- Volume 68, Issue 12, 2018
Volume 68, Issue 12, 2018
- Notification List
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- New Taxa
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- Actinobacteria
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Mycobacterium syngnathidarum sp. nov., a rapidly growing mycobacterium identified in syngnathid fish
More LessTwo closely related isolates, 27335T and 24999, of rapidly growing, non-pigmented mycobacteria, were cultured from two clinically ill fish of the family Syngnathidae. Whole genome sequencing of the two isolates revealed low sequence homology to documented mycobacteria within public databases such as the NCBI. Evaluation of targeted housekeeping genes, including 16S rRNA, ITS, rpoB and hsp65, related the two bacteria distantly to Mycobacterium senegalense CK2 M4421 and Mycobacterium farcinogenes DSM 43637. Phenotypic, biochemical and dDNA–DNA hybridization tests demonstrated that Mycobacterium syngnathidarum is a new species distinct from other recognized rapidly growing mycobacterial species. Phenotypic, chemotaxonomic and phylogenetic data evaluation provided evidence that the two strains represent one novel species. We propose the formal recognition of Mycobacterium syngnathidarum sp. nov., with isolate 27335T as the type strain (=ATCC TSD-89T,=DSM 105112T).
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Actinomyces tangfeifanii sp. nov., isolated from the vulture Aegypius monachus
A novel, Gram-stain-positive, catalase-positive, non-spore-forming, short rod-shaped strain (VUL4_3T) was isolated from rectal swabs of Old World vultures (Aegypius monachus) from the Tibet–Qinghai Plateau, China. Based on the results of biochemical tests and 16S rRNA gene sequence comparison, strain VUL4_3T was determined to be a member of the genus Actinomyces that is closely related to the type strains of Actinomyces liubingyangii (97.7 % 16S rRNA gene sequence similarity) and Actinomyces marimammalium (96.5 %). Optimal growth occurred at 37 °C, pH 6–7 and with 1 % (w/v) NaCl. The typical major cellular fatty acids of strain VUL4_3T were C18 : 1ω9c, C16 : 0 and C18 : 0. The VUL4_3T genome contained 2 207 832 bp with an average G+C content of 51.9 mol%. DNA–DNA hybridization values between strain VUL4_3T and the above two species of the genus Actinomyces showed less than 32 % DNA–DNA relatedness, supporting a novel species status of strain VUL4_3T. Based on the phenotypic data and phylogenetic inference, the novel species Actinomyces tangfeifanii sp. nov. is proposed. The type strain is VUL4_3T (=CGMCC 4.7369T=DSM 103436T).
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Description of a novel species of fast growing mycobacterium: Mycobacterium kyogaense sp. nov., a scotochromogenic strain received as Mycobacterium vaccae
More LessA polyphasic study was undertaken to determine the taxonomic status of a rapidly growing, scotochromogenic organism that had been received as Mycobacterium vaccae NCTC 11659T. The organism was found to have chemotaxonomic and cultural properties in accord with its assignment to the genus Mycobacterium and was distinguished from the type strain of Mycobacterium vaccae and from other closely related reference strains on the basis of concatenated sequences of 16S rRNA, gyrB, hsp65, recA and rpoB genes. It was also distinguished from M. vaccae strain DSM 43292T and from the type strain of Mycobacterium obuense , its nearest phylogenetic neighbour, on the basis of chemotaxonomic and phenotypic data and digital DNA –DNA relatedness values of 22.7 and 68.3 %, respectively. These datasets not only indicate that strain NCTC 11659T had been misclassified as M. vaccae but that it merits recognition as representing a novel species of the genus Mycobacterium . It is proposed that the organism be classified as Mycobacteriumkyogaense sp. nov.
