scholarly journals Description of Anaerobaculum hydrogeniformans sp. nov., an anaerobe that produces hydrogen from glucose, and emended description of the genus Anaerobaculum

2012 ◽  
Vol 62 (Pt_4) ◽  
pp. 832-838 ◽  
Author(s):  
Matthew W. Maune ◽  
Ralph S. Tanner

A novel anaerobic, moderately thermophilic, NaCl-requiring fermentative bacterium, strain OS1T, was isolated from oil production water collected from Alaska, USA. Cells were Gram-negative, non-motile, non-spore-forming rods (1.7–2.7 × 0.4–0.5 µm). The G+C content of the genomic DNA of strain OS1T was 46.6 mol%. The optimum temperature, pH and NaCl concentration for growth of strain OS1T were 55 °C, pH 7 and 10 g l−1, respectively. The bacterium fermented d-fructose, d-glucose, maltose, d-mannose, α-ketoglutarate, l-glutamate, malonate, pyruvate, l-tartrate, l-asparagine, Casamino acids, l-cysteine, l-histidine, l-leucine, l-phenylalanine, l-serine, l-threonine, l-valine, inositol, inulin, tryptone and yeast extract. When grown on d-glucose, 3.86 mol hydrogen and 1.4 mol acetate were produced per mol substrate. Thiosulfate, sulfur and l-cystine were reduced to sulfide, and crotonate was reduced to butyrate with glucose as the electron donor. 16S rRNA gene sequence analysis indicated that strain OS1T was related to Anaerobaculum thermoterrenum (99.7 % similarity to the type strain), a member of the phylum Synergistetes . DNA–DNA hybridization between strain OS1T and A. thermoterrenum DSM 13490T yielded 68 % relatedness. Unlike A. thermoterrenum , strain OS1T fermented malonate, maltose, tryptone, l-leucine and l-phenylalanine, but not citrate, fumarate, lactate, l-malate, glycerol, pectin or starch. The major cellular fatty acid of strain OS1T was iso-C15 : 0 (91 % of the total). Strain OS1T also contained iso-C13 : 0 3-OH (3 %), which was absent from A. thermoterrenum , and iso-C13 : 0 (2 %), which was absent from Anaerobaculum mobile . On the basis of these results, strain OS1T represents a novel species of the genus Anaerobaculum , for which the name Anaerobaculum hydrogeniformans sp. nov. is proposed. The type strain is OS1T ( = DSM 22491T  = ATCC BAA-1850T). An emended description of the genus Anaerobaculum is also given.

Author(s):  
Juan Du ◽  
Yang Liu ◽  
Tao Pei ◽  
Ming-Rong Deng ◽  
Honghui Zhu

A novel Gram-stain-negative, aerobic and rod-shaped bacterial strain designated as 6D45AT was isolated from mangrove soil and characterized using a polyphasic taxonomic approach. Strain 6D45AT was found to grow at 10–37 °C (optimum, 28 °C), at pH 6.0–9.0 (optimum, 7.0) and in 0–5 % (w/v) NaCl (optimum, 2%). Phylogenetic analysis based on 16S rRNA gene sequences showed that strain 6D45AT fell into the genus Salipiger and shared 99.1 % identity with the closest type strain Salipiger pacificus CGMCC 1.3455T and less than 97.2 % identity with other type strains of this genus. The 34.8 % digital DNA–DNA hybridization (dDDH) and 88.3 % average nucleotide identity (ANI) values between strain 6D45AT and the closest relative above were well below recognized thresholds of 70 % DDH and 95–96 % ANI for species definition, implying that strain 6D45AT should represent a novel genospecies. The phylogenomic analysis indicated that strain 6D45AT formed an independent branch distinct from reference strains. The predominant cellular fatty acid of strain 6D45AT was summed feature 8 (C18 : 1  ω6c and/or C18 : 1  ω7c, 66.9 %); the polar lipids were diphosphatidylglycerol, phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol, two unidentified aminolipids, two unidentified glycolipids and an unknown lipid; the respiratory quinone was Q-10. The genomic DNA G+C content was 66.5 mol %. Based on the phenotypic and genotypic characteristics, strain 6D45AT is concluded to represent a novel species of the genus Salipiger , for which the name Salipiger mangrovisoli sp. nov., is proposed. The type strain of the species is 6D45AT (=GDMCC 1.1960T=KCTC 82334T). We also propose the reclassification of Paraphaeobacter pallidus as Salipiger pallidus comb. nov. and ‘ Pelagibaca abyssi ’ as a species of the genus Salipiger .


