Journal of Microbiology

Journal Articles

Genomic Characterization and Comparative Analysis of Streptococcus zhangguiae sp. nov. Isolated from the Respiratory Tract of Marmota Himalayana: Caixin Yang, Jiajia Ma, Huimin Zhou, Jing Yang, Ji Pu, Shan Lu, Dong Jin, Liyun Liu, Kui Dong, Jianguo Xu; J. Microbiol. 2024;62(11):951-963. Published online November 4, 2024; DOI: https://doi.org/10.1007/s12275-024-00177-2

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Abstract: Two Gram-stain-positive, oxidase-negative, non-motile, facultative anaerobic, α-hemolytic, coccus-shaped bacteria (zg-86^T and zg-70) were isolated from the respiratory tracts of marmots (Marmota Himalayana) on the Qinghai-Tibet Plateau of China. Phylogenetic analysis of the 16S rRNA gene and 545 core genes revealed that these two strains belong to the Streptococcus genus. These strains were most closely related to Streptococcus respiraculi HTS25^T, Streptococcus cuniculi CCUG 65085^T, and Streptococcus marmotae HTS5^T. The average nucleotide identity (ANI) and digital DNA‒DNA hybridization (dDDH) were below the threshold for species delineation. The predominant cellular fatty acids (CFAs) in this novel species were C_16:0, C_18:0, and C_18:1ω9c, whereas the primary polar lipids were phosphatidylglycerol (PG), phosphatidylethanolamine (PE) and an unknown phosphoglycolipid (PGL). The optimal growth conditions for the strains were 37 °C, pH 7.0, and 0.5% (w/v) NaCl on brain-heart infusion (BHI) agar supplemented with 5% defibrinated sheep blood. Comparative genomics analyses revealed the potential pathogenicity of strain zg-86^T through comparisons with suis subclade strains in terms of virulence factors, pathogen-host interactions (PHIs) and mobile genetic factors (MGEs). Based on the phenotypic characteristics and phylogenetic analyses, we propose that these two isolates represent novel species in the genus Streptococcus, for which the names Streptococcus zhangguiae sp. nov. (the type strain zg-86^T=GDMCC 1.1758^T=JCM 34273^T) is proposed.

Saxibacter everestensis gen. nov., sp. nov., A Novel Member of the Family Brevibacteriaceae, Isolated from the North Slope of Mount Everest: Mao Tian, Shiyu Wu, Wei Zhang, Gaosen Zhang, Xue Yu, Yujie Wu, Puchao Jia, Binglin Zhang, Tuo Chen, Guangxiu Liu; J. Microbiol. 2024;62(4):277-284. Published online March 6, 2024; DOI: https://doi.org/10.1007/s12275-024-00108-1

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Abstract: We isolated and analyzed a novel, Gram-stain-positive, aerobic, rod-shaped, non-motile actinobacterium, designated as strain ZFBP1038(T), from rock sampled on the north slope of Mount Everest. The growth requirements of this strain were 10-37 °C, pH 4-10, and 0-6% (w/v) NaCl. The sole respiratory quinone was MK-9, and the major fatty acids were anteiso-C(15:0) and iso-C(17:0). Peptidoglycan containing meso-diaminopimelic acid, ribose, and glucose were the major cell wall sugars, while polar lipids included diphosphatidyl glycerol, phosphatidyl glycerol, an unidentified phospholipid, and an unidentified glycolipid. A phylogenetic analysis based on 16S rRNA gene sequences showed that strain ZFBP1038(T) has the highest similarity with Spelaeicoccus albus DSM 26341( T) (96.02%). ZFBP1038(T) formed a distinct monophyletic clade within the family Brevibacteriaceae and was distantly related to the genus Spelaeicoccus. The G + C content of strain ZFBP1038(T) was 63.65 mol% and the genome size was 4.05 Mb. Digital DNA-DNA hybridization, average nucleotide identity, and average amino acid identity values between the genomes of strain ZFBP1038(T) and representative reference strains were 19.3-25.2, 68.0-71.0, and 52.8-60.1%, respectively. Phylogenetic, phenotypic, and chemotaxonomic characteristics as well as comparative genome analyses suggested that strain ZFBP1038(T) represents a novel species of a new genus, for which the name Saxibacter gen. nov., sp. nov. was assigned with the type strain Saxibacter everestensis ZFBP1038(T) (= EE 014( T) = GDMCC 1.3024( T) = JCM 35335( T)).

