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Sunday, July 7, 2019

Isolation and characterization of an interactive culture of two Paenibacillus species with moderately thermophilic desulfurization ability.

To isolate and characterize novel thermophilic bacteria capable of biodesulfurization of petroleum.A culture containing two Paenibacillus spp. (denoted “32O-W” and “32O-Y”) was isolated by repeated passage of a soil sample at up to 55 °C in medium containing dibenzothiophene (DBT) as sulfur source. Only 32O-Y metabolized DBT, apparently via the 4S pathway; maximum activity occurred from 40 to 45 °C, with some activity up to at least 50 °C. 32O-W enhanced DBT metabolism by 32O-Y (by 22-74 % at 40-50 °C). With sulfate as sulfur source, 32O-Y and 32O-W grew well up to 58 and 63 °C, respectively. Selection of a mixed culture of 32O-Y and…

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Sunday, July 7, 2019

Complete genome of the potential thermozyme producer Anoxybacillus gonensis G2(T) isolated from the Gönen hot springs in Turkey.

Anoxybacillus gonensis type strain G2(T) (=NCIMB 13,933(T) =NCCB 100040(T)) has been isolated from the Gönen hot springs in Turkey. This strain produces a number of well-studied, biotechnologically important enzymes, including xylose isomerase, carboxylesterase, and fructose-1,6-bisphosphate aldolase. In addition, this strain is an excellent candidate for the bioremediation of areas with heavy metal pollution. Here, we present a high-quality, annotated, complete genome of A. gonensis G2(T). Furthermore, this report provides insights into several novel enzymes of strain G2(T) and their potential industrial applications. Copyright © 2015 Elsevier B.V. All rights reserved.

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Sunday, July 7, 2019

Complete genome sequence, metabolic model construction and phenotypic characterization of Geobacillus LC300, an extremely thermophilic, fast growing, xylose-utilizing bacterium.

We have isolated a new extremely thermophilic fast-growing Geobacillus strain that can efficiently utilize xylose, glucose, mannose and galactose for cell growth. When grown aerobically at 72°C, Geobacillus LC300 has a growth rate of 2.15h(-1) on glucose and 1.52h(-1) on xylose (doubling time less than 30min). The corresponding specific glucose and xylose utilization rates are 5.55g/g/h and 5.24g/g/h, respectively. As such, Geobacillus LC300 grows 3-times faster than E. coli on glucose and xylose, and has a specific xylose utilization rate that is 3-times higher than the best metabolically engineered organism to date. To gain more insight into the metabolism of…

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Sunday, July 7, 2019

Genome sequence of a native-feather degrading extremely thermophilic Eubacterium, Fervidobacterium islandicum AW-1.

Fervidobacterium islandicum AW-1 (KCTC 4680) is an extremely thermophilic anaerobe isolated from a hot spring in Indonesia. This bacterium could degrade native chicken feathers completely at 70 °C within 48 h, which is of potential importance on the basis of relevant environmental and agricultural issues in bioremediation and development of eco-friendly bioprocesses for the treatment of native feathers. However, its genomic and phylogenetic analysis remains unclear. Here, we report the high-quality draft genome sequence of an extremely thermophilic anaerobe, F. islandicum AW-1. The genome consists of 2,359,755 bp, which encodes 2,184 protein-coding genes and 64 RNA-encoding genes. This may reveal insights into anaerobic…

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Sunday, July 7, 2019

Complete genome sequence of the chromate-reducing bacterium Thermoanaerobacter thermohydrosulfuricus strain BSB-33.

Thermoanaerobacter thermohydrosulfuricus BSB-33 is a thermophilic gram positive obligate anaerobe isolated from a hot spring in West Bengal, India. Unlike other T. thermohydrosulfuricus strains, BSB-33 is able to anaerobically reduce Fe(III) and Cr(VI) optimally at 60 °C. BSB-33 is the first Cr(VI) reducing T. thermohydrosulfuricus genome sequenced and of particular interest for bioremediation of environmental chromium contaminations. Here we discuss features of T. thermohydrosulfuricus BSB-33 and the unique genetic elements that may account for the peculiar metal reducing properties of this organism. The T. thermohydrosulfuricus BSB-33 genome comprises 2597606 bp encoding 2581 protein genes, 12 rRNA, 193 pseudogenes and has a G?+?C…

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Sunday, July 7, 2019

Genome sequence of Geobacillus thermoglucosidasius DSM2542, a platform hosts for biotechnological applications with industrial potential.

Thermophilic Geobacillus thermoglucosidasius could ferment a wide range of substrates with low nutrient requirements for growth. Here, the first released the complete genome sequence of G. thermoglucosidasius DSM2542 may facilitate the design of rational strategies for further strain improvements and provide information for exploring industrially interesting enzymes with thermotolerant properties. Copyright © 2015 Elsevier B.V. All rights reserved.

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Sunday, July 7, 2019

Draft genome sequence of Thermus scotoductus strain K1, Isolated from a geothermal spring in Karvachar, Nagorno Karabakh.