Author(s):  
Xue-Gong Li ◽  
Jin Lin ◽  
Shi-Jie Bai ◽  
Jie Dai ◽  
Ze-Xi Jiao ◽  
...  

A novel moderately thermophilic, anaerobic, heterotrophic bacterium (strain SY095T) was isolated from a hydrothermal vent chimney located on the Southwest Indian Ridge at a depth of 2730 m. Cells were Gram-stain-positive, motile, straight to slightly curved rods forming terminal endospores. SY095T was grown at 45–60 °C (optimum 50–55 °C), pH 6.0–7.5 (optimum 7.0), and in a salinity of 1–4.5 % (w/v) NaCl (optimum 2.5 %). Substrates utilized by SY095T included fructose, glucose, maltose, N-acetyl glucosamine and tryptone. Casamino acid and amino acids (glutamate, glutamine, lysine, methionine, serine and histidine) were also utilized. The main end products from glucose fermentation were acetate, H2 and CO2. Elemental sulphur, sulphate, thiosulphate, sulphite, fumarate, nitrate, nitrite and Fe(III) were not used as terminal electron acceptors. The predominant cellular fatty acids were C14 : 0 (60.5%) and C16 : 0 (7.6 %). The main polar lipids consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, five unidentified phospholipids and two unidentified aminophospholipids. No respiratory quinones were detected. The chromosomal DNA G+C content was 30.8 mol%. The results of phylogenetic analysis of the 16S rRNA gene sequences indicated that SY095T was closely related to Crassaminicella profunda Ra1766HT (95.8 % 16S rRNA gene sequence identity). SY095T exhibited 78.1 % average nucleotide identity (ANI) to C. profunda Ra1766HT. The in silico DNA–DNA hybridization (DDH) value indicated that SY095T shared 22.7 % DNA relatedness with C. profunda Ra1766HT. On the basis of its phenotypic, genotypic and phylogenetic characteristics, SY095T is suggested to represent a novel species of the genus Crassaminicella , for which the name Crassaminicella thermophila sp. nov. is proposed. The type strain is SY095T (=JCM 34213=MCCC 1K04191). An emended description of the genus Crassaminicella is also proposed.


2012 ◽  
Vol 62 (Pt_11) ◽  
pp. 2717-2723 ◽  
Author(s):  
Yuki Inahashi ◽  
Atsuko Matsumoto ◽  
Satoshi Ōmura ◽  
Yōko Takahashi

An actinomycete strain, designated K09-0627T, was isolated from the roots of an orchid collected in Okinawa Prefecture, Japan. Two actinomycete strains K11-0047T and K11-0057T were isolated from the roots of Rumex acetosa and Houttuynia cordata collected in Kanagawa Prefecture, Japan. 16S rRNA gene sequence analyses indicated that the isolates belonged to the genus Phytohabitans, and that they were closely related to each other and to Phytohabitans suffuscus K07-0523T. The DNA–DNA relatedness values between the three isolates and Phytohabitans suffuscus were below 70 %. On the basis of phylogenetic analysis, DNA–DNA relatedness values and phenotypic characteristics, the strains should be classified as novel species in the genus Phytohabitans , for which the names Phytohabitans flavus sp. nov. (type strain, K09-0627T = JCM 17387T = NBRC 107702T = DSM 45551T), Phytohabitans rumicis sp. nov. (type strain, K11-0047T = JCM 17829T = NBRC 108638T = BCC 48146T) and Phytohabitans houttuyneae sp. nov. (type strain, K11-0057T = JCM 17830T = NBRC 108639T = BCC 48147T) are proposed.


2012 ◽  
Vol 62 (Pt_8) ◽  
pp. 1825-1831 ◽  
Author(s):  
Young-Ok Kim ◽  
Sooyeon Park ◽  
Bo-Hye Nam ◽  
So-Jung Kang ◽  
Young-Baek Hur ◽  
...  