Structural and Functional Analyses of the Flavoprotein Disulfide Reductase FN0820 of Fusobacterium nucleatum: Hyunwoo Shin , Yeongjin Baek , Dukwon Lee , Yongbin Xu , Yonghoon Kwon , Inseong Jo , Nam-Chul Ha; J. Microbiol. 2023;61(12):1033-1041. Published online December 20, 2023; DOI: https://doi.org/10.1007/s12275-023-00095-9

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Abstract

Escherichia coli RclA and Staphylococcus aureus MerA are part of the Group I flavoprotein disulfide reductase (FDR) family and have been implicated in the contribution to bacterial pathogenesis by defending against the host immune response. Fusobacterium nucleatum is a pathogenic, anaerobic Gram-negative bacterial species commonly found in the human oral cavity and gastrointestinal tract. In this study, we discovered that the F. nucleatum protein FN0820, belonging to the Group I FDR family, exhibited a higher activity of a Cu2+- dependent NADH oxidase than E. coli RclA. Moreover, FN0820 decreased the dissolved oxygen level in the solution with higher NADH oxidase activity. We found that L-tryptophan and its analog 5-hydroxytryptophan inhibit the FN0820 activities of NADH oxidase and the concomitant reduction of oxygen. Our results have implications for developing new treatment strategies against pathogens that defend the host immune response with Group I FDRs.

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The role of metals in hypothiocyanite resistance in Escherichia coli
Michael J. Gray, Laurie E. Comstock
Journal of Bacteriology.2024;[Epub] CrossRef

Regulation of iron homeostasis by peroxide-sensitive CatR, a Fur-family regulator in Streptomyces coelicolor: Yeonbum Kim , Jung-Hye Roe , Joo-Hong Park , Yong-Joon Cho , Kang-Lok Lee; J. Microbiol. 2021;59(12):1083-1091. Published online December 4, 2021; DOI: https://doi.org/10.1007/s12275-021-1457-1

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Abstract

CatR, a peroxide-sensing transcriptional repressor of Fur family, can de-repress the transcription of the catA gene encoding catalase upon peroxide stress in Streptomyces coelicolor. Since CatR-regulated genes other than catA and its own gene catR have not been identified in detail, the understanding of the role of CatR regulon is very limited. In this study, we performed transcriptomic analysis to identify genes influenced by both 􀈟􀂊atR mutation and hydrogen peroxide treatment. Through ChIP-qPCR and other analyses, a new consensus sequence was found in CatR-responsive promoter region of catR gene and catA operon for direct regulation. In addition, vtlA (SCO2027) and SCO4983 were identified as new members of the CatR regulon. Expression levels of iron uptake genes were reduced by hydrogen peroxide and a DmdR1 binding sequence was identified in promoters of these genes. The increase in free iron by hydrogen peroxide was thought to suppress the iron import system by DmdR1. A putative exporter protein VtlA regulated by CatR appeared to reduce intracellular iron to prevent oxidative stress. The name vtlA (VIT1-like transporter) was proposed for iron homeostasis related gene SCO2027.