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A description of Mycobacterium chelonae subsp. gwanakae subsp. nov., a rapidly growing mycobacterium with a smooth colony phenotype due to glycopeptidolipids
Three rapidly growing mycobacterial strains, MOTTH4W, MOTT36WT and MOTT68W, were isolated from the sputa of three independent Korean patients co-infected with Mycobacterium yongonense Type II strains. The 16S rRNA gene sequences of all three strains were unique, which were closest to that of Mycobacterium chelonae subsp. bovis KCTC 39630T (99.9 % similarity). Multilocus sequence typing analysis targeting 10 housekeeping genes including hsp65 and rpoB revealed the distinct phylogenetic location of these strains, which were clustered with M. chelonae subsp. chelonae ATCC 35752T and M. chelonae subsp. bovis KCTC 39630T. Phylogenetic analysis based on whole genome sequences revealed a 95.89 % average nucleotide identity (ANI) value with M. chelonae subsp. chelonae , slightly higher than the 95.0 % ANI criterion for determining a novel species. In addition, phenotypic characteristics such as a smooth colony morphology and growth inhibition at 37 °C, distinct MALDI-TOF MS profiles of extracted total lipids due to surface glycopeptidolipids, and distinct drug susceptibility profiles further supported the taxonomic characterization of these strains as representing a novel subspecies of Mycobacterium chelonae . Mycobacterium chelonae subsp. gwanakae subsp. nov. is proposed and the type strain is MOTT36WT (=KCTC 29127T=JCM 32454T).
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Taxonomic status of Corynebacterium diphtheriae biovar Belfanti and proposal of Corynebacterium belfantii sp. nov
More LessClinical isolates belonging to Corynebacterium diphtheriae biovar Belfanti were characterized by genomic sequencing and biochemical and chemotaxonomic analyses. Phylogenetic analyses indicated that biovar Belfanti represents a branch that is clearly demarcated from C. diphtheriae strains of biovars Mitis and Gravis. The average nucleotide identity of isolates of biovar Belfanti with C. diphtheriae type strain NCTC 11397T (biovar Gravis) was 94.85 %. The inability to reduce nitrate differentiated biovar Belfanti from other strains of C. diphtheriae . On the basis of these results, we propose the name Corynebacterium belfantii sp. nov. for the group of strains previously considered as C. diphtheriae biovar Belfanti. The type strain of C. belfantii is FRC0043T (=CIP 111412T=DSM 105776T). Strains of C. belfantii were isolated mostly from human respiratory samples.
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Microbispora soli sp. nov., isolated from soil of a hot spring
More LessA novel actinomycete, strain RTBAU4-9T, which produced longitudinally paired spores on aerial mycelia, was isolated from a soil sample of a hot spring area. This strain exhibited chemotaxonomic and genotypic properties typical of the genus Microbispora , such as meso-diaminopimelic acid in the cell-wall peptidoglycan, glucose, ribose and trace amount of madurose as the characteristic whole-cell sugars, phosphatidylethanolamine, diphosphatidylglycerol and phosphoglycolipids as the membrane phospholipids, MK-9(H4), MK-9(H2) and MK-9(H0) as the characteristic menaquinones, and iso-C16 : 0 and anteiso-C17 : 0 as the main fatty acids. The G+C content of the genomic DNA was 70.2 mol%. The result of 16S rRNA gene sequence analysis revealed the strain was a member of the genus Microbispora and was most closely related to Microbispora hainanensis 211020T (98.3 % 16S rRNA gene sequence similarity). In addition, the low percentage of DNA–DNA relatedness (<28.1±1.2 %) and several phenotypic differences confirmed that strain RTBAU4-9T should be considered as representing a novel species of the genus Microbispora , for which the name Microbispora soli sp. nov. is proposed. The type strain is RTBAU4-9T (=TBRC 7648T=NBRC 113147T).
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Nocardioides houyundeii sp. nov., isolated from Tibetan antelope faeces
In the present study, we describe two novel Gram-stain-positive, irregular rod-shaped bacterial strains, 78T and 601, that had been isolated from the faeces of Tibetan antelopes at the Hoh Xil Nature Reserve, Qinghai–Tibet Plateau, China. The cells were aerobic, oxidase-negative and catalase-positive. When cultured on brain–heart infusion agar supplemented with 5 % sheep blood, colonies were cream in colour, circular, smooth and convex. Phylogenetic analysis based on the full-length 16S rRNA sequences revealed that type strain 78T and strain 601 belong to the genus Nocardioides, sharing the highest similarity to Nocardioides solisilvae JCM 31492T (98.3 %), Nocardioides gilvus XZ17T (97.4 %) and Nocardioides daejeonensis JCM 16922T (97.4 %). The average nucleotide identity values between the two novel strains and the three closely related type strains of the genus Nocardioides were lower than the 95–96 % threshold. The DNA G+C content of strains 78T and 601 were 71.2 and 71.3 mol% respectively. MK-8 (H4) was the predominant respiratory quinone and ll-2,6-diaminopimelic acid was the diagnostic diamino acid in its cell-wall peptidoglycan. Its polar lipids contained diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol, an unidentified phospholipid and an unidentified lipid. The main whole-cell sugars were rhamnose, xylose and galactose and the major fatty acids (>10 %) were C17 : 1ω8c, iso-C16 : 0 and C18 : 1ω9c. These data supported the affiliation of strains 78T and 601 to genus Nocardioides. Based on evidence collected from the phenotypic, genotypic and phylogenetic analyses, we propose a novel species named Nocardioides houyundeii sp. nov. The type strain is 78T (=CGMCC 4.7461T=DSM 106424T).
