Journal of Microbiology

Volume 57(12); December 2019

Journal Articles

[Protocol]Construction of a multicopy genomic DNA library and its application for suppression analysis: Hongbaek Cho; J. Microbiol. 2019;57(12):1041-1047. Published online November 22, 2019; DOI: https://doi.org/10.1007/s12275-019-9417-8

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Suppression analysis is used for the identification of new genes and genetic interactions when there is a notable phenotype available for genetic selection or screening. A random genomic DNA library constructed on a multi-copy plasmid is a useful tool for suppression analysis when one expects that an overdose of a few genes will suppress the phenotype. These libraries have been successfully used to determine the function of a gene by revealing genes whose functions are related to the gene of interest. They have also been used to identify the targets of chemical or biological agents by increasing the number of unaffected target gene products in a cell. In this article, I will discuss important considerations for constructing multicopy genomic DNA libraries. The protocol provided in this paper should be a useful guide for constructing genomic DNA libraries in many bacterial species for which multi-copy plasmids are available.

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Identification and characterization of the lipoprotein N -acyltransferase in Bacteroides
Krista M. Armbruster, Jiawen Jiang, Mariana G. Sartorio, Nichollas E. Scott, Jenna M. Peterson, Jonathan Z. Sexton, Mario F. Feldman, Nicole M. Koropatkin
Proceedings of the National Academy of Sciences.2024;[Epub] CrossRef

Hahyoungchilella caricis gen. nov., sp. nov., isolated from a rhizosphere mudflat of a halophyte (Carex scabrifolia), transfer of Thioclava arenosa Thongphrom et al. 2017 to Pseudothioclava as Pseudothioclava arenosa gen. nov., comb. nov. and proposal of Thioclava electrotropha Chang et al. 2018: Young-Ju Kim , Soon Dong Lee; J. Microbiol. 2019;57(12):1048-1055. Published online September 25, 2019; DOI: https://doi.org/10.1007/s12275-019-9260-y

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A Gram-stain-negative, strictly aerobic, marine bacterium, designated GH2-2T, was isolated from a rhizosphere mudflat of a halophyte (Carex scabrifolia) in Gangwha Island, the Republic of Korea. The cells of the organism were oxidase- positive, catalase-positive, flagellated, short rods that grew at 10–40°C, pH 4–10, and 0–13% (w/v) NaCl. The predominant ubiquinone was Q-10. The major polar lipids were phosphatidylcholine, phosphatidylethanolamine, and phosphatidylglycerol. The major fatty acid is C18:1. Phylogenetic analysis based on 16S rRNA gene sequences revealed that the novel isolate formed an independent lineage at the base of the radiation encompassing members of the genus Thioclava, except for Thioclava arenosa. The closest relatives were T. nitratireducens (96.03% sequence similarity) and T. dalianensis (95.97%). The genome size and DNA G+C content were 3.77 Mbp and 59.6 mol%, respectively. Phylogenomic analysis supported phylogenetic distinctness based on 16S rRNA gene sequences. Average nucleotide identity values were 73.6–74.0% between the novel strain and members of the genus Thioclava. On the basis of data obtained from a polyphasic approach, the strain GH2-2T (= KCTC 62124T = DSM 105743T) represents a novel species of a new genus for which the name Hahyoungchilella caricis gen. nov., sp. nov. is proposed. Moreover, the transfer of Thioclava arenosa Thongphrom et al. 2017 to Pseudothioclava gen. nov. as Pseudothioclava arenosa comb. nov. is also proposed. Finally, Thioclava electrotropha Chang et al. 2018 is proposed to be a later heterosynonym of Thioclava sediminum Liu et al. 2017.

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Genome-based analysis of the family Paracoccaceae and description of Ostreiculturibacter nitratireducens gen. nov., sp. nov., isolated from an oyster farm on a tidal flat
Zhaobin Huang, Meiqin Li, Aharon Oren, Qiliang Lai
Frontiers in Microbiology.2024;[Epub] CrossRef
Sustainable agricultural management of saline soils in arid and semi-arid Mediterranean regions through halophytes, microbial and soil-based technologies
Salvadora Navarro-Torre, Pedro Garcia-Caparrós, Amaia Nogales, Maria Manuela Abreu, Erika Santos, Ana Lúcia Cortinhas, Ana Delaunay Caperta
Environmental and Experimental Botany.2023; 212: 105397. CrossRef
Notification of changes in taxonomic opinion previously published outside the IJSEM
Aharon Oren, George Garrity
International Journal of Systematic and Evolutionary Microbiology .2020; 70(7): 4061. CrossRef
List of new names and new combinations previously effectively, but not validly, published
Aharon Oren, George Garrity
International Journal of Systematic and Evolutionary Microbiology .2020; 70(7): 4043. CrossRef

Soft sweep development of resistance in Escherichia coli under fluoroquinolone stress: Xianxing Xie , Ruichen Lv , Chao Yang , Yajun Song , Yanfeng Yan , Yujun Cui , Ruifu Yang; J. Microbiol. 2019;57(12):1056-1064. Published online September 25, 2019; DOI: https://doi.org/10.1007/s12275-019-9177-5

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We employed a stepwise selection model for investigating the dynamics of antibiotic-resistant variants in Escherichia coli K-12 treated with increasing concentrations of ciprofloxacin (CIP). Firstly, we used Sanger sequencing to screen the variations in the fluoquinolone target genes, then, employed Illumina NGS sequencing for amplicons targeted regions with variations. The results demonstrated that variations G81C in gyrA and K276N and K277L in parC are standing resistance variations (SRVs), while S83A and S83L in gyrA and G78C in parC were emerging resistance variations (ERVs). The variants containing SRVs and/or ERVs were selected successively based on their sensitivities to CIP. Variant strain 1, containing substitution G81C in gyrA, was immediately selected following ciprofloxacin exposure, with obvious increases in the parC SRV, and parC and gyrA ERV allele frequencies. Variant strain 2, containing the SRVs, then dominated the population following a 20× increase in ciprofloxacin concentration, with other associated allele frequencies also elevated. Variant strains 3 and 4, containing ERVs in gyrA and parC, respectively, were then selected at 40× and 160× antibiotic concentrations. Two variants, strains 5 and 6, generated in the selection procedure, were lost because of higher fitness costs or a lower level of resistance compared with variants 3 and 4. For the second induction, all variations/indels were already present as SRVs and selected out step by step at different passages. Whatever the first induction or second induction, our results confirmed the soft selective sweep hypothesis and provided critical information for guiding clinical treatment of pathogens containing SRVs.