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Mingxuan Wang, Honglin Li
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Yanchao Gu, Yongde Liu, Wei Mao, Ying Peng, Xiaoru Han, Han Jin, Jingling Xu, Liyang Chang, Yixin Hou, Xihui Shen, Xingyu Liu, Yantao Yang, G. Marcela Rodriguez
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Si-Min Fan, Ze-Qi Li, Shi-Zhe Zhang, Liang-Yu Chen, Xi-Ying Wei, Jian Liang, Xin-Qing Zhao, Chun Su, Xiao-Hua Zhang
mSystems.2023;[Epub] CrossRef
The regulatory role of Fur-encoding SCLAV_3199 in iron homeostasis in Streptomyces clavuligerus
Büşra Abanoz-Seçgin, Çiğdem Otur, Sezer Okay, Aslıhan Kurt-Kızıldoğan
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Review

Raloxifene as a treatment option for viral infections: Subin Hong , JuOae Chang , Kwiwan Jeong , Wonsik Lee; J. Microbiol. 2021;59(2):124-131. Published online February 1, 2021; DOI: https://doi.org/10.1007/s12275-021-0617-7

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Abstract

Severe acute respiratory syndrome coronavirus 2 (SARSCoV- 2) has caused corona virus disease 2019 (COVID-19) pandemic and led to mass casualty. Even though much effort has been put into development of vaccine and treatment
methods
to combat COVID-19, no safe and efficient cure has been discovered. Drug repurposing or drug repositioning which is a process of investigating pre-existing drug candidates for novel applications outside their original medical indication can speed up the drug development process. Raloxifene is a selective estrogen receptor modulator (SERM) that has been approved by FDA in 1997 for treatment and prevention of postmenopausal osteoporosis and cancer. Recently, raloxifene demonstrates efficacy in treating viral infections by Ebola, influenza A, and hepatitis C viruses and shows potential for drug repurposing for the treatment of SARS-CoV-2 infection. This review will provide an overview of raloxifene’s mechanism of action as a SERM and present proposed mechanisms of action in treatment of viral infections.

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Journal Articles

Parahaliea maris sp. nov., isolated from surface seawater and emended description of the genus Parahaliea: Yang Liu , Juan Du , Jun Zhang , Qiliang Lai , Zongze Shao , Honghui Zhu; J. Microbiol. 2020;58(2):92-98. Published online January 29, 2020; DOI: https://doi.org/10.1007/s12275-020-9405-z

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Abstract

A Gram-stain-negative, strictly aerobic, short-rod-shaped, and non-motile bacterial strain designated HSLHS9T was isolated from surface seawater collected from the South China Sea. Strain HSLHS9T could grow at 15–41°C (optimum 28°C), at pH 5.0–9.0 (optimum 6.0–7.0), and in 0–7% (w/v) NaCl (optimum 2–3%). Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain HSLHS9T shared high identities with the closely related Parahaliea aestuarii S2-26T (98.6%) and Parahaliea mediterranea 7SM29T (97.8%) and formed a distinct lineage within the genus Parahaliea. Wholegenome sequencing of strain HSLHS9T revealed the size of 4.8 Mbp and DNA G + C content of 61.8 mol%. Strain HSLHS9T shared the digital DNA-DNA hybridization values of 22.4% and 23.0%, and the average nucleotide identities of 79.7% and 79.9%, respectively, with the two type strains above. The predominant cellular fatty acids of the strain were summed feature 8 (C18:1 ω6c and/or C18:1 ω7c), summed feature 3 (C16:1 ω7c and/or C16:1 ω6c), C17:1 ω8c, and C16:0. The sole isoprenoid quinone was identified as Q-8. The polar lipids were phosphatidylglycerol, diphosphatidylglycerol, phosphatidylethanolamine, aminolipid, and two glycolipids. Based on taxonomic data obtained in this study, it is suggested that strain HSLHS9T represents a novel species of the genus Parahaliea, for which the name Parahaliea maris sp. nov. is proposed. The type strain is HSLHS9T (= MCCC 1A06717T = KCTC 52307T). An emended description of the genus Parahaliea is also provided.

