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Flavobacterium humi sp. nov., a flexirubin-type pigment producing bacterium, isolated from soil
김인협,Jiyoun Kim,Geeta Chhetri,Taegun Seo 한국미생물학회 2019 The journal of microbiology Vol.57 No.12
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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김인협,Wan-Taek Im,Kiseong Joh,김명겸,Jung-Hoon Yoon,Won Yong Kim,서태건 국립생물자원관 2023 Journal of species research Vol.12 No.3
We isolated and identified 25 unrecorded bacterial species belonging to the phylum Actinomycetota found in the Republic of Korea. Sequence comparison of 16S rRNA was performed using the NCBI BLAST and EzBioCloud database to identify 25 species, which had a 16S rRNA gene sequence similarity of >98.8% and were allocated as unrecorded species in the Republic of Korea. Among the 25 unrecorded bacterial strains, Streptomyces was the most common with nine species, followed by Leifsonia with two species. Isoptericola, Nocardioides, Dermacoccus, Sinomonas, Patulibacter, Marmoricola, Allobranchiibius, Aldersonia, Actinokineospora, Agromyces, Aeromicrobium, Cellulomonas, and Gordonia with one species each were also found. Twenty-five unrecorded species were excavated in various environments, such as tidal flats, ferns, soil, pine cones, moss, mud, wetlands, and plants. These isolates were characterized on the basis of their phylogenetic, biochemical properties, and morphological data, and species descriptions were provided.
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지하 침전물에서 분리한 Tianweitania sediminis에 대한 유전체 서열
채트리 기타,김인협,김지연,강민정,소윤섭,서태근 한국미생물학회 2021 미생물학회지 Vol.57 No.3
Here, we report the first draft genome sequence of the member of the genus Tianweitania, which was isolated from sediment core in north-east China. The whole-genome sequence was analyzed in this study using Illumina Hiseq platform. The genome comprises 22 contigs with genome size of 4,704,309 bp long. The G + C content was 61.8%. The draft genome contains 4,476 protein-coding genes, 57 pseudogenes and 60 RNA genes including 6 ribosomal RNA genes, 50 transfer RNA (tRNA) genes and 4 non-coding RNA (ncRNA) genes. Siderophore biosynthesis genes and tryptophan biosynthesis genes were identified. These indicates that Tianweitania sediminis Z8T possesses potential plant growth-promoting activity. 이 연구에서 중국 북동부 지하 침전물에서 분리된 Tianweitania sediminis Z8T 균주를 Illumina Hiseq 플랫폼을 사용하여 전장 유전체를 분석하여 다음과 같은 결과를 얻었다. Z8T 균주의 염 기서열은 4,704,309 bp로 이루어져 있으며 22개의 contig로 구 성되어 있다. 유전체의 G + C 함량은 61.8%이다. 유전체에는 4,476개의 단백질 암호화 유전자, 57개의 위유전자, 60개의 RNA 유전자가 있다. 60개의 RNA 유전자 중 6개는 rRNA 유 전자, 50개는 tRNA 유전자, 4개는 ncRNA 유전자로 예상할 수 있었다. 그리고 siderophore 생합성 유전자와 트립토판 생합성 유전자가 있음을 확인하였는데, 이 결과로부터 Tianweitania sediminis Z8T 균주가 식물 성장 촉진하는 잠재적 활성을 가질 수 있을 것으로 예상할 수 있다.
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