Functional and structural characterization of the minimal Sec translocase of the hyperthermophile Thermotoga maritimaSpringer Science and Business Media LLC - Tập 9 - Trang 307-316 - 2005
Monika G. Pretz, Hervé Remigy, Jelto Swaving, Sonja V. Albers, Victoria G. Garrido, Mohamed Chami, Andreas Engel, Arnold J. M. Driessen
The genome of the hyperthermophilic bacterium Thermotoga maritima contains the genes that encode core subunits of the protein translocase, a complex consisting of the molecular motor SecA and the protein conducting pore SecYE. In addition, we identified an erroneous sequence in the genome encoding for a putative secG gene. The genes of the T. maritima translocase subunits were overexpressed in Esc...... hiện toàn bộ
Characterization of cofactor-dependent and cofactor-independent phosphoglycerate mutases from ArchaeaSpringer Science and Business Media LLC - Tập 11 - Trang 647-657 - 2007
Ulrike Johnsen, Peter Schönheit
Phosphoglycerate mutases (PGM) catalyze the reversible conversion of 3-phosphoglycerate and 2-phosphoglycerate as part of glycolysis and gluconeogenesis. Two structural and mechanistically unrelated types of PGMs are known, a cofactor (2,3-bisphosphoglycerate)-dependent (dPGM) and a cofactor-independent enzyme (iPGM). Here, we report the characterization of the first archaeal cofactor-dependent PG...... hiện toàn bộ
Thermoactive extracellular proteases of Geobacillus caldoproteolyticus, sp. nov., from sewage sludgeSpringer Science and Business Media LLC - Tập 8 - Trang 489-498 - 2004
Xiao-Ge Chen, Olena Stabnikova, Joo-Hwa Tay, Jing-Yuan Wang, Stephen Tiong-Lee Tay
A proteolytic thermophilic bacterial strain, designated as strain SF03, was isolated from sewage sludge in Singapore. Strain SF03 is a strictly aerobic, Gram stain-positive, catalase-positive, oxidase-positive, and endospore-forming rod. It grows at temperatures ranging from 35 to 65°C, pH ranging from 6.0 to 9.0, and salinities ranging from 0 to 2.5%. Phylogenetic analyses revealed that strain SF...... hiện toàn bộ
Solid-state fermentation as a potential technique for esterase/lipase production by halophilic archaeaSpringer Science and Business Media LLC - Tập 19 - Trang 1121-1132 - 2015
Martha Martin del Campo, Rosa M. Camacho, Juan C. Mateos-Díaz, Marcelo Müller-Santos, Jesus Córdova, Jorge A. Rodríguez
Halophilic archaea are extremophiles, adapted to high-salt environments, showing a big biotechnological potential as enzyme, lipids and pigments producers. Four inert supports (perlite, vermiculite, polyurethane foam and glass fiber) were employed for solid-state fermentation (SSF) of the halophilic archaeon Natronococcus sp. TC6 to investigate biomass and esterase production. A very low esterase ...... hiện toàn bộ
Identification of thermoacidophilic bacteria and a new Alicyclobacillus genomic species isolated from acidic environments in JapanSpringer Science and Business Media LLC - Tập 6 - Trang 333-340 - 2002
Keiichi Goto, Yasuhide Tanimoto, Takashi Tamura, Kaoru Mochida, Daisuke Arai, Mika Asahara, Masayuki Suzuki, Hidehiko Tanaka, Kenji Inagaki
Sixty strains of thermoacidophilic bacteria have been isolated from soil and water samples obtained from various acidic environments in Japan. An initial comparative sequence analysis of the hypervariable regions of the 16S rDNA revealed that all strains could be assigned to the Alicyclobacillus acidocaldarius–Alicyclobacillus genomic species 1 group, which could be further subdivided into three c...... hiện toàn bộ
Cloning and characterization of a cold-active xylanase enzyme from an environmental DNA librarySpringer Science and Business Media LLC - Tập 10 - Trang 295-300 - 2006
Charles C. Lee, Rena E. Kibblewhite-Accinelli, Kurt Wagschal, George H. Robertson, Dominic W. S. Wong
There is a great interest in xylanases due to the wide variety of industrial applications for these enzymes. We cloned a xylanase gene (xyn8) from an environmental genomic DNA library. The encoded enzyme was predicted to be 399 amino acids with a molecular weight of 45.9 kD. The enzyme was categorized as a glycosyl hydrolase family 8 member based on sequence analysis of the putative catalytic doma...... hiện toàn bộ
Structure-dependent relationships between growth temperature of prokaryotes and the amino acid frequency in their proteinsSpringer Science and Business Media LLC - Tập 11 - Trang 585-596 - 2007
Gisle Sælensminde, Øyvind Halskau, Ronny Helland, Nils-Peder Willassen, Inge Jonassen
We studied the amino acid frequency and substitution patterns between homologues of prokaryotic species adapted to temperatures in the range 0–102°C, and found a significant temperature-dependent difference in frequency for many of the amino acids. This was particularly clear when we analysed the surface and core residues separately. The difference between the surface and the core is getting more ...... hiện toàn bộ