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Arthrobacter silvisoli sp. nov., isolated from forest soil
A novel Gram-stain-positive, strictly aerobic strain, NEAU-SA1T, which showed a rod–coccus growth life cycle, was isolated from forest soil from Zhangjiajie, Hunan Province, China. The isolate grew at 10–40 °C (optimum 28 °C), at pH 5.0–10.0 (optimum pH 7.0) and in the presence of up to 5 % (w/v) NaCl, although NaCl was not required for growth. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain NEAU-SA1T belonged to the genus Arthrobacter and was closely related to Arthrobacter cupressi DSM 24664T (98.1 % similarity). Average nucleotide identity values between NEAU-SA1T and A. cupressi DSM 24664T were 88.91 and 87.41 % by ANIm and ANIb analysis, respectively. The in silico DNA–DNA hybridization value between strain NEAU-SA1T and A. cupressi DSM 24664T was 34.20 %, again indicating they belong to different taxa. The genomic DNA G+C content was 66.74 mol%. The major cellular fatty acids (>10 %) were anteiso-C15 : 0, anteiso-C17 : 0 and iso-C16 : 0. The polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol and two unidentified glycolipids. The predominant menaquinone was MK-9(H2). The peptidoglycan type was A3α with an interpeptide bridge comprising l-Lys and l-Ala. Glucose, ribose and galactose were the whole-cell sugars. On the basis of morphological, physiological, biochemical and chemotaxonomic analysis, strain NEAU-SA1T was classified as representing a novel species in the genus Arthrobacter , for which the name Arthrobacter silvisoli sp. nov. is proposed. The type strain is NEAU-SA1T (=DSM 106716T=CCTCC AB 2017271T).
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Microbacterium halophytorum sp. nov., a novel endophytic actinobacterium isolated from halophytes
Two actinobacterial strains, YJYP 303T and YZYP 518, were isolated from two species of halophytes collected from the southern edge of the Gurbantunggut Desert. Cells were Gram-stain-positive, aerobic, short rods and without flagella. Growth of the two strains was found to occur at 4–44 °C, pH 6.0–12.0 and in the presence of up to 15 % (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequences indicated that the two strains are associated with members of the genus Microbacterium . In the phylogenetic tree, the two strains shared a clade with Microbacterium halotolerans YIM 70130T (97.58 % 16S rRNA gene sequence identity) and Microbacterium populi KCTC 29152T (96.54 %). The average nucleotide identity values of strain YJYP 303T and YZYP 518 to M. halotolerans YIM 70130T were determined to be 79.97 and 80.03 %, respectively. The genomic DNA G+C contents of strains YJYP 303T and YZYP 518 were 69.72 and 70.57 %, respectively. The major fatty acids were anteiso-C15 : 0, anteiso-C17 : 0 and iso-C16 : 0. The predominant respiratory quinones was MK-11, followed by MK-10 and MK-12. The muramic acid type of peptidoglycan was N-glycolyl. The whole-cell sugars were mannose, ribose, rhamnose, glucose, galactose and two unidentified sugars. The cell-wall amino acids were glutamic acid, ornithine, glycine and alanine. The polar lipids were diphosphatidylglycerol, phosphatidylglycerol, an unidentified phospholipid and an unidentified glycolipid. On the basis of the evidence presented in this study, strains YJYP 303T and YZYP 518 are characterized as members of a novel species in the genus Microbacterium , for which the name Microbacterium halophytorum sp. nov. is proposed. The type strain is YJYP 303T (=CGMCC 1.16264T=KCTC 49100T).
