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Journals Journal of Microbiology / the ...

Journal of Microbiology / the Microbiological Society of Korea

https://read.qxmd.com/read/38062325/transcriptomic-insights-into-archaeal-nitrification-in-the-amundsen-sea-polynya-antarctica
#21
JOURNAL ARTICLE
Joo-Han Gwak, Samuel Imisi Awala, So-Jeong Kim, Sang-Hoon Lee, Eun-Jin Yang, Jisoo Park, Jinyoung Jung, Sung-Keun Rhee
Antarctic polynyas have the highest Southern Ocean summer primary productivity, and due to anthropogenic climate change, these areas have formed faster recently. Ammonia-oxidizing archaea (AOA) are among the most ubiquitous and abundant microorganisms in the ocean and play a primary role in the global nitrogen cycle. We utilized metagenomics and metatranscriptomics to gain insights into the physiology and metabolism of AOA in polar oceans, which are associated with ecosystem functioning. A polar-specific ecotype of AOA, from the "Candidatus Nitrosomarinus"-like group, was observed to be dominant in the Amundsen Sea Polynya (ASP), West Antarctica, during a succession of summer phytoplankton blooms...
December 7, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/38055144/functional-characterization-of-dna-n-glycosylase-ogg1-and-ntg1-in-dna-damage-stress-of-cryptococcus-neoformans
#22
JOURNAL ARTICLE
Kwang-Woo Jung, Sunhak Kwon, Jong-Hyun Jung, Sangyong Lim, Yong-Sun Bahn
Reactive oxygen species induce DNA strand breaks and DNA oxidation. DNA oxidation leads to DNA mismatches, resulting in mutations in the genome if not properly repaired. Homologous recombination (HR) and non-homologous end-joining (NHEJ) are required for DNA strand breaks, whereas the base excision repair system mainly repairs oxidized DNAs, such as 8-oxoguanine and thymine glycol, by cleaving the glycosidic bond, inserting correct nucleotides, and sealing the gap. Our previous studies revealed that the Rad53-Bdr1 pathway mainly controls DNA strand breaks through the regulation of HR- and NHEJ-related genes...
December 6, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/38048022/antimicrobial-efficacy-of-allium-cepa-and-zingiber-officinale-against-the-milk-borne-pathogen-listeria-monocytogenes
#23
JOURNAL ARTICLE
Abirami Arasu, Nagaram Prabha, Durga Devi, Praveen Kumar Issac, Khaloud Mohammed Alarjani, Dunia A Al Farraj, Reem A Aljeidi, Dina S Hussein, Magesh Mohan, Jehad Zuhair Tayyeb, Ajay Guru, Jesu Arockiaraj
Listeria monocytogenes is an important food-borne pathogen that causes listeriosis and has a high case fatality rate despite its low incidence. Medicinal plants and their secondary metabolites have been identified as potential antibacterial substances, serving as replacements for synthetic chemical compounds. The present studies emphasize two significant medicinal plants, Allium cepa and Zingiber officinale, and their efficacy against L. monocytogenes. Firstly, a bacterial isolate was obtained from milk and identified through morphology and biochemical reactions...
December 4, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/38019370/dynamics-of-microbial-community-structure-function-and-assembly-mechanism-with-increasing-stand-age-of-slash-pine-pinus-elliottii-plantations-in-houtian-sandy-area-south-china
#24
JOURNAL ARTICLE
Xiaoyang Zhang, Si-Yi Xiong, Xiukun Wu, Bei-Bei Zeng, Yang-Mei Mo, Zhi-Cheng Deng, Qi Wei, Yang Gao, Licao Cui, Jianping Liu, Haozhi Long
Establishing slash pine plantations is the primary method for restoring sandification land in the Houtian area of South China. However, the microbial variation pattern with increasing stand age remains unclear. In this study, we investigated microbial community structure and function in bare sandy land and four stand age gradients, exploring ecological processes that determine their assembly. We did not observe a significant increase in the absolute abundance of bacteria or fungi with stand age. Bacterial communities were dominated by Chloroflexi, Actinobacteria, Proteobacteria, and Acidobacteria; the relative abundance of Chloroflexi significantly declined while Proteobacteria and Acidobacteria significantly increased with stand age...
