Journal of Microbiology

Review

Reverse Zoonotic Transmission of SARS-CoV-2 and Monkeypox Virus: A Comprehensive Review: Chiranjib Chakraborty, Manojit Bhattacharya, Md Aminul Islam, Hatem Zayed, Elijah Ige Ohimain, Sang-Soo Lee, Prosun Bhattacharya, Kuldeep Dhama; J. Microbiol. 2024;62(5):337-354. Published online May 23, 2024; DOI: https://doi.org/10.1007/s12275-024-00138-9

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Reverse zoonosis reveals the process of transmission of a pathogen through the human-animal interface and the spillback of the zoonotic pathogen. In this article, we methodically demonstrate various aspects of reverse zoonosis, with a comprehensive discussion of SARS-CoV-2 and MPXV reverse zoonosis. First, different components of reverse zoonosis, such as humans, different pathogens, and numerous animals (poultry, livestock, pets, wild animals, and zoo animals), have been demonstrated. Second, it explains the present status of reverse zoonosis with different pathogens during previous occurrences of various outbreaks, epidemics, and pandemics. Here, we present 25 examples from literature. Third, using several examples, we comprehensively illustrate the present status of the reverse zoonosis of SARS-CoV-2 and MPXV. Here, we have provided 17 examples of SARS-CoV-2 reverse zoonosis and two examples of MPXV reverse zoonosis. Fourth, we have described two significant aspects of reverse zoonosis: understanding the fundamental aspects of spillback and awareness. These two aspects are required to prevent reverse zoonosis from the current infection with two significant viruses. Finally, the One Health approach was discussed vividly, where we urge scientists from different areas to work collaboratively to solve the issue of reverse zoonosis.

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Development of a multiplex real-time PCR for the simultaneous detection of monkeypox virus clades I, II, and goatpox virus
Yongqiang Lin, Zijing Guo, Jinsong Chen, Xianwen Zhang, Long Zhou, Yanmin Li, Zhidong Zhang
Frontiers in Veterinary Science.2024;[Epub] CrossRef

Journal Articles

Comparative Transcriptomic Analysis of Flagellar‑Associated Genes in Salmonella Typhimurium and Its rnc Mutant: Seungmok Han , Ji-Won Byun , Minho Lee; J. Microbiol. 2024;62(1):33-48. Published online January 5, 2024; DOI: https://doi.org/10.1007/s12275-023-00099-5

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Abstract

Salmonella enterica serovar Typhimurium (S. Typhimurium) is a globally recognized foodborne pathogen that affects both animals and humans. Endoribonucleases mediate RNA processing and degradation in the adaptation of bacteria to environmental changes and have been linked to the pathogenicity of S. Typhimurium. Not much is known about the specific regulatory mechanisms of these enzymes in S. Typhimurium, particularly in the context of environmental adaptation. Thus, this study carried out a comparative transcriptomic analysis of wild-type S. Typhimurium SL1344 and its mutant (Δrnc), which lacks the rnc gene encoding RNase III, thereby elucidating the detailed regulatory characteristics that can be attributed to the rnc gene. Global gene expression analysis revealed that the Δrnc strain exhibited 410 upregulated and 301 downregulated genes (fold-change > 1.5 and p < 0.05), as compared to the wild-type strain. Subsequent bioinformatics analysis indicated that these differentially expressed genes are involved in various physiological functions, in both the wild-type and Δrnc strains. This study provides evidence for the critical role of RNase III as a general positive regulator of flagellar-associated genes and its involvement in the pathogenicity of S. Typhimurium.

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CspA regulates stress resistance, flagellar motility and biofilm formation in Salmonella Enteritidis
Xiang Li, Yan Cui, Xiaohui Sun, Chunlei Shi, Shoukui He, Xianming Shi
Food Bioscience.2025; 66: 106237. CrossRef
Influence of Flagella on Salmonella Enteritidis Sedimentation, Biofilm Formation, Disinfectant Resistance, and Interspecies Interactions
Huixue Hu, Jingguo Xu, Jingyu Chen, Chao Tang, Tianhao Zhou, Jun Wang, Zhuangli Kang
Foodborne Pathogens and Disease.2024;[Epub] CrossRef

Meiotic prophase roles of Pds5 in recombination and chromosome condensation in budding yeast: Jeong Hwan Joo , Hyun Ah Kang , Keun Pil Kim , Soogil Hong; J. Microbiol. 2022;60(2):177-186. Published online February 1, 2022; DOI: https://doi.org/10.1007/s12275-022-1635-9

