Journal of Microbiology

In-Kyu Kang

5 Articles

Hymenobacter jeollabukensis sp. nov., isolated from soil: Leonid N. Ten , Young Eun Han , Kyeung Il Park , In-Kyu Kang , Jeung-Sul Han , Hee-Young Jung; J. Microbiol. 2018;56(7):500-506. Published online June 28, 2018; DOI: https://doi.org/10.1007/s12275-018-8085-4

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A Gram-stain-negative, non-motile, rod-shaped, aerobic bacterial strain, designated 1-3-3-8T, was isolated from soil and characterized taxonomically using a polyphasic approach. Comparative 16S rRNA gene sequence analysis showed that strain 1-3-3-8T belongs to the family Cytophagaceae of phylum Bacteroidetes and is most closely related to Hymenobacter paludis KBP-30T (96.8% similarity), Hymenobacter ocellatus Myx2105T (96.8%), Hymenobacter coalescens WW84T (95.6%), and Hymenobacter deserti ZLB-3T (95.4%). The G + C content of the genomic DNA of strain 1-3-3-8T was 63.6 mol%. The isolate contained C15:0 iso (28.4%), summed feature 4 (C17:1 anteiso B/C17:1 iso I; 18.9%), and C15:0 anteiso (17.6%) as major fatty acids, MK-7 as the predominant respiratory quinone, and sym-homospermidine as the predominant polyamine. The major polar lipids were phosphatidylethanolamine and an unidentified lipid. The phenotypic and chemotaxonomic data supported the affiliation of strain 1-3-3-8T with the genus Hymenobacter. The DNA-DNA relatedness between strain 1-3-3-8T and H. paludis KCTC 32237T and H. ocellatus DSM 11117T were 24.5 and 27.4% respectively, clearly showing that the isolate is not related to them at the species level. Overall, the novel strain could be differentiated from its phylogenetic neighbors on the basis of several phenotypic, genotypic, and chemotaxonomic features. Therefore, strain 1-3-3-8T represents a novel species of the genus Hymenobacter, for which the name Hymenobacter jeollabukensis sp. nov. has been proposed. The type strain is 1-3-3-8T (= KCTC 52741T = JCM 32192T).

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Hymenobacter edaphi sp. nov., isolated from abandoned arsenic-contaminated farmland soil
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Spirosoma pomorum sp. nov., isolated from apple orchard soil: Weilan Li , Seung-Yeol Lee , In-Kyu Kang , Leonid N. Ten , Hee-Young Jung; J. Microbiol. 2018;56(2):90-96. Published online February 2, 2018; DOI: https://doi.org/10.1007/s12275-018-7430-y

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A Gram-negative, motile, rod-shaped, aerobic bacterial strain, designated S7-2-11T, was isolated from apple orchard soil from Gyeongsangnam-do Province, Republic of Korea, and was characterized taxonomically using a polyphasic approach. 16S rRNA gene sequence analysis indicated that strain S7-2- 11T belongs to the family Cytophagaceae in phylum Bacteroidetes, and is closely related to Spirosoma luteolum 16F6ET (94.2% identity), Spirosoma knui 15J8-12T (92.7%), and Spirosoma linguale DSM 74T (91.0%). The G + C content of the genomic DNA of strain S7-2-11T was 49.8 mol%. Strain S7-2-11T contained summed feature 3 (C16:1 ω7c/C16:1 ω6c; 35.1%), C16:1 ω5c (22.4%), C15:0 iso (13.9%), and C17:0 iso 3-OH (10.6%) as major cellular fatty acids, and MK-7 as the predominant respiratory quinone. The main polar lipids were phosphatidylethanolamine, an unidentified aminophospholipid, and two unidentified polar lipids. Phenotypic and chemotaxonomic data supported the affiliation of strain S7-2-11T with the genus Spirosoma. The results of physiological and biochemical tests showed the genotypic and phenotypic differentiation of the isolate from recognized Spirosoma species. On the basis of its phenotypic properties, genotypic distinctiveness, and chemotaxonomic features, strain S7-2-11T represents a novel species of the genus Spirosoma, for which the name Spirosoma pomorum sp. nov. is proposed. The type strain is S7-2-11T (= KCTC 52726T = JCM 32130T).