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A comparative analysis of the microbial communities and functional genes of the nitrogen cycling in mangroves of China, Indian and Malaysia
Zhihui Qian, Yuyang Li, Amit Pratush, Jie Kan, Ji-Dong Gu, Tao Peng, Tongwang Huang, Zhong Hu
International Biodeterioration & Biodegradation.2024; 190: 105767. CrossRef
Phylogenomic evaluation of Mangrovimicrobium sediminis gen. nov. sp. nov., the first nitrogen fixing member of the family Halieaceae adapted to mangrove habitat and reclassification of Halioglobus pacificus to Pseudohaliglobus pacificus comb. nov.
Pravin Kumar, Ashish Verma, Pooja Yadav, Joyasree Das, Lalit Kumar, Srinivasan Krishnamurthi
Science of The Total Environment.2024; 933: 172995. CrossRef
Abundant and rare bacteria in anthropogenic estuary: Community co-occurrence and assembly patterns
Ziyue Shi, Lili Ma, Yingying Wang, Jie Liu
Ecological Indicators.2023; 146: 109820. CrossRef
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Wentao Zhu, Juan Zhou, Shan Lu, Jing Yang, Xin-He Lai, Dong Jin, Ji Pu, Yuyuan Huang, Liyun Liu, Zhenjun Li, Jianguo Xu
Journal of Microbiology.2022; 60(2): 137. CrossRef
Sediminihaliea albiluteola gen. nov., sp. nov., a new member of the family Halieaceae, isolated from marine sediment
Shan Jiang, Feng-Bai Lian, You-Yang Sun, Xiao-Kui Zhang, Zong-Jun Du
International Journal of Systematic and Evolutionary Microbiology .2021;[Epub] CrossRef
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Brevibacillus antibioticus sp. nov., with a broad range of antibacterial activity, isolated from soil in the Nakdong River: Ahyoung Choi , Young Ho Nam , Kiwoon Baek , Eu Jin Chung; J. Microbiol. 2019;57(11):991-996. Published online October 28, 2019; DOI: https://doi.org/10.1007/s12275-019-9325-y

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Abstract

A Gram-stain-positive, aerobic, motile, and rod-shaped bacterial strain designated TGS2-1T was isolated from sediment soil in the Nakdong River, Republic of Korea. The optimal growth of strain TGS2-1T was observed at 28°C and pH 7.0 without NaCl supplementation. Strain TGS2-1T revealed antibiosis against various bacteria, including Staphylococcus aureus KCCM 4051, CCARM 3089 (methicillin resistant strains), Enterococcus faecalis KCCM 11814, Escherichia coli KCTC 2443, Candida albicans KACC 7270, and Filobasidium neoformans KCTC 7902. Phylogenetic analyses based on the 16S rRNA gene sequences indicated that strain TGS2-1T belonged to the genus Brevibacillus and shared 93.8–99.7% sequence similarity with Brevibacillus species. Whole-genome sequencing of strain TGS2-1T revealed a genome size of 6.2 Mbp and DNA G + C content of 47.0 mol%. The TGS2-1T genome shared an average nucleotide identity and digital DNA-DNA hybridization of 74.6–93.3% and 18.6–67.1%, respectively, with six related Brevibacillus genomes. The major fatty acid constituents of strain TGS2-1T were anteiso-C15:0 (62.3%) and anteiso-C17:0 (10.8%). Cells of strain TGS2-1T contained diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, seven unidentified aminophospholipids, and five unidentified lipids. The isoprenoid quinone detected in the strain was menaquinone-7 (MK-7). Based on data obtained from this polyphasic taxonomic study, strain TGS2-1T represents a novel species belonging to genus Brevibacillus, for which the name B. antibioticus sp. nov. is proposed. The type strain is TGS2-1T (= KCCM 90326T = NBRC 113840T = FBCC-B2501).