A Gram-negative, non-motile and coccoid, ovoid or rod-shaped bacterial strain, designated MA1-1T, was isolated from a sea squirt (Halocynthia roretzi) collected from the South Sea, Korea. Phylogenetic analyses based on 16S rRNA gene sequences revealed that strain MA1-1T is phylogenetically closely related to Litoreibacter species and to Thalassobacter arenae . It exhibited 16S rRNA gene sequence similarities of 97.3, 97.1 and 97.3 % to the type strains of Litoreibacter albidus , Litoreibacter janthinus and T. arenae , respectively. Strain MA1-1T contained Q-10 as the predominant ubiquinone and C18 : 1ω7c as the predominant fatty acid. The polar lipid profile of strain MA1-1T was similar to those of the type strains of L. albidus and L. janthinus . T. arenae was found to be phylogenetically and chemotaxonomically more closely related to Litoreibacter species and strain MA1-1T than to Thalassobacter stenotrophicus , the type species of the genus Thalassobacter . The DNA G+C content of strain MA1-1T was 57.9 mol%, and DNA–DNA relatedness to the type strains of the two Litoreibacter species and T. arenae was 9–14 %. Differential phenotypic properties, together with the observed phylogenetic and genetic distinctiveness, distinguished strain MA1-1T from the two Litoreibacter species and T. arenae . On the basis of the data presented, strain MA1-1T is considered to represent a novel species of the genus Litoreibacter , for which the name Litoreibacter meonggei sp. nov. is proposed. The type strain is MA1-1T ( = KCTC 23699T  = CCUG 61486T). In this study, it is also proposed that Thalassobacter arenae is reclassified as a member of the genus Litoreibacter , Litoreibacter arenae comb. nov. (type strain GA2-M15T  = DSM 19593T  = KACC 12675T). An emended description of the genus Litoreibacter is also presented.


2014 ◽  
Vol 64 (Pt_10) ◽  
pp. 3526-3531 ◽  
Author(s):  
Fabien Aujoulat ◽  
Philippe Bouvet ◽  
Estelle Jumas-Bilak ◽  
Hélène Jean-Pierre ◽  
Hélène Marchandin

Ten isolates of unknown, Gram-stain-negative, anaerobic cocci were recovered from human clinical samples, mainly from semen. On the basis of their phenotypic features, including morphology, main metabolic end products, gas production, nitrate reduction and decarboxylation of succinate, the strains were identified as members of the genus Veillonella. Multi-locus sequence analysis and corresponding phylogenies were based on 16S rRNA, dnaK and rpoB genes, and on the newly proposed gltA gene. The strains shared high levels of genetic sequence similarity and were related most closely to Veillonella ratti . The strains could not be differentiated from V. ratti on the basis of 16S rRNA gene sequence analysis while gltA, rpoB and dnaK gene sequences showed 85.1, 93.5 and 90.2 % similarity with those of the type strain of V. ratti , respectively. Phylogenetic analyses revealed that the isolates formed a robust clade in the V. ratti – Veillonella criceti – Veillonella magna subgroup of the genus Veillonella . As observed for V. criceti , the isolates were able to ferment fructose. In contrast to other members of the genus Veillonella , the 10 strains were not able to metabolize lactate. Cellular fatty acid composition was consistent with that of other species of the genus Veillonella . From these data, the 10 isolates are considered to belong to a novel species in the genus Veillonella , for which the name Veillonella seminalis sp. nov. is proposed. The type strain is ADV 4313.2T ( = CIP 107810T = LMG 28162T). Veillonella strain ACS-216-V-Col6b subjected to whole genome sequencing as part as the Human Microbiome Project is another representative of V. seminalis sp. nov. An emended description of the genus Veillonella is also proposed.


2012 ◽  
Vol 62 (Pt_4) ◽  
pp. 839-843 ◽  
Author(s):  
Jung-Hoon Yoon ◽  
So-Jung Kang ◽  
Soo-Young Lee ◽  
Yong-Taek Jung ◽  
Jung-Sook Lee ◽  
...  

A Gram-stain-negative, non-motile, non-spore-forming, aerobic, rod-shaped bacterial strain, designated DPG-28T, was isolated from seawater on the southern coast of Korea. Strain DPG-28T grew optimally at 30 °C and in the presence of 2 % (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain DPG-28T formed a coherent cluster with members of the genera Marivita and Gaetbulicola , with which it exhibited sequence similarity values of 97.8–98.5 %. The DNA G+C content of strain DPG-28T was 65.1 mol%. The predominant ubiquinone of strain DPG-28T was ubiquinone-10 (Q-10), consistent with data for the genera Marivita and Gaetbulicola . The cellular fatty acid profiles of strain DPG-28T and the type strains of Marivita cryptomonadis , Marivita litorea and Gaetbulicola byunsanensis were essentially similar in that the common predominant fatty acid was C18 : 1ω7c. Major polar lipids found in strain DPG-28T and the type strains of M. cryptomonadis , M. litorea and G. byunsanensis were phosphatidylcholine, phosphatidylglycerol, phosphatidylethanolamine and an unidentified aminolipid. From these data, it is proposed that Gaetbulicola byunsanensis be reclassified as a member of the genus Marivita , for which the name Marivita byunsanensis comb. nov. is proposed, with the type strain SMK-114T ( = CCUG 57612T  = KCTC 22632T), and that strain DPG-28T be classified in the genus Marivita . Differential phenotypic properties and genetic distinctiveness of strain DPG-28T demonstrated that this strain is distinguishable from M. cryptomonadis , M. litorea and G. byunsanensis . On the basis of the data presented, strain DPG-28T is considered to represent a novel species of the genus Marivita , for which the name Marivita hallyeonensis sp. nov. is proposed. The type strain is DPG-28T ( = KCTC 23421T  = CCUG 60522T). An emended description of the genus Marivita is also provided.