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Could traces of fluoroquinolones in food induce ciprofloxacin resistance in Escherichia coli and Klebsiella pneumoniae ? An in vivo study in Galleria mellonel
Zina Gestels, Yuliia Baranchyk, Dorien Van den Bossche, Jolein Laumen, Said Abdellati, Basil Britto Xavier, Sheeba Santhini Manoharan-Basil, Chris Kenyon, Sadjia Bekal, Mustafa Sadek
Microbiology Spectrum.2024;[Epub] CrossRef

Flavobacterium zhairuonensis sp. nov., a gliding bacterium isolated from marine sediment of the East China Sea: Sanjit Chandra Debnath , Ahmed Mohammed Abdo Miyah , Can Chen , Huan Sheng , Xue-Wei Xu , Yue-Hong Wu , Dao-Qiong Zheng , Jin-Zhong Xu , Ya-Nan Di , Pin-Mei Wang , Li Shen; J. Microbiol. 2019;57(12):1065-1072. Published online September 27, 2019; DOI: https://doi.org/10.1007/s12275-019-9194-4

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A yellow pigmented, Gram-stain-negative, aerobic bacterium designated A5.7T was studied to evaluate the taxonomic position following the modern polyphasic approach. The strain was isolated from sediments near Zhairuo Island, which is situated in the East China Sea. Cells were non-spore forming rods without flagella but showed motility by gliding. Growth was observed at 15–35°C (optimum 28°C), pH 6.0–9.0 (optimum pH 6.5) and 0–2% (w/v) NaCl (optimum 0–0.5%) in LB broth. The major respiratory quinone of A5.7T was menaquinone 6. The major polar lipid of A5.7T was phosphatidylethanolamine and the predominant fatty acids (> 5%) were iso-C15:0, iso-C17:0 3-OH, C15:1 ω6c, iso-C15:0 3-OH, iso-C15:1 G, summed feature 3 (C16:1 ω7c and/or C16:1 ω6c) and summed feature 9 (iso-C17:1 ω9c and/or C16:0 10-methyl). Phylogenetic analysis based on 16S rRNA gene sequences showed that the isolate belongs to the genus Flavobacterium and shares the highest sequence similarities with Flavobacterium sharifuzzamanii A7.6T (98.5%), Flavobacterium tistrianum GB 56.1T (98.3%), Flavobacterium nitrogenifigens NXU-44T (97.8%), Flavobacterium anhuiense D3T (97.6%), Flavobacterium ginsenosidimutans THG 01T (97.6%), and Flavobacterium foetidum CJ42T (97.6%). Digital DNA-DNA hybridization and average nucleotide identity values between the strain and its closest phylogenetic neighbors showed the ranges from 19.6 to 34.1% and 73.7 to 87.9%, respectively. Therefore, based on polyphasic characteristics, strain A5.7T represents a novel species of the genus Flavobacterium for which the name Flavobacterium zhairuonensis sp. nov. is proposed. The type strain is A5.7T (= KCTC 62406T = MCCC 1K03494T).

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Three novel species of the genus Flavobacterium, Flavobacterium odoriferum sp. nov., Flavobacterium fragile sp. nov. and Flavobacterium luminosum sp. nov., isolated from activated sludge
Qi Ran, Xinran Du, Lin Han, Jingjing Wang, Yue-zhong Li
International Journal of Systematic and Evolutionary Microbiology .2024;[Epub] CrossRef
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Hyunyoung Jo, Miri S. Park, Yeonjung Lim, Ilnam Kang, Jang-Cheon Cho
Journal of Microbiology.2023; 61(5): 495. CrossRef
Description of Flavobacterium cyclinae sp. nov. and Flavobacterium channae sp. nov., isolated from the intestines of Cyclina sinensis (Corb shell) and Channa argus (Northern snakehead)
Seomin Kang, Jae-Yun Lee, Jeong Eun Han, Yun-Seok Jeong, Do-Hun Gim, Jin-Woo Bae
Journal of Microbiology.2022; 60(9): 890. CrossRef
Flavobacterium litorale sp. nov., isolated from red alga
Neak Muhammad, Ho Le Han, Yong-Jae Lee, Jaeho Ko, Tra T. H. Nguyen, Song-Gun Kim
International Journal of Systematic and Evolutionary Microbiology .2022;[Epub] CrossRef
Flavobacterium salilacus sp. nov., isolated from surface water of a hypersaline lake, and descriptions of Flavobacterium salilacus subsp. altitudinum subsp. nov. and Flavobacterium salilacus subsp. salilacus subsp. nov.
Sanjit Chandra Debnath, Can Chen, Ishrat Khan, Wen-Jie Wang, Dao-Qiong Zheng, Jin-Zhong Xu, Pin-Mei Wang
International Journal of Systematic and Evolutionary Microbiology .2020; 70(7): 4250. CrossRef
List of new names and new combinations previously effectively, but not validly, published
Aharon Oren, George Garrity
International Journal of Systematic and Evolutionary Microbiology .2020; 70(3): 1443. CrossRef
Flavobacterium phycosphaerae sp. nov. isolated from the phycosphere of Microcystis aeruginosa
Minkyung Kim, Byoung-Hee Lee, Ki-Eun Lee, Woojun Park
International Journal of Systematic and Evolutionary Microbiology .2019;[Epub] CrossRef

Anaerotignum faecicola sp. nov., isolated from human faeces: Seung-Hyeon Choi , Ji-Sun Kim , Jam-Eon Park , Keun Chul Lee , Mi Kyung Eom , Byeong Seob Oh , Seung Yeob Yu , Se Won Kang , Kook-Il Han , Min Kuk Suh , Dong Ho Lee , Hyuk Yoon , Byung-Yong Kim , Je Hee Lee , Ju Huck Lee , Jung-Sook Lee , Seung-Hwan Park; J. Microbiol. 2019;57(12):1073-1078. Published online November 4, 2019; DOI: https://doi.org/10.1007/s12275-019-9268-3