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Spirosoma telluris sp. nov. and Spirosoma arboris sp. nov. isolated from soil and tree bark, respectively
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Spirosoma utsteinense sp. nov. isolated from Antarctic ice-free soils from the Utsteinen region, East Antarctica
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Spirosoma migulaei sp. nov., isolated from soil: Joseph Okiria , Leonid N. Ten , Su-Jin Park , Seung-Yeol Lee , Dong Hoon Lee , In-Kyu Kang , Dae Sung Lee , Hee-Young Jung; J. Microbiol. 2017;55(12):927-932. Published online December 7, 2017; DOI: https://doi.org/10.1007/s12275-017-7377-4

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A Gram-stain-negative, non-motile, non-spore-forming, rodshaped, aerobic bacterium, designated 15J9-8T, was isolated from soil on Jeju Island, Republic of Korea. The isolate was able to grow between 10 and 30°C, pH 6.5–8.5, and in presence of 0–1% (w/v) NaCl. The results of comparative 16S rRNA gene sequence analysis indicated that strain 15J9-8T represented a member of the family Cytophagaceae, phylum Bacteroidetes, and was most closely related to Spirosoma aerophilum 5516J-17T (96.1% similarity), Spirosoma pulveris JSH5-14T (95.6%), and Spirosoma linguale DSM 74T (95.2%). The G + C content of the genomic DNA of the isolate was 47.0 mol%. Strain 15J9-8T contained summed feature 3 (C16:1 ω7c/C16:1 ω6c), C16:1 ω5c, and iso-C15:0 as the major fatty acids, phosphatidylethanolamine and an unidentified aminophospholipid as the main polar lipids, and menaquinone MK-7 as the predominant respiratory quinone. On the basis of its phenotypic and genotypic properties, and phylogenetic distinctiveness, strain 15J9-8T should be classified as a representative of a novel species of the genus Spirosoma, for which the name Spirosoma migulaei sp. nov. is proposed. The type strain is 15J9-8T (=KCTC 52028T =JCM 31996T).

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Fibrivirga algicola gen. nov., sp. nov., an algicidal bacterium isolated from a freshwater river
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Long Zhang, Xi-Yi Zhou, Xiao-Jing Su, Qiang Hu, Jian-Dong Jiang
Antonie van Leeuwenhoek.2019; 112(10): 1523. CrossRef
Spirosoma utsteinense sp. nov. isolated from Antarctic ice-free soils from the Utsteinen region, East Antarctica
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Spirosoma flavus sp. nov., a novel bacterium from soil of Jeju Island: Nabil Elderiny , Seung-Yeol Lee , Sangkyu Park , In-Kyu Kang , Myung Kyum Kim , Dae Sung Lee , Leonid N. Ten , Hee-Young Jung; J. Microbiol. 2017;55(11):850-855. Published online October 27, 2017; DOI: https://doi.org/10.1007/s12275-017-7360-0

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A novel, Gram-staining negative, yellow pigmented bacterial strain, designated 15J11-2T, was isolated from soil sample on Jeju Island, Republic of Korea. The strain was subjected to a taxonomic study using a polyphasic approach. The strain was able to grow at temperature range from 10°C to 30°C, pH 7–8, and in presence of 0–1% (w/v) NaCl. Comparative 16S rRNA gene sequence analysis showed that strain 15J11-2T belongs to the genus Spirosoma and levels of 16S rRNA gene sequence similarity ranged from 91.5% to 89.8%. The genomic DNA G + C content of strain 15J11-2T was 46.0 mol%. The isolate contained phosphatidylethanolamine and an unidentified aminophospholipid as the main polar lipids, menaquinone MK-7 as the predominant respiratory quinone, and summed feature 3 (C16:1 ω6c/C16:1 ω7c; 39.4%), C16:1 ω5c (27.1%), and C16:0 (13.0%) as the major fatty acids, which supported the affiliation of strain 15J11-2T to the genus Spirosoma. The results of physiological and biochemical tests allowed genotypic and phenotypic differentiation of strain 15J11-2T from recognized Spirosoma species. On the basis of its phenotypic properties, genotypic distinctiveness, chemotaxonomic features, strain 15J11-2T represents a novel species of the genus Spirosoma, for which the name Spirosoma flavus sp. nov. is proposed. The type strain is 15J11-2T (= KCTC 52026T = JCM 31998T).