November 29, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/38010587/development-of-a-novel-korean-h9-specific-rrt-pcr-assay-and-its-application-for-avian-influenza-virus-surveillance-in-korea
#25
JOURNAL ARTICLE
Mingeun Sagong, Yong-Myung Kang, Na Yeong Kim, Eun Bi Noh, Gyeong-Beom Heo, Se-Hee An, Youn-Jeong Lee, Young Ki Choi, Kwang-Nyeong Lee
Since the 2000s, the Y439 lineage of H9N2 avian influenza virus (AIV) has been the predominant strain circulating in poultry in Korea; however, in 2020, the Y280 lineage emerged and spread rapidly nationwide, causing large economic losses. To prevent further spread and circulation of such viruses, rapid detection and diagnosis through active surveillance programs are crucial. Here, we developed a novel H9 rRT-PCR assay that can detect a broad range of H9Nx viruses in situations in which multiple lineages of H9 AIVs are co-circulating...
November 27, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/37995085/impact-of-elevational-gradients-and-chemical-parameters-on-changes-in-soil-bacterial-diversity-under-semiarid-mountain-region
#26
JOURNAL ARTICLE
Salman Khan, Chun Han, Awais Iqbal, Chao Guan, Changming Zhao
Elevation gradients, often regarded as "natural experiments or laboratories", can be used to study changes in the distribution of microbial diversity related to changes in environmental conditions that typically occur over small geographical scales. We obtained bacterial sequences using MiSeq sequencing and clustered them into operational taxonomic units (OTUs). The total number of reads obtained by the bacterial 16S rRNA sequencing analysis was 1,090,555, with an average of approximately 45,439 reads per sample collected from various elevations...
November 23, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/37851310/the-%C3%AE-lactamase-activity-at-the-community-level-confers-%C3%AE-lactam-resistance-to-bloom-forming-microcystis-aeruginosa-cells
#27
JOURNAL ARTICLE
Yerim Park, Wonjae Kim, Minkyung Kim, Woojun Park
Many freshwater cyanobacteria, including Microcystis aeruginosa, lack several known antibiotic resistance genes; however, both axenic and xenic M. aeruginosa strains exhibited high antibiotic resistance against many antibiotics under our tested concentrations, including colistin, trimethoprim, and kanamycin. Interestingly, axenic PCC7806, although not the xenic NIBR18 and NIBR452 strains, displayed susceptibility to ampicillin and amoxicillin, indicating that the associated bacteria in the phycosphere could confer such antibiotic resistance to xenic strains...
October 18, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/37851309/flavobacterium-psychrotrophum-sp-nov-and-flavobacterium-panacagri-sp-nov-isolated-from-freshwater-and-soil
#28
JOURNAL ARTICLE
Yong-Seok Kim, Eun-Mi Hwang, Chang-Myeong Jeong, Chang-Jun Cha
Two novel bacterial strains CJ74T and CJ75T belonging to the genus Flavobacterium were isolated from freshwater of Han River and ginseng soil, South Korea, respectively. Strain CJ74T was Gram-stain-negative, aerobic, rod-shaped, non-motile, and non-flagellated, and did not produce flexirubin-type pigments. Strain CJ75T was Gram-stain-negative, aerobic, rod-shaped, motile by gliding, and non-flagellated, and produced flexirubin-type pigments. Both strains were shown to grow optimally at 30 °C in the absence of NaCl on R2A medium...
October 18, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/37843796/quantitative-analysis-of-rna-polymerase-slippages-for-production-of-p3n-pipo-trans-frame-fusion-proteins-in-potyvirids
#29
JOURNAL ARTICLE
Dongjin Choi, Yoonsoo Hahn
Potyvirids, members of the family Potyviridae, produce the P3N-PIPO protein, which is crucial for the cell-to-cell transport of viral genomic RNAs. The production of P3N-PIPO requires an adenine (A) insertion caused by RNA polymerase slippage at a conserved GAAAAAA (GA6 ) sequence preceding the PIPO open reading frame. Presently, the slippage rate of RNA polymerase has been estimated in only a few potyvirids, ranging from 0.8 to 2.1%. In this study, we analyzed publicly available plant RNA-seq data and identified 19 genome contigs from 13 distinct potyvirids...