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Abstract

A strictly anaerobic bacterium, designated as strain KGMB- 03357T, was isolated from the faeces of a healthy Korean selected by Bundang Seoul National University based on health status. Cells of strain KGMB03357T are Gram-stain-positive, non-motile, non-spore-forming, and observed as straight or curved rods. The isolate grew at 10–45°C (optimum temperature of 40°C) and a pH range of 5.1–10.5 (optimum pH of 6.8). Analysis of phylogenetic trees based on the 16S rRNA gene sequences revealed that strain KGMB03357T forms a lineage within the genus Anaerotignum, and is most closely related to Anaerotignum lactatifermentans G17T (= KCTC 15066T, 96.1%), Anaerotignum propionicum DSM 1682T (= KCTC 5582T, 94.9%), Anaerotignum neopropionicum DSM 03847T (= KCTC 15564T, 94.9%), and Anaerotignum aminivorans SH021T (= KCTC 15705T, 94.8%). The ANI values between strain KGMB 03357T and members of the genus Anaerotignum were 73.3–71.0%, which are below the ANI criterion for interspecies identity. The DNA G + C content based on the whole-genome sequence is 47.3 mol%. The major cellular fatty acids of strain KGMB03357T are C16:0, C18:0, C18:1 cis 9, and anteiso-C15:0. Strain KGMB03357T contains meso-diaminopimelic acid as the diagnostic amino acid in the cell wall peptidoglycan. Based on the phenotypic, phylogenetic, and genomic properties, strain KGMB 03357T represents a novel species of the genus Anaerotignum, for which the name Anaerotignum faecicola sp. nov. is proposed. The type strain is KGMB03357T (= KCTC 15736T = DSM 107953T).

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Chris Major Ncho, Akshat Goel, Vaishali Gupta, Chae-Mi Jeong, Ji-Young Jung, Si-Young Ha, Jae-Kyung Yang, Yang-Ho Choi
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Shishi Huang, Yuan Zou, Hongbiao Tang, Jingyu Zhuang, Zhiwei Ye, Tao Wei, Junfang Lin, Qianwang Zheng
Journal of the Science of Food and Agriculture.2023; 103(4): 1885. CrossRef
Anaeropeptidivorans aminofermentans gen. nov., sp. nov., a mesophilic proteolytic salt-tolerant bacterium isolated from a laboratory-scale biogas fermenter, and emended description of Clostridium colinum
Nora Köller, Sarah Hahnke, Vladimir Zverlov, Daniel Wibberg, Andreas Klingl, Tobias Busche, Michael Klocke, Alfred Pühler, Andreas Schlüter, Wolfgang Liebl, Irena Maus
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Chakrabartyella piscis gen. nov., sp. nov., a member of the family Lachnospiraceae, isolated from the hindgut of the marine herbivorous fish Kyphosus sydneyanus
Bikiran Pardesi, Anthony M. Roberton, Emily M. Wollmuth, Esther R. Angert, Douglas I. Rosendale, William Lindsey White, Kendall D. Clements
International Journal of Systematic and Evolutionary Microbiology .2023;[Epub] CrossRef
New Insights into the Physiology of the Propionate Producers Anaerotignum propionicum and Anaerotignum neopropionicum (Formerly Clostridium propionicum and Clostridium neopropionicum)
Tina Baur, Peter Dürre
Microorganisms.2023; 11(3): 685. CrossRef
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Erik Munson, Karen C. Carroll, Romney M. Humphries
Journal of Clinical Microbiology.2023;[Epub] CrossRef
Genome-scale metabolic modelling enables deciphering ethanol metabolism via the acrylate pathway in the propionate-producer Anaerotignum neopropionicum
Sara Benito-Vaquerizo, Ivette Parera Olm, Thijs de Vroet, Peter J. Schaap, Diana Z. Sousa, Vitor A. P. Martins dos Santos, Maria Suarez-Diez
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Nicholas A. Lesniak, Alyxandria M. Schubert, Kaitlin J. Flynn, Jhansi L. Leslie, Hamide Sinani, Ingrid L. Bergin, Vincent B. Young, Patrick D. Schloss, Martin J. Blaser
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Flavobacterium humi sp. nov., a flexirubin-type pigment producing bacterium, isolated from soil: Inhyup Kim , Jiyoun Kim , Geeta Chhetri , Taegun Seo; J. Microbiol. 2019;57(12):1079-1085. Published online November 22, 2019; DOI: https://doi.org/10.1007/s12275-019-9350-x

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Abstract

A yellow pigmented, Gram-stain-negative, strictly aerobic, rod-shaped, motile by means of gliding, catalase and oxidase positive bacterium, designated strain DS2-AT, was isolated from soil. Growth was observed at 4–32°C (optimum, 28°C), pH 6–9 (optimum, 7.0), and with 0–0.25% (w/v) NaCl (optimum, 0%). Phylogenetic analysis of 16S rRNA gene sequence revealed that strain DS2-AT belonged to the genus Flavobacterium and was most closely related to Flavobacterium aquatile LMG 4008T (96.4%), Flavobacterium terrae DSM 18829T (95.6%), Flavobacterium vireti THG-SM1T (95.5%), Flavobacterium inkyongense IMCC27201T (95.4%), Flavobacterium brevivitae TTM-43T (95.2%), and Flavobacterium cucumis DSM 18830T (95.2%). Strain DS2-AT produces flexirubin- type pigments. The major fatty acids were iso-C15:0, iso-C17:0 3-OH, and iso-C15:0 3-OH. The major respiratory quinone was identified as menaquinone-6. The major polar lipid was found to be phosphatidylethanolamine. The average nucleotide identity values between strain DS2-AT and selected taxa, F. aquatile LMG 4008T, F. terrae DSM 18829T, and F. cucumis DSM 18830T, were 72, 72.7, and 71.6%, respectively. The draft genome of strain DS2-AT has a number of 14 contigs, scaffold N50 of 476,310 bp and a total size of 3,563,867 bp. Additionally, strain DS2-AT contains 3,127 of gene, 41 of tRNA, 6 of rRNA, and 3 of ncRNA. The DNA G + C content of stain DS2-AT was 40.7 mol%. Based on phylogenetic and phenotypic analyses, strain DS2-AT is considered as a novel species of the genus Flavobacterium, for which the name Flavobacterium humi sp. nov., (type strain DS2-AT = KACC 19715T = JCM 32786T) has been proposed.