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Traditional processing increases biological activities of Dendrobium offificinale Kimura et. Migo in Southeast Yunnan, China
Di Zhou, Ying Zhao, Zhilin Chen, Xiuxiang Yan, Yanqiang Zhao, Lu Gao, Lixin Yang
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Paenibacillus nuruki sp. nov., isolated from Nuruk, a Korean fermentation starter: Soo-Jin Kim , Hayoung Cho , Jae-Hyung Ahn , Hang-Yeon Weon , Jae-Ho Joa , Jeong-Seon Kim , Soon-Wo Kwon; J. Microbiol. 2019;57(10):836-841. Published online June 27, 2019; DOI: https://doi.org/10.1007/s12275-019-9118-3

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Abstract

A Gram-stain-positive, rod-shaped, non-endospore-forming, motile by means of peritrichous flagella, facultatively anaerobic bacterium designated TI45-13arT was isolated from Nuruk, a Korean traditional Makgeolli fermentation starter. It grew at 4–35°C (optimum, 28–30°C), pH 5.0–9.0 (optimum, pH 7.0) and NaCl concentrations up to 5% (w/v). Phylogenetic trees generated using 16S rRNA gene sequences revealed that strain TI45-13arT belonged to the genus Paenibacillus and showed the highest sequence similarities with Paenibacillus kyungheensis DCY88T (98.5%), Paenibacillus hordei RH-N24T (98.4%) and Paenibacillus nicotianae YIM h-19T (98.1%). The major fatty acid was anteiso-C15:0. The DNA G+C content was 39.0 mol%, and MK-7 was the predominant isoprenoid quinone. The polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, three unidentified glycolipids, and one unidentified aminoglycolipid. The cell-wall peptidoglycan contained meso-diaminopimelic acid. On the basis of polyphasic taxonomy study, it was suggested that strain TI45-13arT represents a novel species within the genus Paenibacillus for which the name Paenibacillus nuruki sp. nov. is proposed. The type strain was TI45-13arT (= KACC 18728T = NBRC 112013T).

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Fulvimarina endophytica sp. nov., a novel endophytic bacterium isolated from bark of Sonneratia caseolaris: Li Tuo , Xiao-Rui Yan; J. Microbiol. 2019;57(8):655-660. Published online June 11, 2019; DOI: https://doi.org/10.1007/s12275-019-8627-4

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A Gram-negative, aerobic, short-rod-shaped, motile (with a terminal flagellum), non-spore-forming bacterium, designated strain 85T, was isolated from a surface-sterilized bark of Sonneratia caseolaris collected from Qinzhou in Guangxi, China and was analyzed using a polyphasic approach to determine its taxonomic position. Strain 85T grew optimally in the presence of 1–2% (w/v) NaCl at 30°C and pH 6.0–7.0. Phylogenetic analysis based on 16S rRNA gene sequence suggested that strain 85T belonged to the genus Fulvimarina and shared the highest 16S rRNA gene sequence similarity with Fulvimarina pelagi HTCC2506T (96.16%). The cell-wall peptidoglycan contained meso-diaminopimelic acid and ubiquinone Q-10 was the predominant respiratory lipoquinone. The polar lipids comprised diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine, an unidentified amino lipid, three unidentified phospholipids and six unidentified lipids. The major fatty acid was C18:1 ω7c. The DNA G+C content of strain 85T was 65.4 mol%, and the average nucleotide identity and estimated DDH values between strain 85T and the type strain of Fulvimarina pelagi HTCC2506T were 77.3% and 21.7%, respectively. Based on the phylogenetic, phenotypic, and chemotaxonomic analyses, strain 85T should be considered as a novel species of the genus Fulvimarina with the proposed name Fulvimarina endophytica sp. nov., and its type strain is 85T (= KCTC 62717T = CGMCC 1.13665T).

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Arthrobacter dokdonellae sp. nov., isolated from a plant of the genus Campanula: Hyeon-Woo Koh , Myung-Suk Kang , Ki-Eun Lee , Eun-Young Lee , Hongik Kim , Soo-Je Park; J. Microbiol. 2019;57(9):732-737. Published online May 11, 2019; DOI: https://doi.org/10.1007/s12275-019-8540-x