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Spirosoma profusum sp. nov., and Spirosoma validum sp. nov., radiation-resistant bacteria isolated from soil in South Korea
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Hymenobacter daeguensis sp. nov. isolated from river water: Leonid N. Ten , Yeon-Hee Lee , Jae-Jin Lee , Su-Jin Park , Seung-Yeol Lee , Sangkyu Park , Dae Sung Lee , In-Kyu Kang , Hee-Young Jung; J. Microbiol. 2017;55(4):253-259. Published online January 26, 2017; DOI: https://doi.org/10.1007/s12275-017-6524-2

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A Gram-stain-negative, non-motile, non-spore-forming, rod- shaped, aerobic bacterial strain, designated 16F3Y-2T, was isolated from the Han River, South Korea, and was charac-terized taxonomically using a polyphasic approach. Compa-rative 16S rRNA gene sequence analysis showed that strain 16F3Y-2T belonged to the family Cytophagaceae in the phy-lum Bacteroidetes and was most closely related to ‘Hymeno-bacter terrae’ DG7A (98.01%), H. soli PB17T (97.26%), H. glaciei VUG-A130T (96.78%), H. antarcticus VUG-A42aaT (96.72%), H. ruber PB156T (96.61%), and H. saemangeumensis GSR0100T (95.77%). The G+C content of the genomic DNA of strain 16F3Y-2T was 62.9 mol%. The isolate contained MK-7 as the predominant respiratory quinone, and summed fea-ture 3 (C16:1 ω7c/C16:1 ω6c; 35.5%), C15:0 iso (16.9%), C16:1 ω5c (10.9%), and C15:0 anteiso (9.9%) as major fatty acids. The ma-jor polar lipid was phosphatidylethanolamine. Phenotypic and chemotaxonomic data supported the affiliation of strain 16F3Y-2T with the genus Hymenobacter. However, strain 16F3Y-2T exhibited relatively low levels of DNA-DNA related-ness with 'H. terrae' KCTC 32554 (44.1%) and H. soli KCTC 12607T (24.3%), clearly indicating that the isolate constitutes a new genospecies. Strain 16F3Y-2T could be differentiated from its phylogenetic neighbors on the basis of several phe-notypic, genotypic, and chemotaxonomic features. Therefore, strain 16F3Y-2T represents a novel species in the genus Hy-menobacter, for which the name Hymenobacter daeguensis sp. nov. is proposed. The type strain is 16F3Y-2T (=KCTC 52537T =JCM 31654T).

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Description of Hymenobacter sediminicola sp. nov., isolated from contaminated sediment
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Hymenobacter pomorum sp. nov., Isolated from Apple Orchard Soil
Leonid N. Ten, Weilan Li, Seung-Yeol Lee, In-Kyu Kang, Young-Je Cho, Myung Kyum Kim, Hee-Young Jung
Current Microbiology.2019; 76(1): 117. CrossRef
Hymenobacter jeollabukensis sp. nov., isolated from soil
Leonid N. Ten, Young Eun Han, Kyeung Il Park, In-Kyu Kang, Jeung-Sul Han, Hee-Young Jung
Journal of Microbiology.2018; 56(7): 500. CrossRef
Hymenobacter pedocola sp. nov., a novel bacterium isolated from soil
Soo-Jeong Lim, Leonid N. Ten, Byung-Oh Kim, In-Kyu Kang, Hee-Young Jung
International Journal of Systematic and Evolutionary Microbiology .2018; 68(7): 2242. CrossRef
Hymenobacter rufus sp. nov., a bacterium isolated from soil
Jeong-Eun Ohn, Leonid N. Ten, Byung-Oh Kim, Young-Je Cho, Hee-Young Jung
International Journal of Systematic and Evolutionary Microbiology.2018; 68(9): 2983. CrossRef
Description of Hymenobacter daejeonensis sp. nov., isolated from grass soil, based on multilocus sequence analysis of the 16S rRNA gene, gyrB and tuf genes
Long Jin, Xuewen Wu, So-Ra Ko, Feng-Jie Jin, Taihua Li, Chi-Yong Ahn, Hee-Mock Oh, Hyung-Gwan Lee
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Hymenobacter segetis sp. nov., isolated from soil
Leonid N. Ten, Soo Jeong Lim, Byung-Oh Kim, In-Kyu Kang, Hee-Young Jung
Archives of Microbiology.2018; 200(8): 1167. CrossRef
Hymenobacter agri sp. nov., a novel bacterium isolated from soil
Jigon Han, Leonid N. Ten, Dong Hoon Lee, In-Kyu Kang, Hee-Young Jung
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Hymenobacter terrigena sp. nov., isolated from soil
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Journal of Microbiology.2018; 56(4): 231. CrossRef
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