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Muhammad Ramziuddin Zakaria, Maša Vodovnik, Maša Zorec, Kok Jun Liew, Lili Tokiman, Chun Shiong Chong
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Paenibacillus suaedae sp. nov. and Paenibacillus violae sp. nov., isolated from the roots of Suaeda japonica Makino and Viola mandshurica W. Becker with plant growth-promoting potential
Inhyup Kim, Sunho Park, Yonghee Jung, Haejin Woo, Hyunji Lee, Subin Yook, Taegun Seo
International Journal of Systematic and Evolutionary Microbiology .2024;[Epub] CrossRef
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Ideonella oryzae sp. nov., isolated from soil, and Spirosoma liriopis sp. nov., isolated from fruits of Liriope platyphylla
Yonghee Jung, Geeta Chhetri, Inhyup Kim, Yoonseop So, Sunho Park, Taegun Seo
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Neoroseomonas alba sp. nov., Neoroseomonas nitratireducens sp. nov., Paraoseomonas indoligenes sp. nov and Paraoseomonas baculiformis sp. nov., isolated from the rhizosphere of paddy soil
Yoonseop So, Geeta Chhetri, Inhyup Kim, Jiyoun Kim, Sunho Park, Yonghee Jung, Taegun Seo
Antonie van Leeuwenhoek.2023; 116(10): 1009. CrossRef
Halomonas antri sp. nov., a carotenoid-producing bacterium isolated from surface seawater
Yoonseop So, Geeta Chhetri, Inhyup Kim, Minchung Kang, Jiyoun Kim, Byungjo Lee, Wonhee Jang, Taegun Seo
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Devosia rhizoryzae sp. nov., and Devosia oryziradicis sp. nov., novel plant growth promoting members of the genus Devosia, isolated from the rhizosphere of rice plants
Geeta Chhetri, Inhyup Kim, Minchung Kang, Jiyoun Kim, Yoonseop So, Taegun Seo
Journal of Microbiology.2022; 60(1): 1. CrossRef
An Isolated Arthrobacter sp. Enhances Rice (Oryza sativa L.) Plant Growth
Geeta Chhetri, Inhyup Kim, Minchung Kang, Yoonseop So, Jiyoun Kim, Taegun Seo
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Chryseobacterium tagetis sp. nov., a plant growth promoting bacterium with an antimicrobial activity isolated from the roots of medicinal plant (Tagetes patula)
Geeta Chhetri, Inhyup Kim, Jiyoun Kim, Yoonseop So, Taegun Seo
The Journal of Antibiotics.2022; 75(6): 312. CrossRef
Sphingosinicella flava sp. nov., indole acetic acid producing bacteria isolated from maize field soil
Geeta Chhetri, Minchung Kang, Jiyoun Kim, Inhyup Kim, Yoonseop So, Taegun Seo
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Fuscibacter oryzae gen. nov., sp. nov., a phosphate-solubilizing bacterium isolated from the rhizosphere of rice plant
Geeta Chhetri, Minchung Kang, Jiyoun Kim, Inhyup Kim, Yoonseop So, Taegun Seo
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Geeta Chhetri, Inhyup Kim, Jiyoun Kim, Minchung Kang, Taegun Seo
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Flavobacterium tagetis sp. nov., a novel urea-hydrolysing bacterium isolated from the roots of Tagetes patula
Geeta Chhetri, Inhyup Kim, Minchung Kang, Jiyoun Kim, Yoonseop So, Taegun Seo
International Journal of Systematic and Evolutionary Microbiology .2021;[Epub] CrossRef
Characterization of Phosphate Solubilising Bacteria Isolated from Rhizosphere Soils of Piper nigrum L.
Ashritha ., B. Raghavendr, M. Ramya Rai, P. Nagaraj, P. Visweswara
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Nocardioides donggukensis sp. nov. and Hyunsoonleella aquatilis sp. nov., isolated from Jeongbang Waterfall on Jeju Island
Inhyup Kim, Geeta Chhetri, Jiyoun Kim, Minchung Kang, Yoonseop So, Byungjo Lee, Wonhee Jang, Taegun Seo
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Adhaeribacter rhizoryzae sp. nov., a fibrillar matrix-producing bacterium isolated from the rhizosphere of rice plant
Geeta Chhetri, Jiyoun Kim, Inhyup Kim, Byungjo Lee, Wonhee Jang, Taegun Seo
International Journal of Systematic and Evolutionary Microbiology .2020; 70(10): 5382. CrossRef
Reinekea thalattae sp. nov., a New Species of the Genus Reinekea Isolated from Surface Seawater in Sehwa Beach
Inhyup Kim, Geeta Chhetri, Jiyoun Kim, Minchung Kang, Taegun Seo
Current Microbiology.2020; 77(12): 4174. CrossRef
Flavobacterium alkalisoli sp. nov., isolated from rhizosphere soil of Suaeda salsa
Lian Xu, Hai-Tao Wang, Jin-Xin Zhang, Hui Zhang, Shuai Wang, Ji-Quan Sun
International Journal of Systematic and Evolutionary Microbiology .2020; 70(6): 3888. CrossRef
Lewinella aurantiaca sp. nov., a carotenoid pigment-producing bacterium isolated from surface seawater
Inhyup Kim, Geeta Chhetri, Jiyoun Kim, Minchung Kang, Taegun Seo
International Journal of Systematic and Evolutionary Microbiology .2020; 70(12): 6180. CrossRef
Flavobacterium baculatum sp. nov., a carotenoid and flexirubin-type pigment producing species isolated from flooded paddy field
Geeta Chhetri, Jiyoun Kim, Inhyup Kim, Minchung Kang, Byungjo Lee, Wonhee Jang, Taegun Seo
International Journal of Systematic and Evolutionary Microbiology .2019;[Epub] CrossRef