2014 ◽  
Vol 64 (Pt_4) ◽  
pp. 1290-1295 ◽  
Author(s):  
Riitta Rahkila ◽  
Katrien De Bruyne ◽  
Per Johansson ◽  
Peter Vandamme ◽  
Johanna Björkroth

In the present study we investigated the taxonomic status of 20 lactic acid bacteria (LAB) originating from packaged meat. On the basis of 16S rRNA gene sequence similarity, these strains were shown to belong to the genus Leuconostoc with Leuconostoc gelidum , Leuconostoc inhae and Leuconostoc gasicomitatum as the closest phylogenetic relatives. The novel strains shared more than 70 % DNA–DNA relatedness with type and reference strains of both L. gelidum and L. gasicomitatum . The DNA–DNA relatedness values between L. gelidum type and reference strains and L. gasicomitatum type and reference strains were also above 70 %, showing that all these strains belonged to the same species. Sequence analyses of concatenated atpA, pheS, and rpoA genes demonstrated that the novel strains as well as type and reference strains of L. gelidum and L. gasicomitatum are phylogenetically closely related, but form three clearly separated subgroups. Numerical analysis of HindIII ribopatterns and phenotypic tests supported this subdivision. Based on the data presented in this study, we propose to reclassify Leuconostoc gasicomitatum as Leuconostoc gelidum subsp. gasicomitatum comb. nov. (type strain, LMG 18811T = DSM 15947T). The novel strains isolated in the present study represent a novel subspecies, for which the name Leuconostoc gelidum subsp. aenigmaticum subsp. nov. is proposed, with POUF4dT ( = LMG 27840T = DSM 19375T) as the type strain. The proposal of these two novel subspecies automatically creates the subspecies Leuconostoc gelidum subsp. gelidum subsp. nov. (type strain, NCFB 2775T = DSM 5578T). An emended description of Leuconostoc gelidum is also provided.


2014 ◽  
Vol 64 (Pt_4) ◽  
pp. 1223-1228 ◽  
Author(s):  
Yunhui Zhang ◽  
Kaihao Tang ◽  
Xiaochong Shi ◽  
Xiao-Hua Zhang

A Gram-staining-negative, aerobic, rod-shaped bacterium, designated strain T202T, was isolated from the gill of a cultured flounder (Paralichthys olivaceus). Based on 16S rRNA gene sequence similarity, strain T202T was a member of the family Colwelliaceae and shared 93.32–96.58 % similarity with type strains of all members of the most closely related genus Thalassomonas . Phylogenetically, the isolate shared a root with the type strains of four marine species, Thalassomonas agariperforans M-M1T, Thalassomonas agarivorans TMA1T, Thalassomonas loyana CBMAI 722T and Thalassomonas ganghwensis JC2041T. Optimal growth occurred in the presence of 2–4 % (w/v) NaCl, at pH 7.0–8.0 and at 28 °C. Ubiquinone 8 (Q-8) was the predominant respiratory quinone. The major fatty acids were C16 : 0, summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c), C16 : 1ω9c and C17 : 1ω8c. The major polar lipids were phosphatidylethanolamine and phosphatidylglycerol. The DNA G+C content of strain T202T was 37 mol%. On the basis of polyphasic analysis, especially the phylogenetic relationships and the lower DNA G+C content, strain T202T is considered to represent a novel species in a new genus, for which the name Thalassotalea piscium gen. nov., sp. nov. is proposed. The type strain of Thalassotalea piscium is T202T ( = JCM 18590T = DSM 26287T = KCTC 32144T). Because Thalassomonas agariperforans M-M1T, Thalassomonas agarivorans TMA1T, Thalassomonas loyana CBMAI 722T and Thalassomonas ganghwensis JC2041T formed a phylogenetic group together with strain T202T that was clearly separated from other known strains of Thalassomonas , these four species are reclassified as members of the genus Thalassotalea as Thalassotalea agariperforans comb. nov. (type strain M-M1T = KCTC 23343T = CCUG 60020T), Thalassotalea agarivorans comb. nov. (type strain TMA1T = BCRC 17492T = JCM 13379T = DSM 19706T), Thalassotalea loyana comb. nov. (type strain CBMAI 722T = LMG 22536T) and Thalassotalea ganghwensis comb. nov. (type strain JC2041T = IMSNU 14005T = KCTC 12041T = DSM 15355T). The type species of the genus Thalassotalea is Thalassotalea ganghwensis gen. nov., comb. nov. An emended description of the genus Thalassomonas is also proposed.