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A Gram-stain-positive, oxidase- and catalase-positive, motile, aerobic, and rod-shaped bacterial strain, designated as DCT-5T, was isolated from a native plant belonging to the genus Campanula at Dokdo island, Republic of Korea. Growth of the strain DCT-5T was observed at 15–37°C (optimum 30°C) on R2A broth, pH 6.0–8.0 (optimum 7.0), and 0–5% (w/v) NaCl concentration (optimum 0%). The 16S rRNA gene sequence analysis revealed that strain DCT-5T was most closely related to Arthrobacter silviterrae KIS14-16T, Arthrobacter livingstonensis LI2T, Arthrobacter stackebrandtii CCM 2783T, Arthrobacter cryoconiti Cr6-08T, Arthrobacter ramosus CCM 1646T, and Arthrobacter psychrochitiniphilus GP3T with pairwise sequence similarities of 98.76%, 97.47%, 97.25%, 97.11%, 97.11%, and 97.00%, respectively. The DNA G+C content of strain DCT-5T was 64.7 mol%, and its DNA–DNA relatedness values with A. silviterrae KIS14-16T, A. livingstonensis LI2T, A. stackebrandtii CCM 2783T, A. psychrochitiniphilus GP3T, A. ramosus CCM 1646T, and A. cryoconiti Cr6-08T were 32.57 ± 2.02%, 28.75 ± 0.88%, 31.93 ± 1.15%, 34.73 ± 1.86%, 29.12 ± 1.56%, and 27.23 ± 0.88%, respectively. The major quinone was MK-9(H2) and major fatty acids were anteiso-C15:0, anteiso-C17:0, iso-C15:0, and iso-C16:0. The polar lipids were diphosphatidylglycerol (DPG), phosphatidylglycerol (PG), phosphatidylinositol (PI), unidentified glycolipid (GL), two unidentified aminophospholipids (APLs), and three unidentified lipids (Ls). The peptidoglycan type was A3α. On the basis of phenotypic, phylogenetic, genotypic, and chemotaxonomic characteristics, strain DCT-5T represents a novel species of the genus Arthrobacter, for which the name Arthrobacter dokdonellae sp. nov. is proposed. The type strain is DCT-5T (= KCTC 49189T = LMG 31284T).

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Edaphovirga cremea gen. nov., sp. nov., isolated from the rhizospheric soil of Codonopsis clematidea: Jin-Yan Xue , Meng-Yue Zhang , Yu Zhang , Juan Cheng , Li-Cheng Liu , Ying-Ying Wu , Tian-Yuan Zhang , Yi-Xuan Zhang; J. Microbiol. 2019;57(5):337-342. Published online February 26, 2019; DOI: https://doi.org/10.1007/s12275-019-8408-0

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Abstract

A Gram-negative, facultatively anaerobic, non-motile, nonspore- forming, coccoid or rod-shaped and creamy-pigmented bacterium, designated SYP-B2100T, was isolated from the rhizospheric soil of Codonopsis clematidea in the Xinjiang Uygur Autonomous Region, China. The optimal growth occurred at 28°C, pH 5.0, in the absence of NaCl. The cells tested positive in catalase and methyl red tests but negative in oxidase, urease, gelatinase, milk coagulation, and peptonisation, H2S production, nitrate reduction, and Voges-Proskauer tests. The major isoprenoid quinone was ubiquinone-8 (Q-8). The major cellular fatty acids were C16:0 and summed feature 8. The polar lipids consisted of diphosphatidylglycerol, phosphatidylethanolamine, and phosphatidylglycerol. The 16S rRNA gene sequence of strain SYP-B2100T was the most similar to that of Rahnella inusitata DSM 30078T (96.9%) within the family Enterobacteriaceae. The genomic DNA G+C content of strain SYP-B2100T was 50.3 mol%. The combined data from the phylogenetic, morphological, physiological, biochemical, and chemotaxonomic analyses presented in this study support the conclusion that strain SYP-B2100T represents a novel species of a new genus, for which the name Edaphovirga cremea gen. nov., sp. nov. is proposed; the type strain is SYPB2100T (= CGMCC 1.5857T = DSM 105170T = KCTC 62024T).