Partial characteristics of hemolytic factors secreted from airborne Aspergillus and Penicillium, and an enhancement of hemolysis by Aspergillus micronesiensis CAMP-like factor via Staphylococcus aureus-sphingomyelinase: Sumonrat Kaveemongkonrat , Kwanjit Duangsonk , Jos Houbraken , Phimchat Suwannaphong , Nongnuch Vanittanakom Vanittanakom , Malee Mekaprateep; J. Microbiol. 2019;57(12):1086-1094. Published online November 4, 2019; DOI: https://doi.org/10.1007/s12275-019-9133-4

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Abstract

One of the advantages for initial survival of inhaled fungal spores in the respiratory tract is the ability for iron acquisition via hemolytic factor-production. To examine the ability of indoor Aspergillus and Penicillium affecting hemolysis, the secreted factors during the growth of thirteen strains from eight species were characterized in vitro for their hemolytic activity (HA) and CAMP-like reaction. The hemolytic index of HA on human blood agar of Aspergillus micronesiensis, Aspergillus wentii, Aspergillus westerdijkiae, Penicillium citrinum, Penicillium copticola, Penicillium paxilli, Penicillium steckii, and Penicillium sumatrense were 1.72 ± 0.34, 1.61 ± 0.41, 1.69 ± 0.16, 1.58 ± 0.46, 3.10 ± 0.51, 1.22 ± 0.19, 2.55 ± 0.22, and 1.90 ± 0.14, respectively. The secreted factors of an Aspergillus wentii showed high HA when grown in undernourished broth at 25°C at an exponential phase and were heat sensitive. Its secreted proteins have an estimated relative molecular weight over 50 kDa. Whereas, the factors of Penicillium steckii were secreted in a similar condition at a late exponential phase but showed low HA and heat tolerance. In a CAMP-like test with sheep blood, the synergistic hemolytic reactions between most tested mold strains and Staphylococcus aureus were identified. Moreover, the enhancement of α-hemolysis of Staphylococcus aureus could occur through the interaction of Staphylococcus aureus-sphingomyelinase and CAMP-like factors secreted from Aspergillus micronesiensis. Further studies on the characterization of purified hemolytic- and CAMP-like-factors secreted from Aspergillus wentii and Aspergillus micronesiensis may lead to more understanding of their involvement of hemolysis

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Green Synthesis of Endolichenic Fungi Functionalized Silver Nanoparticles: The Role in Antimicrobial, Anti-Cancer, and Mosquitocidal Activities
Yugal Kishore Mohanta, Debasis Nayak, Awdhesh Kumar Mishra, Ishani Chakrabartty, Manjit Kumar Ray, Tapan Kumar Mohanta, Kumananda Tayung, Rajapandian Rajaganesh, Murugan Vasanthakumaran, Saravanan Muthupandian, Kadarkarai Murugan, Gouridutta Sharma, Hans-
International Journal of Molecular Sciences.2022; 23(18): 10626. CrossRef
Group B Streptococcus CAMP Factor Does Not Contribute to Interactions with the Vaginal Epithelium and Is Dispensable for Vaginal Colonization in Mice
Mallory B. Ballard, Vicki Mercado-Evans, Madelynn G. Marunde, Hephzibah Nwanosike, Jacob Zulk, Kathryn A. Patras, Mariola J. Edelmann
Microbiology Spectrum.2021;[Epub] CrossRef

H2 Metabolism revealed by metagenomic analysis of subglacial sediment from East Antarctica: Zhifeng Yang , Yu Zhang , Yongxin Lv , Wenkai Yan , Xiang Xiao , Bo Sun , Hongmei Ma; J. Microbiol. 2019;57(12):1095-1104. Published online November 22, 2019; DOI: https://doi.org/10.1007/s12275-019-9366-2

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Abstract

Subglacial ecosystems harbor diverse chemoautotrophic microbial communities in areas with limited organic carbon, and lithological H2 produced during glacial erosion has been considered an important energy source in these ecosystems. To verify the H2-utilizing potential there and to identify the related energy-converting metabolic mechanisms of these communities, we performed metagenomic analysis on subglacial sediment samples from East Antarctica with and without H2 supplementation. Genes coding for several [NiFe]- hydrogenases were identified in raw sediment and were enriched after H2 incubation. All genes in the dissimilatory nitrate reduction and denitrification pathways were detected in the subglacial community, and the genes coding for these pathways became enriched after H2 was supplied. Similarly, genes transcribing key enzymes in the Calvin cycle were detected in raw sediment and were also enriched. Moreover, key genes involved in H2 oxidization, nitrate reduction, oxidative phosphorylation, and the Calvin cycle were identified within one metagenome-assembled genome belonging to a Polaromonas sp. As suggested by our results, the microbial community in the subglacial environment we investigated consisted of chemoautotrophic populations supported by H2 oxidation. These results further confirm the importance of H2 in the cryosphere.

