-cell-wall-integrity-signaling-pathway-in-the-thermotolerant-methylotrophic-yeast-hansenula-polymorpha
#18
Hyunah Kim, Eun Jung Thak, Ji Yoon Yeon, Min Jeong Sohn, Jin Ho Choo, Jeong-Yoon Kim, Hyun Ah Kang
Understanding the characteristics and regulation mechanisms of cell wall integrity (CWI) in yeast is important not only for basic research but also in biotechnological applications. We found significantly different CWIs in two representative strains of the thermotolerant methylotrophic yeast Hansenula polymorpha. Compared to the A16 strain (classified as Ogataea polymorpha), the DL1-L strain (classified as Ogataea parapolymorpha) has a thinner cell wall that was found to be more fragile following long-term cultivation and more sensitive to zymolyase...
January 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29299839/taxonomic-hierarchy-of-the-phylum-firmicutes-and-novel-firmicutes-species-originated-from-various-environments-in-korea
#19
REVIEW
Chi Nam Seong, Joo Won Kang, Ji Hee Lee, So Yeon Seo, Jung Jae Woo, Chul Park, Kyung Sook Bae, Mi Sun Kim
This study assessed the taxonomic hierarchy of the phylum Firmicutes as well as elucidated the isolation and classification states of novel Firmicutes species isolated from Korean territory. The hierarchical classification system of the phylum Firmicutes has been developed since 1872 when the genus Bacillus was first reported and has been generally adopted since 2001. However, this taxonomic hierarchy is still being modified. Until Feb. 2017, the phylum Firmicutes consisted of seven classes (Bacilli, Clostridia, Erysipelotrichia, Limnochordia, Negativicutes, Thermolithobacteria, and Tissierellia), 13 orders, 45 families, and 421 genera...
January 2018: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29214496/erratum-to-application-of-high-resolution-melting-analysis-for-differentiation-of-spoilage-yeasts
#20
Mine Erdem, Zülal Kesmen, Esra Özbekar, Bülent Çetin, Hasan Yetim
In the article by Erdem et al. published in Journal of Microbiology 2016; 54, 618-625, the figure 1 should be corrected as below.
December 2017: Journal of Microbiology / the Microbiological Society of Korea
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