2013 ◽  
Vol 63 (Pt_4) ◽  
pp. 1297-1303 ◽  
Author(s):  
Keun Sik Baik ◽  
Han Na Choe ◽  
Seong Chan Park ◽  
Yeoung Min Hwang ◽  
Eun Mi Kim ◽  
...  

Two yellow-pigmented, Gram-reaction-negative strains, designated 01SU5-PT and 03SU3-PT, were isolated from the freshwater of Woopo wetland, Republic of Korea. Both strains were aerobic, non-motile and catalase-negative. Phylogenetic analysis based on 16S rRNA gene sequences indicated that the two isolates belong to the genus Sphingopyxis , showing the highest level of sequence similarity with respect to Sphingopyxis witflariensis W-50T (95.4–95.7 %). The two novel isolates shared 99.4 % sequence similarity. DNA–DNA hybridization between the isolates and the type strain of S. witflariensis clearly suggested that strains 01SU5-PT and 03SU3-PT represent two separate novel species in the genus Sphingopyxis . The two strains displayed different fingerprints after PCR analysis using the repetitive primers BOX, ERIC and REP. Several phenotypic characteristics served to differentiate these two isolates from recognized members of the genus Sphingopyxis . The data from the polyphasic study presented here indicated that strains 01SU5-PT and 03SU3-PT should be classified as representing novel species in the genus Sphingopyxis , for which the names Sphingopyxis rigui sp. nov. and Sphingopyxis wooponensis sp. nov., respectively, are proposed. The type strain of Sphingopyxis rigui sp. nov. is 01SU5-PT ( = KCTC 23326T = JCM 17509T) and the type strain of Sphingopyxis wooponensis sp. nov. is 03SU3-PT ( = KCTC 23340T = JCM 17547T).


2013 ◽  
Vol 63 (Pt_11) ◽  
pp. 4113-4117 ◽  
Author(s):  
Jung-Hoon Yoon ◽  
Sooyeon Park ◽  
Yong-Taek Jung ◽  
Jung-Sook Lee ◽  
Keun-Chul Lee

A Gram-stain-negative, aerobic, motile and rod-shaped bacterial strain, designated WT-RY4T, was isolated from wood falls in the South Sea, South Korea, and its taxonomic position was investigated using a polyphasic approach. Strain WT-RY4T grew optimally at 25 °C, at pH 7.0–7.5 and in the absence of NaCl. A neighbour-joining phylogenetic tree based on 16S rRNA gene sequences showed that strain WT-RY4T clustered with the type strain of Paraperlucidibaca baekdonensis with a bootstrap resampling value of 100 %. Strain WT-RY4T exhibited 16S rRNA gene sequence similarity values of 98.8 % and 96.3 % to Paraperlucidibaca baekdonensis RL-2T and Perlucidibaca piscinae IMCC 1704T, respectively and less than 91.5 % to the type strains of other species used in the phylogenetic analysis. The DNA G+C content of strain WT-RY4T was 52.4 mol% and the mean DNA–DNA relatedness value with Paraperlucidibaca baekdonensis RL-2T was 25 %. Strain WT-RY4T contained Q-11 as the predominant ubiquinone and summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c), C16 : 0 and C12 : 0 3-OH as the major fatty acids. Differential phenotypic properties, together with the phylogenetic and genetic distinctiveness, demonstrated that strain WT-RY4T was distinguishable from Paraperlucidibaca baekdonensis RL-2T. On the basis of the data presented, strain WT-RY4T is considered to represent a novel species of the genus Paraperlucidibaca , for which the name Paraperlucidibaca wandonensis sp. nov. is proposed. The type strain is WT-RY4T ( = KCTC 32216T = CCUG 63419T). An emended description of the genus Paraperlucidibaca is also provided.


Sign in / Sign up

Export Citation Format

Share Document