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Microbial genetic potential differs among cryospheric habitats of the Damma glacier
Maomao Feng, Serina Robinson, Weihong Qi, Arwyn Edwards, Beat Stierli, Marcel van der Heijden, Beat Frey, Gilda Varliero
Microbial Genomics .2024;[Epub] CrossRef
Inorganic carbon metabolism enhanced hydrogen-driven denitrification: Evaluation of carbon fixation pathways and microbial traits
Puchun Wang, Yang Wu, Lan Yang, Xiong Zheng, Min Long, Yinguang Chen
Chemical Engineering Journal.2024; 497: 154528. CrossRef
The response of C/N/S cycling functional microbial communities to redox conditions in shallow aquifers using in-situ sediment as bio-trap matrix
Cui Li, Rong Chen, Weiwei Ouyang, Chen Xue, Minghui Liu, Hui Liu
Environmental Technology.2024; 45(18): 3666. CrossRef
Glacial Water: A Dynamic Microbial Medium
Gilda Varliero, Pedro H. Lebre, Beat Frey, Andrew G. Fountain, Alexandre M. Anesio, Don A. Cowan
Microorganisms.2023; 11(5): 1153. CrossRef
Microbial Community Structure and Metabolic Potential at the Initial Stage of Soil Development of the Glacial Forefields in Svalbard
Chen Tian, Yongxin Lv, Zhifeng Yang, Ruifeng Zhang, Zhuoyi Zhu, Hongmei Ma, Jing Li, Yu Zhang
Microbial Ecology.2023; 86(2): 933. CrossRef
Aerobic hydrogen-oxidizing bacteria in soil: from cells to ecosystems
Xinyun Fan, Xuemeng Zhang, Guohua Zhao, Xin Zhang, Lei Dong, Yinguang Chen
Reviews in Environmental Science and Bio/Technology.2022; 21(4): 877. CrossRef
Prokaryotic community and diversity in coastal surface waters along the Western Antarctic Peninsula
Rafet Cagri Ozturk, Ali Muzaffer Feyzioglu, Ilhan Altinok
Polar Science.2022; 31: 100764. CrossRef
Shotgun metagenomics reveals distinct functional diversity and metabolic capabilities between 12 000-year-old permafrost and active layers on Muot da Barba Peider (Swiss Alps)
Carla Perez-Mon, Weihong Qi, Surendra Vikram, Aline Frossard, Thulani Makhalanyane, Don Cowan, Beat Frey
Microbial Genomics .2021;[Epub] CrossRef
Global modeling of hydrogen using GFDL-AM4.1: Sensitivity of soil removal and radiative forcing
Fabien Paulot, David Paynter, Vaishali Naik, Sergey Malyshev, Raymond Menzel, Larry W. Horowitz
International Journal of Hydrogen Energy.2021; 46(24): 13446. CrossRef
Lithogenic hydrogen supports microbial primary production in subglacial and proglacial environments
Eric C. Dunham, John E. Dore, Mark L. Skidmore, Eric E. Roden, Eric S. Boyd
Proceedings of the National Academy of Sciences.2021;[Epub] CrossRef

Vibrio parahaemolyticus cqsA controls production of quorum sensing signal molecule 3-hydroxyundecan-4-one and regulatessensing signal molecule 3-hydroxyundecan-4-one and regulates colony morphology: Kui Wu , Yangyun Zheng , Qingping Wu , Haiying Chen , Songzhe Fu , Biao Kan , Yongyan Long , Xiansheng Ni , Junling Tu; J. Microbiol. 2019;57(12):1105-1114. Published online November 4, 2019; DOI: https://doi.org/10.1007/s12275-019-9379-x

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Abstract

In order to adapt to different environments, Vibrio parahaemolyticus employed a complicated quorum sensing system to orchestrate gene expression and diverse colony morphology patterns. In this study, the function of the putative quorum sensing signal synthase gene cqsA (VPA0711 in V. parahaemolyticus strain RIMD2210633 genome) was investigated. The cloning and expression of V. parahaemolyticus cqsA in Escherichia coli system induced the production of a new quorum sensing signal that was found in its culture supernatant. The signal was purified by high performance liquid chromatography
methods
and determined to be 3-hydroxyundecan- 4-one by indirect and direct mass spectra assays. The deletion of cqsA in RIMD2210633 changed V. parahaemolyticus colony morphology from the classical ‘fried-egg’ shape (thick and opaque in the center, while thin and translucent in the edge) of the wild-type colony to a ‘pancake’ shape (no significant difference between the centre and the edge) of the cqsAdeleted colony. This morphological change could be restored by complementary experiment with cqsA gene or the signal extract. In addition, the expression of opaR, a well-known quorum sensing regulatory gene, could be up-regulated by cqsA deletion. Our results suggested that V. parahaemolyticus used cqsA to produce 3-hydroxyundecan-4-one signal and thereby regulated colony morphology and other quorum sensing-associated behaviors.

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Antimicrobial resistance, virulence factors and phylogenetic profiles of Vibrio parahaemolyticus in the eastern coast of Shenzhen
Xian Qiang Lian, Guo Dong Liu, Miao Fen Huang, Qiu Hua Fan, Zi Dan Lin
Frontiers in Microbiology.2024;[Epub] CrossRef
Quorum sensing signal synthases enhance Vibrio parahaemolyticus swarming motility
Fuwen Liu, Fei Wang, Yixuan Yuan, Xiaoran Li, Xiaojun Zhong, Menghua Yang
Molecular Microbiology.2023; 120(2): 241. CrossRef
Regulation of Virulence Factors Expression During the Intestinal Colonization of Vibrio parahaemolyticus
Jingyu Wang, Yuming Zhan, Han Sun, Xiaodan Fu, Qing Kong, Changliang Zhu, Haijin Mou
Foodborne Pathogens and Disease.2022; 19(3): 169. CrossRef
Supplementation of ex situ produced bioflocs improves immune response against AHPND in Pacific whiteleg shrimp (Litopenaeus vannamei) postlarvae
Magdalena Lenny Situmorang, Umaporn Uawisetwathana, Sopacha Arayamethakorn, Nitsara Karoonuthaisiri, Wanilada Rungrassamee, Haniswita Haniswita, Peter Bossier, Gede Suantika
Applied Microbiology and Biotechnology.2022; 106(9-10): 3751. CrossRef
A novel finding of intra-genus inhibition of quorum sensing in Vibrio bacteria
Huong Thanh Hoang, Thuy Thu Thi Nguyen, Ha Minh Do, Thao Kim Nu Nguyen, Hai The Pham
Scientific Reports.2022;[Epub] CrossRef
CqsA-introduced quorum sensing inhibits type VI secretion system 2 through an OpaR-dependent pathway in Vibrio parahaemolyticus
Kui Wu, Yongyan Long, Qian Liu, Wei Wang, Guoyin Fan, Hui Long, Yangyun Zheng, Xiansheng Ni, Shengen Chen, Haiying Chen, Shufen Shuai
Microbial Pathogenesis.2022; 162: 105334. CrossRef
CqsA inhibits the virulence of Vibrio harveyi to the pearl gentian grouper (♀Epinephelus fuscoguttatus × ♂Epinephelus lanceolatus)
Yaqiu Zhang, Yiqin Deng, Juan Feng, Zhixun Guo, Can Mao, Haoxiang Chen, Ziyang Lin, Jianmei Hu, Youlu Su
Aquaculture.2021; 535: 736346. CrossRef
Identification of LuxR Family Regulators That Integrate Into Quorum Sensing Circuit in Vibrio parahaemolyticus
Xiaojun Zhong, Ranran Lu, Fuwen Liu, Jinjie Ye, Junyang Zhao, Fei Wang, Menghua Yang
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Adaptations of Vibrio parahaemolyticus to Stress During Environmental Survival, Host Colonization, and Infection
Gururaja Perumal Pazhani, Goutam Chowdhury, Thandavarayan Ramamurthy
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Vibrio alginolyticus influences quorum sensing-controlled phenotypes of acute hepatopancreatic necrosis disease-causing Vibrio parahaemolyticus
Panida Paopradit, Natta Tansila, Komwit Surachat, Pimonsri Mittraparp-arthorn
PeerJ.2021; 9: e11567. CrossRef
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Songzhe Fu, Qingyao Wang, Yixiang Zhang, Qian Yang, Jingwei Hao, Ying Liu, Bo Pang, Michael S. Rappe
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A histone deacetylase, MoHOS2 regulates asexual development and virulence in the rice blast fungus: Jongjune Lee , Jae-Joon Lee , Junhyun Jeon; J. Microbiol. 2019;57(12):1115-1125. Published online November 22, 2019; DOI: https://doi.org/10.1007/s12275-019-9363-5