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- Archaea
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Halococcus salsus sp. nov., a novel halophilic archaeon isolated from rock salt
More LessTwo pink-pigmented halophilic archaea, designated strains ZJ1T and J81, were isolated from rock salt of Yunnan Salt Mine, China, and commercial salt imported from Bolivia, respectively. Cells were non-motile, coccoid, approximately 0.8–1.6 µm in diameter, stained Gram-negative and often occurred in pairs. Colonies were wet, opaque and smooth-edged. Strain ZJ1T grew optimally with 20 % (w/v) NaCl, at pH 7.5 and at 38–40 °C, which was the same as for strain J81. 16S rRNA gene sequence similarity between strains ZJ1T and J81 was 99.7 %. Sequence similarity searches based on the 16S rRNA gene and cell morphology suggested that strains ZJ1T and J81 belong to the genus Halococcus in the family Halococcaceae . The major polar lipids of the type strain, ZJ1T, were phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester and sulfated diglycosyl-diether-1. The profile of polar lipids, cell shape, motility and lack of lysis of cells in distilled water show that strains ZJ1T and J81 were similar to other members of the genus Halococcus . Strain ZJ1T shared the highest 16S rRNA gene and rpoB′ gene sequence similarities of 99.0 and 95.3 % with Halococcus hamelinensis 100A6T, respectively, followed by less than 94.6 % with sequences of other species in the genus Halococcus . DNA–DNA relatedness between strains ZJ1T and J81 was 90.1±0.7 %, while 27±0.5 % was found between strain ZJ1T and H. hamelinensis JCM 12892T (=100A6T), and 29.0±0.5 % between strains J81 and H. hamelinensis JCM 12892T. The DNA G+C content of strain ZJ1T was 66.5 mol% (T m). The stable phylogenetic position, differential physiological and biochemical properties and extensive sequence divergence suggest that strains ZJ1T and J81 represent a novel species, for which the name Halococcus salsus sp. nov. is proposed. The type strain is ZJ1T (=CGMCC 1.16025T=NBRC 112867T).
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- Bacteroidetes
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Pedobacter chitinilyticus sp. nov., a chitin-degrading bacterium isolated from wheat leaf tissue
A bacterium, designated strain CM134L-2T, was isolated from a chitin-enriched wheat leaf microbiome in Chengdu, Sichuan province, China. It was Gram-stain-negative, strictly aerobic, non-spore-forming, motile, rod-shaped, and bright yellow in colour. Strain CM134L-2T grew at 4–35 °C, at pH 6.0–9.0 and could use chitin as the only carbon resource. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain CM134L-2T was most closely related to Pedobacter nanyangensis Q-4T (97.7 %) and Pedobacter zeaxanthinifaciens TDMA-5T (97.4 %). Digital DNA–DNA hybridization (dDDH) values between strain CM134L-2T with these two type strains were 26.8 and 20.8 %, respectively, and average nucleotide identity (ANI) values were 83.2 and 76.2 %; these values are lower than the proposed and generally accepted species boundaries of 70 % for dDDH and 95–96 % for ANI, which suggests strain CM134L-2T represents a novel species. The genomic DNA G+C content of strain CM134L-2T was 39.3 mol%, menaquinone-7 was the major respiratory quinone, phosphatidylethanolamine was the major polar lipid and the major components of the cellular fatty acids were iso-C15 : 0, and C16 : 1ω7c/C16 : 1ω6c (summed feature 3); these features supported the affiliation of strain CM134L-2T to the genus Pedobacter . Overall, strain CM134L-2T belongs to the genus Pedobacter , but can be classified as a novel species, for which the name Pedobacter chitinilyticus sp. nov. is proposed. The type strain is CM134L-2T (=CGMCC 1.16520T=KCTC 62643T).