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Chryseolinea soli sp. nov., isolated from soil: Shin Ae Lee , Yiseul Kim , Mee-Kyung Sang , Jaekyeong Song , Soon-Wo Kwon , Hang-Yeon Weon; J. Microbiol. 2019;57(2):122-126. Published online January 31, 2019; DOI: https://doi.org/10.1007/s12275-019-8562-4

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Abstract

A yellow-colored bacterium with gliding motility, strain KIS68-18T, was isolated from a soil sample at Bijin Island in Tongyeong city, Republic of Korea. The cells were strictly aerobic, Gram-staining-negative, non-spore-forming, and rod-shaped. The strain grew at the range of 10–35°C (optimum, 25–30°C), pH 5.5–8.0 (optimum, 6.0–7.5), and 0–0.5% (w/v) NaCl. A phylogenetic analysis based on 16S rRNA gene sequences revealed that strain KIS68-18T was closely related to Chryseolinea serpens DSM 24574T (98.9%) and had low sequence similarities (below 92.6%) with other members of the family ‘Cytophagaceae’ in the phylum Bacteroidetes. The major respiratory quinone system was MK-7 and the predominant cellular fatty acids were C16:1 ω5c (38.8%), iso-C15:0 (18.5%), and summed feature 3 (C16:1 ω7c and/or C16:1 ω6c, 10.6%). The polar lipids consisted of phosphatidylethanolamine, one unidentified phospholipid, three unidentified aminophospholipids, two unidentified aminolipids, and five unidentified lipids. The DNA G + C content was 50.9%. Based on the phylogenetic, physiological, and chemotaxonomic data, stain KIS68-18T represents a novel species of the genus Chryseolinea, for which the name Chryseolinea soli sp. nov. is proposed. The type strain of Chryseolinea soli is KIS68-18T (= KACC 17327T = NBRC 113100T).

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Paraburkholderia dokdonella sp. nov., isolated from a plant from the genus Campanula: Man-Young Jung , Myung-Suk Kang , Ki-Eun Lee , Eun-Young Lee , Soo-Je Park; J. Microbiol. 2019;57(2):107-112. Published online November 19, 2018; DOI: https://doi.org/10.1007/s12275-019-8500-5

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Abstract

The novel Gram-stain-negative, rod-shaped, aerobic bacterial strain DCR-13T was isolated from a native plant belonging to the genus Campanula on Dokdo, an island in the Republic of Korea. Comparative analysis of the 16S rRNA gene sequence indicated that this strain is closely related to Paraburkholderia peleae PP52-1T (98.43% 16S rRNA gene sequence similarity), Paraburkholderia oxyphila NBRC 105797T (98.42%), Paraburkholderia sacchari IPT 101T (98.28%), Paraburkholderia mimosarum NBRC 106338T (97.80%), Paraburkholderia denitrificans KIS30-44T (97.46%), and Paraburkholderia paradise WAT (97.45%). This analysis of the 16S rRNA gene sequence also suggested that DCR-13T and the six closely related strains formed a clade within the genus Paraburkholderia, but that DCR-13T was clearly separated from the established species. DCR-13T had ubiquinone 8 as its predominant respiratory quinone, and its genomic DNA G + C content was 63.9 mol%. The isolated strain grew at a pH of 6.0–8.0 (with an optimal pH of 6.5), 0–4% w/v NaCl (with an optimal level of 0%), and a temperature of 18–42°C (with an optimal temperature of 30°C). The predominant fatty acids were C16:0, summed feature 8 (C18:1 ω7c/C18:1 ω6c), C17:0 cyclo, C19:0 cyclo ω8c, summed feature 3 (C16:1 ω6c/C16:1 ω7c) and summed feature 2 (C12:0 aldehyde), and the major polar lipids were phosphatidylglycerol and phosphatidylethanolamine. On the basis of polyphasic evidence, it is proposed that strain DCR-13T (= KCTC 62811T = LMG 30889T) represents the type strain of a novel species, Paraburkholderia dokdonella sp. nov.