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Abstract

Genetic variation in eukaryotes is mediated during meiosis by the exchange of genetic material between homologous chromosomes to produce recombinant chromosomes. Cohesin is essential to promote proper chromosome segregation, chromosome morphogenesis, and recombination in meiotic cells. Cohesin consists of three main subunits–Smc1, Smc3, and the kleisin subunit Mcd1/Scc1 (Rec8 in meiosis)–and cohesin accessory factors. In Saccharomyces cerevisiae, the cohesin regulatory subunit Pds5 plays a role in homolog pairing, meiotic axis formation, and interhomolog recombination. In this study, we examine the prophase functions of Pds5 by performing physical analysis of recombination and three-dimensional high-resolution microscopy analysis to identify its roles in meiosis-specific recombination and chromosome morphogenesis. To investigate whether Pds5 plays a role in mitoticlike recombination, we inhibited Mek1 kinase activity, which
result
ed in switching to sister template bias by Rad51-dependent recombination. Reductions in double-strand breaks and crossover products and defective interhomolog recombination occurred in the absence of Pds5. Furthermore, recombination intermediates, including single-end invasion and double-Holliday junction, were reduced in the absence of Pds5 with Mek1 kinase inactivation compared to Mek1 kinase inactivation cells. Interestingly, the absence of Pds5
result
ed in increasing numbers of chromosomes with hypercompaction of the chromosome axis. Thus, we suggest that Pds5 plays an essential role in recombination by suppressing the pairing of sister chromatids and abnormal compaction of the chromosome axis.

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RPA interacts with Rad52 to promote meiotic crossover and noncrossover recombination
Jeong H Joo, Soogil Hong, Mika T Higashide, Eui-Hwan Choi, Seobin Yoon, Min-Su Lee, Hyun Ah Kang, Akira Shinohara, Nancy Kleckner, Keun P Kim
Nucleic Acids Research.2024; 52(7): 3794. CrossRef
Cohesin is required for meiotic spindle assembly independent of its role in cohesion in C. elegans
Karen P. McNally, Elizabeth A. Beath, Brennan M. Danlasky, Consuelo Barroso, Ting Gong, Wenzhe Li, Enrique Martinez-Perez, Francis J. McNally, Sarit Smolikove
PLOS Genetics.2022; 18(10): e1010136. CrossRef
Yeast polyubiquitin unit regulates synaptonemal complex formation and recombination during meiosis
Min-Kyung Jo, Kiwon Rhee, Keun Pil Kim, Soogil Hong
Journal of Microbiology.2022; 60(7): 705. CrossRef

Review

MINIREVIEW] Fungi in salterns: Dawoon Chung† , Haryun Kim† , Hyun Seok Choi; J. Microbiol. 2019;57(9):717-724. Published online August 27, 2019; DOI: https://doi.org/10.1007/s12275-019-9195-3

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Abstract

Salterns are hypersaline extreme environments with unique physicochemical properties such as a salinity gradient. Although the investigation of microbiota in salterns has focused on archaea and bacteria, diverse fungi also thrive in the brine and soil of salterns. Fungi isolated from salterns are represented by black yeasts (Hortaea werneckii, Phaeotheca triangularis, Aureobasidium pullulans, and Trimmatostroma salinum), Cladosporium, Aspergillus, and Penicillium species. Most studies on saltern-derived fungi gave attention to black yeasts and their physiological characteristics, including growth under various culture conditions. Since then, biochemical and molecular tools have been employed to explore adaptation of these fungi to salt stress. Genome databases of several fungi in salterns are now publicly available and being used to elucidate salt tolerance mechanisms and discover the target genes for agricultural and industrial applications. Notably, the number of enzymes and novel metabolites known to be produced by diverse saltern-derived fungi has increased significantly. Therefore, fungi in salterns are not only interesting and important subjects to study fungal biodiversity and adaptive mechanisms in extreme environments, but also valuable bioresources with potential for biotechnological applications.

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Journal Articles

Structure of bacterial and eukaryote communities reflect in situ controls on community assembly in a high-alpine lake: Eli Michael S. Gendron , John L. Darcy , Katherinia Hell , Steven K. Schmidt; J. Microbiol. 2019;57(10):852-864. Published online August 3, 2019; DOI: https://doi.org/10.1007/s12275-019-8668-8