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Zobellella endophytica sp. nov., isolated from the roots of Phragmites communis in the Kumtag Desert
More LessA Gram-negative, aerobic, non-spore-forming, rod-shaped, motile bacterium, named strain 59N8T, was isolated from Phragmites communis roots in the Kumtag Desert. Phylogenetic analysis based on the 16S rRNA gene sequence showed that the isolate belongs to the genus Zobellella within the family Aeromonadaceae . The analysis showed that strain 59N8T was most closely related to Zobellella taiwanensis ZT1T. The average nucleotide identity value with Zobellella taiwanensis ZT1T was 88.2 %, and the digital DNA–DNA hybridization value was 29.7±2.4 %, which was calculated using the Genome-to-Genome Distance Calculator. The G+C content of strain 59N8T was 62.8 mol%. Strain 59N8T grew at 0–5 % (w/v) NaCl (optimum, 0–4 %), pH 6.0–9.0 (optimum, 7.0–8.0) and at 10–45 °C. The major cellular fatty acids were summed feature 8 (C18 : 1ω7c/C18 : 1ω6c), summed feature 3 (C16 : 1ω7c/C16 : 1ω6c) and C16 : 0. The major polar lipids in strain 59N8T were phosphatidylethanolamine and phosphatidylglycerol. Based on the chemotaxonomic, phylogenetic and phenotypic data, strain 59N8T represents a novel species in the genus Zobellella , for which the name Zobellella endophytica sp. nov. is proposed. The type strain is 59N8T (=ACCC 60074T=KCTC 62456T).
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Prevotella rara sp. nov., isolated from human faeces
A strain of obligately anaerobic, Gram-stain-negative rods was isolated from human faeces and characterized both phenotypically and genotypically. Phylogenetic analysis based on 16S rRNA gene and whole-genome sequences revealed the strain to represent a member of the genus Prevotella , distant from the species with validly published names, with the closest relationship to Prevotella oryzae . The strain was moderately saccharolytic and proteolytic. The predominant menaquinones were MK-13 and MK-12. The major cellular long-chain fatty acids were anteiso-C15 : 0 and iso-C15 : 0. The genomic DNA G+C content was 45.7 mol%. On the basis of chemotaxonomic and genotypic properties, it was concluded that the strain represent a novel species within the genus Prevotella , for which the name Prevotella rara sp. nov. is proposed. The type strain of Prevotella rara is 109T (=VKM B-2992T=DSM 105141T).
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Flavobacterium riviphilum sp. nov., isolated from a freshwater creek
More LessA novel bacterium, designated strain TAPY6T, was isolated from a freshwater creek in Taiwan. The strain was Gram-stain-negative, strictly aerobic, motile-by-gliding, rod-shaped and formed translucent yellow colonies. Optimal growth occurred at 20–30 °C, pH 6 and in the absence of NaCl. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain TAPY6T belonged to the genus Flavobacterium and was most closely related to Flavobacterium succinicans LMG 10402T (97.3 % sequence similarity) and Flavobacterium glycines Gm-149T (96.3 %). Strain TAPY6T contained C15 : 0 and iso-C15 : 0 as the predominant fatty acids. The polar lipid profile consisted of phosphatidylethanolamine, five uncharacterized aminophospholipids, two uncharacterized phospholipids and one uncharacterized aminolipid. The major polyamine was homospermidine. The major isoprenoid quinone was MK-6. The DNA G+C content of the genomic DNA was 39.8 mol%. Phenotypic characteristics of the novel strain also differed from those of the closest related species of the genus Flavobacterium . On the basis of the genotypic, chemotaxonomic and phenotypic data, strain TAPY6T represents a novel species in the genus Flavobacterium , for which the name Flavobacterium riviphilum sp. nov. is proposed. The type strain is TAPY6T (=BCRC 81007T=LMG 29728T=KCTC 52444T).
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Flavobacterium magnum sp. nov., Flavobacterium pallidum sp. nov., Flavobacterium crocinum sp. nov. and Flavobacterium album sp. nov
More LessFour new limnic bacterial strains, namely HYN0048T, HYN0049T, HYN0056T and HYN0059T, were isolated from two lakes in the Nakdong River water system in Korea. 16S rRNA gene sequence analyses indicated that strains HYN0048T, HYN0049T, HYN0056T and HYN0059T belonged to the genus Flavobacterium by showing the highest sequence similarities with the type strains of F. soli (94.9 %), F. keumense (95.1 %), F. dispersum (97.7 %) and F. hauense (97.6 %), respectively. The low sequence similarities and tree topologies implied the novelty of the four isolates, as novel genomic species of the genus Flavobacterium . Numerous physiological and biochemical features also supported the distinctiveness of the isolates from previously known bacterial species. On the basis of the phylogenetic and phenotypic data presented in this study, four novel species are suggested with the following names: Flavobacterium magnum sp. nov. (type strain HYN0048T=KACC 19180T=NBRC 112740T), Flavobacterium pallidum sp. nov. (HYN0049T=KACC 19181T=NBRC 112741T), Flavobacterium crocinum sp. nov. (HYN0056T=KACC 19182T=NBRC 112743T) and Flavobacterium album sp. nov. (HYN0059T=KACC 19183T=NBRC 112744T).