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Abstract

Histone acetylation/deacetylation represent a general and efficient epigenetic mechanism through which fungal cells control gene expression. Here we report developmental requirement of MoHOS2-mediated histone deacetylation (HDAC) for the rice blast fungus, Magnaporthe oryzae. Structural similarity and nuclear localization indicated that MoHOS2 is an ortholog of Saccharomyces cerevisiae Hos2, which is a member of class I histone deacetylases and subunit of Set3 complex. Deletion of MoHOS2 led to 25% reduction in HDAC activity, compared to the wild-type, confirming that it is a bona-fide HDAC. Lack of MoHOS2 caused decrease in radial growth and impinged dramatically on asexual sporulation. Such reduction in HDAC activity and phenotypic defects of ΔMohos2 were recapitulated by a single amino acid change in conserved motif that is known to be important for HDAC activity. Expression analysis revealed up-regulation of MoHOS2 and concomitant down-regulation of some of the key genes involved in asexual reproduction under sporulation-promoting condition. In addition, the deletion mutant exhibited defect in appressorium formation from both germ tube tip and hyphae. As a result, ΔMohos2 was not able to cause disease symptoms. Wound-inoculation showed that the mutant is compromised in its ability to grow inside host plants as well. We found that some of ROS detoxifying genes and known effector genes are de-regulated in the mutant. Taken together, our data suggest that MoHOS2-dependent histone deacetylation is pivotal for proper timing and induction of transcription of the genes that coordinate developmental changes and host infection in M. oryzae.

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Glsirt1-mediated deacetylation of GlCAT regulates intracellular ROS levels, affecting ganoderic acid biosynthesis in Ganoderma lucidum
Jing Han, Lingshuai Wang, Xin Tang, Rui Liu, Liang Shi, Jing Zhu, Mingwen Zhao
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Histone (de)acetylation in epigenetic regulation of Phytophthora pathobiology
Yufeng Guan, Joanna Gajewska, Jolanta Floryszak‐Wieczorek, Umesh Kumar Tanwar, Ewa Sobieszczuk‐Nowicka, Magdalena Arasimowicz‐Jelonek
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FolSas2 is a regulator of early effector gene expression during Fusarium oxysporum infection
Limin Song, Yalei Wang, Fahui Qiu, Xiaoxia Li, Jingtao Li, Wenxing Liang
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Regulatory roles of epigenetic modifications in plant-phytopathogen interactions
Zeng Tao, Fei Yan, Matthias Hahn, Zhonghua Ma
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The additional PRC2 subunit and Sin3 histone deacetylase complex are required for the normal distribution of H3K27me3 occupancy and transcriptional silencing in Magnaporthe oryzae
Chuyu Lin, Zhongling Wu, Huanbin Shi, Jinwei Yu, Mengting Xu, Fucheng Lin, Yanjun Kou, Zeng Tao
New Phytologist.2022; 236(2): 576. CrossRef
Regulatory Roles of Histone Modifications in Filamentous Fungal Pathogens
Yiling Lai, Lili Wang, Weilu Zheng, Sibao Wang
Journal of Fungi.2022; 8(6): 565. CrossRef
Polycomb Repressive Complex 2-Mediated H3K27 Trimethylation Is Required for Pathogenicity in Magnaporthe oryzae
Zhongling Wu, Jiehua Qiu, Huanbin Shi, Chuyu Lin, Jiangnan Yue, Zhiquan Liu, Wei Xie, Naweed I. Naqvi, Yanjun Kou, Zeng Tao
Rice Science.2022; 29(4): 363. CrossRef
Protein acetylation and deacetylation in plant‐pathogen interactions
Jing Wang, Chao Liu, Yun Chen, Youfu Zhao, Zhonghua Ma
Environmental Microbiology.2021; 23(9): 4841. CrossRef
Emerging Roles of Posttranslational Modifications in Plant-Pathogenic Fungi and Bacteria
Wende Liu, Lindsay Triplett, Xiao-Lin Chen
Annual Review of Phytopathology.2021; 59(1): 99. CrossRef
Fungal Lysine Deacetylases in Virulence, Resistance, and Production of Small Bioactive Compounds
Ingo Bauer, Stefan Graessle
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A Histone Deacetylase, Magnaporthe oryzae RPD3, Regulates Reproduction and Pathogenic Development in the Rice Blast Fungus
Song Hee Lee, Mohamed El-Agamy Farh, Jaejoon Lee, Young Taek Oh, Eunbyeol Cho, Jiyeun Park, Hokyoung Son, Junhyun Jeon, Antonio Di Pietro
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The Histone Deacetylases MoRpd3 and MoHst4 Regulate Growth, Conidiation, and Pathogenicity in the Rice Blast Fungus Magnaporthe oryzae
Chaoxiang Lin, Xue Cao, Ziwei Qu, Shulin Zhang, Naweed I. Naqvi, Yi Zhen Deng, Aaron P. Mitchell
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Histone Acetyltransferases and Deacetylases Are Required for Virulence, Conidiation, DNA Damage Repair, and Multiple Stresses Resistance of Alternaria alternata
Haijie Ma, Lei Li, Yunpeng Gai, Xiaoyan Zhang, Yanan Chen, Xiaokang Zhuo, Yingzi Cao, Chen Jiao, Fred G. Gmitter, Hongye Li
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Function of PoLAE2, a laeA homolog, in appressorium formation and cAMP signal transduction in Pyricularia oryzae
Pradabrat Prajanket, Kim-Chi Thi Vu, Jun Arai, Worawan Sornkom, Ayumi Abe, Teruo Sone
Bioscience, Biotechnology, and Biochemistry.2020; 84(11): 2401. CrossRef
A Histone Deacetylase, MoHDA1 Regulates Asexual Development and Virulence in the Rice Blast Fungus
Taehyun Kim, Song Hee Lee, Young Taek Oh, Junhyun Jeon
The Plant Pathology Journal.2020; 36(4): 314. CrossRef
Protein Acetylation/Deacetylation: A Potential Strategy for Fungal Infection Control
Junzhu Chen, Qiong Liu, Lingbing Zeng, Xiaotian Huang
Frontiers in Microbiology.2020;[Epub] CrossRef