October 16, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/37824034/comprehensive-analysis-of-gut-microbiota-alteration-in-the-patients-and-animal-models-with-polycystic-ovary-syndrome
#30
JOURNAL ARTICLE
Jing Zhou, Xuemei Qiu, Xuejing Chen, Sihan Ma, Zhaoyang Chen, Ruzhe Wang, Ying Tian, Yufan Jiang, Li Fan, Jingjie Wang
Polycystic ovary syndrome (PCOS) is a common disease of endocrine-metabolic disorder, and its etiology remains largely unknown. The gut microbiota is possibly involved in PCOS, while the association remains unclear. The comprehensive analysis combining gut microbiota with PCOS typical symptoms was performed to analyze the role of gut microbiota in PCOS in this study. The clinical patients and letrozole-induced animal models were determined on PCOS indexes and gut microbiota, and fecal microbiota transplantation (FMT) was conducted...
October 12, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/37796392/effects-of-phosphorus-dissolving-dark-septate-endophytes-on-the-growth-of-blueberry
#31
JOURNAL ARTICLE
Qixin Luo, Rui Hou, Xiaojing Shang, Si Li
Dark septate endophytes (DSEs) are widely distributed and improve plant growth. DSEs secrete large amounts of enzymes to mineralize insoluble phosphorus in soil and convert it into soluble phosphorus, promoting plant uptake of phosphorus. However, the effects of DSEs with phosphate-solubilizing ability on host plants need further study. In this study, phosphorus-dissolving DSEs were screened for growth-promoting effects. We isolated, identified and characterized three DSE species (Thozetella neonivea, Pezicula ericae and Hyaloscyphaceae sp...
October 5, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/37792248/nedd4-regulated-pyroptosis-occurred-from-co-infection-between-influenza-a-virus-and-streptococcus-pneumoniae
#32
JOURNAL ARTICLE
Jiangzhou You, Linlin Zhou, Xudong San, Hailing Li, Mingyuan Li, Baoning Wang
Co-infection of respiratory tract viruses and bacteria often result in excess mortality, especially pneumonia caused by influenza viruses and Streptococcus pneumoniae. However, the synergistic mechanisms remain poorly understood. Therefore, it is necessary to develop a clearer understanding of the molecular basis of the interaction between influenza virus and Streptococcus pneumonia. Here, we developed the BALB/c mouse model and the A549 cell model to investigate inflammation and pyroptotic cell death during co-infection...
October 4, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/37731025/erratum-to-ubcg2-up-to-date-bacterial-core-genes-and-pipeline-for-phylogenomic-analysis
#33
Jihyeon Kim, Seong-In Na, Dongwook Kim, Jongsik Chun
No abstract text is available yet for this article.
September 20, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/37713068/genetic-characteristics-and-phylogeographic-dynamics-of-echovirus
#34
JOURNAL ARTICLE
Yan Wang, Pir Tariq Shah, Yue Liu, Amina Nawal Bahoussi, Li Xing
Echoviruses belong to the genus Enterovirus in the Picornaviridae family, forming a large group of Enterovirus B (EV-B) within the Enteroviruses. Previously, Echoviruses were classified based on the coding sequence of VP1. In this study, we performed a reliable phylogenetic classification of 277 sequences isolated from 1992 to 2019 based on the full-length genomes of Echovirus. In this report, phylogenetic, phylogeographic, recombination, and amino acid variability landscape analyses were performed to reveal the evolutional characteristics of Echovirus worldwide...
September 15, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/37707763/erratum-to-introducing-ezaai-a-pipeline-for-high-throughput-calculations-of-prokaryotic-average-amino-acid-identity
#35
Dongwook Kim, Sein Park, Jongsik Chun
No abstract text is available yet for this article.