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Flavobacterium sediminis sp. nov., a starch-degrading bacterium isolated from tidal flat sediment
More LessA yellow-pigmented bacterium with the ability to degrade starch, designated MEBiC07310T, was isolated from tidal flat sediment collected in Taean County, Republic of Korea. Phylogenetic analysis based on the 16S rRNA gene sequence indicated that strain MEBiC07310T was affiliated with the genus Flavobacterium in the phylum Bacteroidetes and showed that the strain was most closely related to Flavobacterium haoranii LQY-7T (96.8 % similarity), followed by Flavobacterium indicum GPTSA 100-9T (95.2 %) and Flavobacterium urocaniciphilum YIT 12746T (94.6 %). Genome-based analysis of the average nucleotide identity (ANI) and in silico DNA–DNA hybridization (DDH) of strain MEBiC07310T compared with F. haoranii LQY-7T and F. indicum GPTSA 100-9T yielded ANI values of 77.0 and 73.3 % and DDH values of 18.0±2.7 and 16.1±3.6 %, respectively. The DNA G+C content of strain MEBiC07310T was 35.2 mol%. Cells of the strain were aerobic, Gram-stain-negative and rod-shaped, and negative for flexirubin-type pigments. Growth was observed at 17–43 °C (optimum 32 °C), at pH 5.0–8.0 (optimum pH 7.0) and with 0–3 % (w/v) NaCl (optimum 1 %). The major fatty acids (>10 %) of strain MEBiC07310T were iso-C15 : 0, iso-C17 : 0 3-OH, summed feature 1 (iso-C15 : 1 H and/or C13 : 0 3-OH) and summed feature 3 (C16 : 1ω6c and/or C16 : 1ω7c). The major respiratory quinone was menaquinone MK-6. Based on its phenotypic and genotypic characteristics, strain MEBiC07310T should be classified as representing a novel species of the genus Flavobacterium , for which the name Flavobacterium sediminis sp. nov. is proposed. The type strain is MEBiC07310T (=KCTC 62132T=JCM 32291T).
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- Firmicutes and Related Organisms
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Kyrpidia spormannii sp. nov., a thermophilic, hydrogen-oxidizing, facultative autotroph, isolated from hydrothermal systems at São Miguel Island, and emended description of the genus Kyrpidia
A Gram-stain-positive, rod-shaped, non-motile, spore-forming bacterium, strain EA-1T, was isolated from hydrothermal sediment samples from the Azores (São Miguel, Portugal). 16S rRNA gene sequence analysis of the isolated bacterium revealed a phylogenetic affiliation with the genus Kyrpidia . The sequence similarity of the five 16S rRNA gene copies to its closest relative, Kyrpidia tusciae , ranged from 97.79 to 97.85 %. The in silico estimate of DNA–DNA hybridization was 56.0 %. The dominant fatty acids of the novel isolate were anteiso-C17 : 0 (49.9 %), iso-C17 : 0 (23.0 %) and iso-C16 : 0 (13.3 %), while the quinone detected was menaquinone MK-7. Analysis of polar lipids identified phosphatidylglycerol, diphosphatidylglycerol, phosphatidylethanolamine and additional unidentified compounds comprising two glycolipids, two phospholipids and two lipids. The presence of meso-diaminopimelic acid in the peptidoglycan and mannose, arabinose and ribose in the cell wall of strain EA-1T were detected. The strain was able to grow heterotrophically as well as autotrophically with carbon dioxide as the sole carbon source and with hydrogen and oxygen as electron donor and acceptor, respectively. Based on its chemotaxonomic, physiological and genomic characteristics, the new strain is considered to represent a novel species within the genus Kyrpidia , for which the name Kyrpidia spormannii sp. nov. is proposed. The type strain is strain EA-1T (=DSM 106492T=CCOS1194T).