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Abstract

Recent work suggests that microbial community composition in high-elevation lakes is significantly influenced by microbes entering from upstream terrestrial and aquatic habitats. To test this idea, we conducted 18S and 16S rDNA surveys of microbial communities in a high-alpine lake in the Colorado Rocky Mountains. We compared the microbial community of the lake to water entering the lake and to uphill soils that drain into the lake. Utilizing hydrological and abiotic data, we identified potential factors controlling microbial diversity and community composition. Results show a diverse community entering the lake at the inlet with a strong resemblance to uphill terrestrial and aquatic communities. In contrast, the lake communities (water column and outlet) showed significantly lower diversity and were significantly different from the inlet communities. Assumptions of neutral community assembly poorly predicted community differences between the inlet and lake, whereas “variable selection” and “dispersal limitation” were predicted to dominate. Similarly, the lake communities were correlated with discharge rate, indicating that longer hydraulic residence times limit dispersal, allowing selective pressures within the lake to structure communities. Sulfate and inorganic nitrogen and phosphorus concentrations correlated with community composition, indicating “bottom up” controls on lake community assembly. Furthermore, bacterial community composition was correlated with both zooplankton density and eukaryotic community composition, indicating biotic controls such as “top-down” interactions also contribute to community assembly in the lake. Taken together, these community analyses suggest that deterministic biotic and abiotic selection within the lake coupled with dispersal limitation structures the microbial communities in Green Lake 4.

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Unraveling the distribution pattern and driving forces of soil microorganisms under geographic barriers
Gu Rao, Wen-Long Song, Shu-Zhen Yan, Shuang-Lin Chen, John R. Spear
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The nature of microbial diversity and assembly in the Nebraska Sandhills depends on organismal identity and habitat type
Kaitlin Gattoni, Eli M. S. Gendron, J. Parr McQueen, Kirsten Powers, Thomas O. Powers, Mary J. Harner, Jessica R. Corman, Dorota L. Porazinska
Community Ecology.2024;[Epub] CrossRef
Lakes-scale pattern of eukaryotic phytoplankton diversity and assembly process shaped by electrical conductivity in central Qinghai-Tibet Plateau
Huan Zhu, Xiong Xiong, Benwen Liu, Guoxiang Liu
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Free-Living and Particle-Associated Microbial Communities of Lake Baikal Differ by Season and Nutrient Intake
Maria Bashenkhaeva, Yelena Yeletskaya, Irina Tomberg, Artyom Marchenkov, Lubov Titova, Yuri Galachyants
Diversity.2023; 15(4): 572. CrossRef
Conservation tillage and moderate nitrogen application changed the composition, assembly pattern and interaction network of abundant and rare microbial community on straw surface
Houping Zhang, Yuanpeng Zhu, Chaoyang Yu, Yuze Li, Mei Long, Wei Li, Yuncheng Liao, Weiyan Wang, Xiaoxia Wen
Applied Soil Ecology.2023; 191: 105060. CrossRef
Sediment sulfate content determines assembly processes and network stability of bacteria communities of coastal land-based shrimp aquaculture ponds
Lianzuan Wu, Ping Yang, Linhai Zhang, Liangjuan Luo, Yan Hong, Wanyi Zhu, Lidi Zheng, Guanghui Zhao, Chuan Tong, Josep Peñuelas
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Microbial predators form a new supergroup of eukaryotes
Denis V. Tikhonenkov, Kirill V. Mikhailov, Ryan M. R. Gawryluk, Artem O. Belyaev, Varsha Mathur, Sergey A. Karpov, Dmitry G. Zagumyonnyi, Anastasia S. Borodina, Kristina I. Prokina, Alexander P. Mylnikov, Vladimir V. Aleoshin, Patrick J. Keeling
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Crossing Treeline: Bacterioplankton Communities of Alpine and Subalpine Rocky Mountain Lakes
Kim Vincent, Hannah Holland-Moritz, Adam J. Solon, Eli M. S. Gendron, Steven K. Schmidt
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Community Assembly and Co-occurrence Patterns Underlying the Core and Satellite Bacterial Sub-communities in the Tibetan Lakes
Qi Yan, Jianming Deng, Feng Wang, Yongqin Liu, Keshao Liu
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Microbial community and abiotic effects on aquatic bacterial communities in north temperate lakes
Javad Sadeghi, Subba Rao Chaganti, Abdolrazagh Hashemi Shahraki, Daniel D. Heath
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Evidence for phosphorus limitation in high-elevation unvegetated soils, Niwot Ridge, Colorado
Clifton P. Bueno de Mesquita, Laurel M. Brigham, Pacifica Sommers, Dorota L. Porazinska, Emily C. Farrer, John L. Darcy, Katharine N. Suding, Steven K. Schmidt
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Co-occurrence patterns between phytoplankton and bacterioplankton across the pelagic zone of Lake Baikal during spring: Ivan S. Mikhailov , Yuri S. Bukin , Yulia R. Zakharova , Marina V. Usoltseva , Yuri P. Galachyants , Maria V. Sakirko , Vadim V. Blinov , Yelena V. Likhoshway; J. Microbiol. 2019;57(4):252-262. Published online March 30, 2019; DOI: https://doi.org/10.1007/s12275-019-8531-y