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Flavisolibacter aluminii sp. nov., a novel member of the genus Flavisolibacter isolated from an automotive air conditioning system: Hyosun Lee , Dong-Uk Kim , Suyeon Lee , Song-Gun Kim , A-Young Park , Jae-Hyung Ahn , Jong-Ok Ka; J. Microbiol. 2019;57(1):18-22. Published online November 19, 2018; DOI: https://doi.org/10.1007/s12275-019-8219-3

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Abstract

A Gram-stain-negative, aerobic, non-motile, rod-shaped, and yellow-pigmented bacterium, designated strain ID1709T, was isolated from an automotive air conditioning system collected in Korea. Analysis of 16S rRNA gene sequence similarity showed that strain ID1709T had 92.2–94.3% similarities with the type strains of members of the genus Flavisolibacter. The major cellular fatty acids were iso-C15:0, iso-C15:1 G, iso-C17:0 3-OH, and summed feature 3 (C16:1 ω7c and/or C16:1 ω6c). The predominant respiratory quinone was MK-7. The polar lipids comprised phosphatidylethanolamine, aminoglycophospholipid, two unidentified aminolipids, and three unidentified lipids. The DNA G + C content of the strain was 35.6 mol%. Based on phenotypic, chemotaxonomic, and genotypic data, strain ID1709T represents a novel species in the genus Flavisolibacter, for which the name Flavisolibacter aluminii sp. nov. (= KACC 19451T = KCTC 52778T = NBRC 112870T), is proposed.

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Hongyang Ren, Shuangli Chen, Jiajian Shang, Yujia Gao, Yuanpeng Deng, Zhaoyang Wang, Guojun Hu, Bing Wang
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Metallococcus carri gen. nov., sp. nov., a novel member of the family Dermacoccaceae isolated from an automotive air conditioning system
Jong Sung Lim, Hyosun Lee, Jigwan Son, Song-Gun Kim, Dong-Uk Kim, Jong-Ok Ka
Archives of Microbiology.2021; 203(7): 4073. CrossRef

Paenibacillus seodonensis sp. nov., isolated from a plant of the genus Campanula: Myung-Suk Kang , Ki-Eun Lee , Eun-Young Lee , Soo-Je Park; J. Microbiol. 2018;56(12):874-879. Published online October 25, 2018; DOI: https://doi.org/10.1007/s12275-018-8455-y

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Abstract

Strain DCT-19T, representing a Gram-stain-positive, rodshaped, aerobic bacterium, was isolated from a native plant belonging to the genus Campanula on Dokdo, the Republic of Korea. Comparative analysis of the 16S rRNA gene sequence showed that this strain was closely related to Paenibacillus amylolyticus NRRL NRS-290T (98.6%, 16S rRNA gene sequence similarity), Paenibacillus tundrae A10bT (98.1%), and Paenibacillus xylanexedens NRRL B-51090T (97.6%). DNADNA hybridization indicated that this strain had relatively low levels of DNA-DNA relatedness with P. amylolyticus NRRL NRS-290T (30.0%), P. xylanexedens NRRL B-51090T (29.0%), and P. tundrae A10bT (24.5%). Additionally, the genomic DNA G + C content of DCT-19T was 44.8%. The isolated strain grew at pH 6.0–8.0 (optimum, pH 7.0), 0–4% (w/v) NaCl (optimum, 0%), and a temperature of 15–45°C (optimum 25–30°C). The sole respiratory quinone in the strain was menaquinone-7, and the predominant fatty acids were C15:0 anteiso, C16:0 iso, and C16:0. In addition, the major polar lipids were diphosphatidylglycerol and phosphatidylethanolamine. Based on its phenotypic properties, genotypic distinctiveness, and chemotaxonomic features, strain DCT-19T is proposed as a novel species in the genus Paenibacillus, for which the name Paenibacillus seodonensis sp. nov. is proposed (=KCTC 43009T =LMG 30888T). The type strain of Paenibacillus seodonensis is DCT-19T.

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