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Reclassification of Eubacterium hallii as Anaerobutyricum hallii gen. nov., comb. nov., and description of Anaerobutyricum soehngenii sp. nov., a butyrate and propionate-producing bacterium from infant faeces
A bacterial strain designated L2-7T, phylogenetically related to Eubacterium hallii DSM 3353T, was previously isolated from infant faeces. The complete genome of strain L2-7T contains eight copies of the 16S rRNA gene with only 98.0–98.5 % similarity to the 16S rRNA gene of the previously described type strain E. hallii . The next closest validly described species is Anaerostipes hadrus DSM 3319T (90.7 % 16S rRNA gene similarity). A polyphasic taxonomic approach showed strain L2-7T to be a novel species, related to type strain E. hallii DSM 3353T. The experimentally observed DNA–DNA hybridization value between strain L2-7T and E. hallii DSM 3353T was 26.25 %, close to that calculated from the genomes (34.3 %). The G+C content of the chromosomal DNA of strain L2-7T was 38.6 mol%. The major fatty acids were C16 : 0, C16 : 1 cis9 and a component with summed feature 10 (C18 : 1c11/t9/t6c). Strain L2-7T had higher amounts of C16 : 0 (30.6 %) compared to E. hallii DSM 3353T (19.5 %) and its membrane contained phosphatidylglycerol and phosphatidylethanolamine, which were not detected in E. hallii DSM 3353T. Furthermore, 16S rRNA gene phylogenetic analysis advocates that E. hallii DSM 3353T is misclassified, and its reclassification as a member of the family Lachnospiraceae is necessary. Using a polyphasic approach, we propose that E. hallii (=DSM 3353T=ATCC 27751T) be reclassified as the type strain of a novel genus Anaerobutyricum sp. nov., comb. nov. and we propose that strain L2-7T should be classified as a novel species, Anaerobutyricum soehngenii sp. nov. The type strain is L2-7T (=DSM 17630T=KCTC 15707T).
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Jeotgalibacillus proteolyticus sp. nov., a protease-producing bacterium isolated from ocean sediments
A Gram-stain-positive, rod-shaped bacterial strain, 22-7T, was isolated from ocean sediment of Laizhou Bay, China, and was characterized by using a polyphasic approach. Optimal growth was observed at 33 °C on a 2216E agar plate of pH 7.5 and with 2 % (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequences identified it as a member of the genus Jeotgalibacillus , most similar to Jeotgalibacillus campisalis SF-57T (98.7 % similarity), Jeotgalibacillus marinus DSM 1297T (98.2 %) and Jeotgalibacillus soli P9T (97.1 %). Average nucleotide identity values and digital DNA–DNA hybridization values were less than 74.2 and 18.1 %, respectively, between strain 22-7T and the type strains of closely related species. The major polar lipids were aminophospholipid, phosphatidylethanolamine, phosphatidylglycerol and diphosphatidylglycerol; the major fatty acids (>10 %) were anteiso-C15 : 0 and iso-C15 : 0; and the major menaquinone was MK-7. The peptidoglycan type of the cell wall was A1α linked through l-lysine as the diamino acid. Combined data from phenotypic, chemotaxonomic and genotypic characterizations demonstrated that strain 22-7T represents a novel Jeotgalibacillus species, for which the name Jeotgalibacillus proteolyticus sp. nov. is proposed. The type strain is 22-7T(=MCCC 1H00228T=KCTC 33930T).
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Volumes and issues
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Volume 74 (2024)
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Volume 32 (1982)
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Volume 31 (1981)
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Volume 30 (1980)
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Volume 29 (1979)
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Volume 28 (1978)
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Volume 27 (1977)
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Volume 26 (1976)
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Volume 25 (1975)
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Volume 24 (1974)
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Volume 23 (1973)
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Volume 22 (1972)
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Volume 21 (1971)
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Volume 20 (1970)
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Volume 19 (1969)
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Volume 18 (1968)
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Volume 17 (1967)
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Volume 16 (1966)
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Volume 15 (1965)
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Volume 14 (1964)
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Volume 13 (1963)
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Volume 12 (1962)
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Volume 11 (1961)
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Volume 10 (1960)
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Volume 9 (1959)
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Volume 8 (1958)
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Volume 7 (1957)
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Volume 6 (1956)
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Volume 5 (1955)
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Volume 4 (1954)
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Volume 3 (1953)
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Volume 2 (1952)
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Volume 1 (1951)