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Abstract

Phytoplankton and bacterioplankton play a key role in carbon cycling of aquatic ecosystems. In this study, we found that co-occurrence patterns between different types of phytoplankton, bacterioplankton, and environmental parameters in Lake Baikal during spring were different over the course of three consecutive years. The composition of phytoplankton and bacterial communities was investigated using microscopy and 16S rRNA gene pyrosequencing, respectively. Non-metric multidimensional scaling (NMDS) revealed a relationship between the structure of phytoplankton and bacterial communities and temperature, location, and sampling year. Associations of bacteria with diatoms, green microalgae, chrysophyte, and cryptophyte were identified using microscopy. Cluster analysis revealed similar correlation patterns between phytoplankton abundance, number of attached bacteria, ratio of bacteria per phytoplankton cell and environmental parameters. Positive and negative correlations between different species of phytoplankton, heterotrophic bacteria and environmental parameters may indicate mutualistic or competitive relationships between microorganisms and their preferences to the environment.

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Maria N. Romanenko, Anton E. Shikov, Iuliia A. Savina, Fedor M. Shmatov, Anton A. Nizhnikov, Kirill S. Antonets
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Free-Living and Particle-Associated Microbial Communities of Lake Baikal Differ by Season and Nutrient Intake
Maria Bashenkhaeva, Yelena Yeletskaya, Irina Tomberg, Artyom Marchenkov, Lubov Titova, Yuri Galachyants
Diversity.2023; 15(4): 572. CrossRef
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Research Support, Non-U.S. Gov't

Detailed Modes of Action and Biochemical Characterization of endo-Arabinanase from Bacillus licheniformis DSM13: Jung-Mi Park , Myoung-Uoon Jang , Jung-Hyun Kang , Min-Jeong Kim , So-Won Lee , Yeong Bok Song , Chul-Soo Shin , Nam Soo Han , Tae-Jip Kim; J. Microbiol. 2012;50(6):1041-1046. Published online December 30, 2012; DOI: https://doi.org/10.1007/s12275-012-2489-3

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Abstract: An endo-arabinanase (BLABNase) gene from Bacillus licheniformis DSM13 was cloned and expressed in Escherichia coli, and the biochemical properties of its encoded enzyme were characterized. The BLABNase gene consists of a single open reading frame of 987 nucleotides that encodes 328 amino acids with a predicted molecular mass of about 36 kDa. BLABNase exhibited the highest activity against debranched α-(1,5)-arabinan in 50 mM sodium acetate buffer (pH 6.0) at 55°C. Enzymatic characterization revealed that BLABNase hydrolyzes debranched or linear arabinans with a much higher activity than branched arabinan from sugar beet. Enzymatic hydrolysis pattern analyses demonstrated BLABNase to be a typical endo-(1,5)-α-L-arabinanase (EC 3.2.1.99) that randomly cleaves the internal α-(1,5)-linked L-arabinofuranosyl residues of a branchless arabinan backbone to release arabinotriose mainly, although a small amount of arabino-oligosaccharide intermediates is also liberated. Our results indicated that BLABNase acts preferentially along with the oligosaccharides longer than arabinopentaose, thus enabling the enzymatic production of various arabinooligosaccharides.

The Schizosaccharomyces pombe Proteins that Bind to the Human HnRNPA1 Winner RNA: Kim , Jeong Kook; J. Microbiol. 1997;35(4):327-333.

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Abstract: Although extensively characterized in human cells, no heterogeneous nuclear ribonucleoprotein(hnRNP) has been found in the fission yeast Schizosaccharomyces pombe which is amenable to genetic studies and more similar to mammals than Saccharomyces cerevisiae is in terms of RNA processing. As a first step to characterize hnRNPs from S. pombe, attempt was made to find human hnRNP A1 homologs from S. pombe. The RNA molecule (A1 winner) containing the consensus high-affinity hnRNP A1 binding site (UAGGGA/U) was synthesized in vitro and used in an ultraviolet(UV) light-induced protein-RNA cross-linking assay. A number of S, pombe proteins bound to the A1 winner RNA. An approximately 50-kDa protein(p50) cross-linked more efficiently to the A1 winner RNA than other proteins. The p50 protein did not cross-link to a nonspecific RNA, but rather to the A1-5’ SS RNA in which the consensus 5’ splice junction sites of S. pombe introns were abolished. This suggests that the p50 protein, however, did not bind to the single-stranded DNA to shich the human hnRNP A1 could bind and be eluted with 0.5M NaCl. Further analysis should reveal more features of this RNA-binding protein.

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