The 2,379,636-bp draft genome sequence of Thermus scotoductus strain K1, isolated from geothermal spring outlet located in the Karvachar region in Nagorno Karabakh is presented. Strain K1 shares about 80% genome sequence similarity with T. scotoductus strain SA-01, recovered from a deep gold mine in South Africa. Copyright © 2015 Saghatelyan et al.

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Sunday, July 7, 2019

Complete genome sequence of Thermus brockianus GE-1 reveals key enzymes of xylan/xylose metabolism.

Thermus brockianus strain GE-1 is a thermophilic, Gram-negative, rod-shaped and non-motile bacterium that was isolated from the Geysir geothermal area, Iceland. Like other thermophiles, Thermus species are often used as model organisms to understand the mechanism of action of extremozymes, especially focusing on their heat-activity and thermostability. Genome-specific features of T. brockianus GE-1 and their properties further help to explain processes of the adaption of extremophiles at elevated temperatures. Here we analyze the first whole genome sequence of T. brockianus strain GE-1. Insights of the genome sequence and the methodologies that were applied during de novo assembly and annotation are…

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Sunday, July 7, 2019

The third restriction-modification system from Thermus aquaticus YT-1: solving the riddle of two TaqII specificities.

Two restriction-modification systems have been previously discovered in Thermus aquaticus YT-1. TaqI is a 263-amino acid (aa) Type IIP restriction enzyme that recognizes and cleaves within the symmetric sequence 5′-TCGA-3′. TaqII, in contrast, is a 1105-aa Type IIC restriction-and-modification enzyme, one of a family of Thermus homologs. TaqII was originally reported to recognize two different asymmetric sequences: 5′-GACCGA-3′ and 5′-CACCCA-3′. We previously cloned the taqIIRM gene, purified the recombinant protein from Escherichia coli, and showed that TaqII recognizes the 5′-GACCGA-3′ sequence only. Here, we report the discovery, isolation, and characterization of TaqIII, the third R-M system from T. aquaticus YT-1.…

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Sunday, July 7, 2019

Complete genome sequence of the thermophilic bacterium Geobacillus subterraneus KCTC 3922(T) as a potential denitrifier.

Denitrification is a crucial process for the global nitrogen cycle through the reduction of nitrates by heterotrophic bacteria. Denitrifying microorganisms play an important role in eliminating fixed nitrogen pollutants from the ecosystem, concomitant with N2O emission. Although many microbial denitrifiers have been identified, little is known about the denitrifying ability of the genus Geobacillus. Here, we report the first complete genome sequences of Geobacillus subterraneus KCTC 3922(T), isolated from Liaohe oil field in China, and G. thermodenitrificans KCTC 3902(T). The strain KCTC 3922(T) contains a complete set of genes involved in denitrification, cofactor biogenesis, and transport systems, which is consistent…

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Sunday, July 7, 2019

Complete genome analysis of Thermus parvatiensis and comparative genomics of Thermus spp. provide insights into genetic variability and evolution of natural competence as strategic survival attributes.

Thermophilic environments represent an interesting niche. Among thermophiles, the genus Thermus is among the most studied genera. In this study, we have sequenced the genome of Thermus parvatiensis strain RL, a thermophile isolated from Himalayan hot water springs (temperature >96°C) using PacBio RSII SMRT technique. The small genome (2.01 Mbp) comprises a chromosome (1.87 Mbp) and a plasmid (143 Kbp), designated in this study as pTP143. Annotation revealed a high number of repair genes, a squeezed genome but containing highly plastic plasmid with transposases, integrases, mobile elements and hypothetical proteins (44%). We performed a comparative genomic study of the group…

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Sunday, July 7, 2019

Complete genome sequences of two interactive moderate thermophiles, Paenibacillus napthalenovorans 32O-Y and Paenibacillus sp. 32O-W.

Microorganisms with the capability to desulfurize petroleum are in high demand with escalating restrictions currently placed on fuel purity. Thermophilic desulfurizers are particularly valuable in high-temperature industrial applications. We report the whole-genome sequences of Paenibacillus napthalenovorans 32O-Y and Paenibacillus sp. 32O-W, which can and cannot, respectively, metabolize dibenzothiophene. Copyright © 2016 Butler et al.

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Sunday, July 7, 2019

High-quality draft genome sequence of the Thermus amyloliquefaciens type strain YIM 77409(T) with an incomplete denitrification pathway.

Thermus amyloliquefaciens type strain YIM 77409(T) is a thermophilic, Gram-negative, non-motile and rod-shaped bacterium isolated from Niujie Hot Spring in Eryuan County, Yunnan Province, southwest China. In the present study we describe the features of strain YIM 77409(T) together with its genome sequence and annotation. The genome is 2,160,855 bp long and consists of 6 scaffolds with 67.4 % average GC content. A total of 2,313 genes were predicted, comprising 2,257 protein-coding and 56 RNA genes. The genome is predicted to encode a complete glycolysis, pentose phosphate pathway, and tricarboxylic acid cycle. Additionally, a large number of transporters and enzymes for heterotrophy…

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