September 14, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/37707762/development-of-a-novel-d-lactic-acid-production-platform-based-on-lactobacillus-saerimneri-tbrc-5746
#36
JOURNAL ARTICLE
Kitisak Sansatchanon, Pipat Sudying, Peerada Promdonkoy, Yutthana Kingcha, Wonnop Visessanguan, Sutipa Tanapongpipat, Weerawat Runguphan, Kanokarn Kocharin
D-Lactic acid is a chiral, three-carbon organic acid, that bolsters the thermostability of polylactic acid. In this study, we developed a microbial production platform for the high-titer production of D-lactic acid. We screened 600 isolates of lactic acid bacteria (LAB) and identified twelve strains that exclusively produced D-lactic acid in high titers. Of these strains, Lactobacillus saerimneri TBRC 5746 was selected for further development because of its homofermentative metabolism. We investigated the effects of high temperature and the use of cheap, renewable carbon sources on lactic acid production and observed a titer of 99...
September 14, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/37684534/crystal-structures-of-plk1-polo-box-domain-bound-to-the-human-papillomavirus-minor-capsid-protein-l2-derived-peptide
#37
JOURNAL ARTICLE
Sujin Jung, Hye Seon Lee, Ho-Chul Shin, Joon Sig Choi, Seung Jun Kim, Bonsu Ku
Human papillomaviruses (HPVs) can increase the proliferation of infected cells during HPV-driven abnormalities, such as cervical cancer or benign warts. To date, more than 200 HPV genotypes have been identified, most of which are classified into three major genera: Alphapapillomavirus, Betapapillomavirus, and Gammapapillomavirus. HPV genomes commonly encode two structural (L1 and L2) and seven functional (E1, E2, E4-E7, and E8) proteins. L2, the minor structural protein of HPVs, not only serves as a viral capsid component but also interacts with various human proteins during viral infection...
September 8, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/37668956/prions-in-microbes-the-least-in-the-most
#38
REVIEW
Moonil Son, Sia Han, Seyeon Lee
Prions are infectious proteins that mostly replicate in self-propagating amyloid conformations (filamentous protein polymers) and consist of structurally altered normal soluble proteins. Prions can arise spontaneously in the cell without any clear reason and are generally considered fatal disease-causing agents that are only present in mammals. However, after the seminal discovery of two prions, [PSI+] and [URE3], in the eukaryotic model microorganism Saccharomyces cerevisiae, at least ten more prions have been discovered, and their biological and pathological effects on the host, molecular structure, and the relationship between prions and cellular components have been studied...
September 5, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/37665554/mycorrhizal-fungal-diversity-associated-with-six-understudied-ectomycorrhizal-trees-in-the-republic-of-korea
#39
JOURNAL ARTICLE
Ki Hyeong Park, Seung-Yoon Oh, Yoonhee Cho, Chang Wan Seo, Ji Seon Kim, Shinnam Yoo, Jisun Lim, Chang Sun Kim, Young Woon Lim
Mycorrhizal fungi are key components of forest ecosystems and play essential roles in host health. The host specificity of mycorrhizal fungi is variable and the mycorrhizal fungi composition for the dominant tree species is largely known but remains unknown for the less common tree species. In this study, we collected soil samples from the roots of six understudied ectomycorrhizal tree species from a preserved natural park in the Republic of Korea over four seasons to investigate the host specificity of mycorrhizal fungi in multiple tree species, considering the abiotic factors...
September 4, 2023: Journal of Microbiology / the Microbiological Society of Korea
https://read.qxmd.com/read/37665553/the-regulation-of-phosphorus-release-by-penicillium-chrysogenum-in-different-phosphate-via-the-tca-cycle-and-mycelial-morphology
#40
JOURNAL ARTICLE
Liyan Wang, Da Tian, Xiaoru Zhang, Mingxue Han, Xiaohui Cheng, Xinxin Ye, Chaochun Zhang, Hongjian Gao, Zhen Li
Phosphate-solubilizing fungi (PSF) efficiently dissolve insoluble phosphates through the production of organic acids. This study investigates the mechanisms of organic acid secretion by PSF, specifically Penicillium chrysogenum, under tricalcium phosphate (Ca3 (PO4 )2 , Ca-P) and ferric phosphate (FePO4 , Fe-P) conditions. Penicillium chrysogenum exhibited higher phosphorus (P) release efficiency from Ca-P (693.6 mg/L) than from Fe-P (162.6 mg/L). However, Fe-P significantly enhanced oxalic acid (1193...
September 4, 2023: Journal of Microbiology / the Microbiological Society of Korea
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