Methyltransferase of a cell culture-adapted hepatitis E inhibits the MDA5 receptor signaling pathway: Jinjong Myoung , Jeong Yoon Lee , Kang Sang Min; J. Microbiol. 2019;57(12):1126-1131. Published online November 22, 2019; DOI: https://doi.org/10.1007/s12275-019-9478-8

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Abstract

Hepatitis E virus (HEV) is a causative agent of acute hepatitis and jaundice. The number of human infections is approximated to be over 20 million cases per year. The transmission is mainly via the fecal-oral route and contaminated water and food are considered to be a major source of infection. As a mouse model is not available, a recent development of a cell culture-adapted HEV strain (47832c) is considered as a very important tools for molecular analysis of HEV pathogenesis in cells. Previously, we demonstrated that HEV-encoded methyltransferase (MeT) encoded by the 47832c strain inhibits MDA5- and RIG-I-mediated activation of interferon β (IFN-β) promoter. Here, we report that MeT impairs the phosphorylation and activation of interferon regulatory factor 3 and the p65 subunit of NF-κB in a dose-dependent manner. In addition, the MeT encoded by the 47832c, but not that of HEV clinical or field isolates (SAR-55, Mex-14, KC-1, and ZJ-1), displays the inhibitory effect. A deeper understanding of MeTmediated suppression of IFN-β expression would provide basis of the cell culture adaptation of HEV.

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Viral Hepatitis: Host Immune Interaction, Pathogenesis and New Therapeutic Strategies
Angela Quirino, Nadia Marascio, Francesco Branda, Alessandra Ciccozzi, Chiara Romano, Chiara Locci, Ilenia Azzena, Noemi Pascale, Grazia Pavia, Giovanni Matera, Marco Casu, Daria Sanna, Marta Giovanetti, Giancarlo Ceccarelli, Pierfrancesco Alaimo di Loro,
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Hepatitis E virus: from innate sensing to adaptive immune responses
Yannick Brüggemann, Mara Klöhn, Heiner Wedemeyer, Eike Steinmann
Nature Reviews Gastroenterology & Hepatology.2024; 21(10): 710. CrossRef
Structural aspects of hepatitis E virus
Florencia Cancela, Ofelia Noceti, Juan Arbiza, Santiago Mirazo
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Host Innate Immunity Against Hepatitis Viruses and Viral Immune Evasion
Chonghui Xu, Jizheng Chen, Xinwen Chen
Frontiers in Microbiology.2021;[Epub] CrossRef
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Sameer-ul-Salam Mattoo, Jinjong Myoung
Journal of Microbiology and Biotechnology.2021; 31(12): 1601. CrossRef
Hepatitis E Virus: How It Escapes Host Innate Immunity
Sébastien Lhomme, Marion Migueres, Florence Abravanel, Olivier Marion, Nassim Kamar, Jacques Izopet
Vaccines.2020; 8(3): 422. CrossRef
Chikungunya Virus nsP2 Impairs MDA5/RIG-I-Mediated Induction of NF-κB Promoter Activation: A Potential Target for Virus-Specific Therapeutics
Sojung Bae, Jeong Yoon Lee, Jinjong Myoung
Journal of Microbiology and Biotechnology.2020; 30(12): 1801. CrossRef
Zika Virus-Encoded NS2A and NS4A Strongly Downregulate NF-κB Promoter Activity
Jeong Yoon Lee, Thi Thuy Ngan Nguyen, Jinjong Myoung
Journal of Microbiology and Biotechnology.2020; 30(11): 1651. CrossRef

Published Erratum

Erratum]Flavobacterium parvum sp. nov., isolated from soil polluted by sewer water: Hyun Seo Lee , Woon Mo Hwang , Keunsoo Kang , Tae-Young Ahn; J. Microbiol. 2019;57(12):1132-1132.; DOI: https://doi.org/10.1007/s12275-019-0720-1

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Abstract: In the article by Lee et al. published in Journal of Microbiology 2018; 56, 542–548, The KACC 19447T on 26th line of 4th paragraph in the section of ‘Description of Flavobacterium parvum sp. nov.’ on page 546 should be corrected in KACC 19448T. The sentence should have read: The type strain, HS916T (= KACC 19448T, = JCM 32368T), was isolated from soil polluted by sewer water in Cheonan, South Korea. We apologize for any inconvenience that this may have caused.

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