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Disposable luciferase-based microfluidic chip for rapid assay of water pollution / I. Denisov [et al.] // Lumin. - 2018. - Vol. 33, Is. 6. - P1054-1061, DOI 10.1002/bio.3508 . - ISSN 1522-7235
Кл.слова (ненормированные):
bioassay -- lab-on-a-chip -- luciferase -- microfluidics -- solvent bonding
Аннотация: In the present study, we demonstrate the use of a disposable luciferase-based microfluidic bioassay chip for environmental monitoring and methods for fabrication. The designed microfluidic system includes a chamber with immobilized enzymes of bioluminescent bacteria Photobacterium leiognathi and Vibrio fischeri and their substrates, which dissolve after the introduction of the water sample and thus activate bioluminescent reactions. Limits of detection for copper (II) sulfate, 1,3-dihydroxybenzene and 1,4-benzoquinone for the proposed microfluidic biosensor measured 3 ?M, 15 mM, and 2 ?M respectively, and these values are higher or close to the level of conventional environmental biosensors based on lyophilized bacteria. Approaches for entrapment of enzymes on poly(methyl methacrylate) (PMMA) plates using a gelatin scaffold and solvent bonding of PMMA chip plates under room temperature were suggested. The proposed microfluidic system may be used with some available luminometers and future portable luminescence readers. © 2018 John Wiley & Sons, Ltd.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Biophysics SB RAS Federal Research Center'Krasnoyarsk Science Center SB RAS’, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Denisov, I.; Lukyanenko, K.; Yakimov, A.; Kukhtevich, I.; Esimbekova, E.; Belobrov, P.

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Screening of biopolymeric materials for cardiovascular surgery toxicity—Evaluation of their surface relief with assessment of morphological aspects of monocyte/macrophage polarization in atherosclerosis patients / N. G. Menzyanova [et al.] // Toxicol. Rep. - 2019. - Vol. 6. - P74-90, DOI 10.1016/j.toxrep.2018.11.009 . - ISSN 2214-7500
Кл.слова (ненормированные):
Atherosclerosis -- Cell morphology -- Intravascular stenting -- Macrophages -- Monocytes -- Polyhydroxyalkanoates
Аннотация: The morphotypes of human macrophages (MPh) were studied in the culture on nano-structured biopolymer substrates, made from polyhydroxyalcanoates (PHAs) of five various monomer compositions, followed by the solvent evaporation. Its surface relief, which was further in direct contact with human cells in vitro, was analyzed by atomic force microscopy (AFM) and scanning electron microscopy (SEM). It was shown, that the features of the micro/nano relief depend on the monomeric composition of the polymer substrates. Monocytes (MN) of patients with atherosclerosis and cardiac ischemia, undergoing stenting and conventional anti-atherosclerotic therapy, were harvested prior and after stenting. MN were isolated and cultured, with the transformation into MPh in direct contact with biopolymer culture substrates with different monomer composition and nano-reliefs, and transformed into MPh, in comparison with the same process on standard culture plastic. Sub-populations of cells with characteristic morphology in each phenotypic class were described, and their quantitative ratios for each sample of polymers were counted as an intermediate result in the development of “smart” material for cardiovascular devices. The results obtained allow us to assume, that the processes of MPh differentiation and polarization in vitro depend not only on the features of the micro/nano relief of biopolymer substrates, but also on the initial state of MN in vivo and general response of patients. © 2018 The Authors

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Держатели документа:
Siberian Federal University, 79, Svobodny av., Krasnoyarsk, 660041, Russian Federation
Institute of Biophysics, Siberian Branch of the Russian Academy of Sciences, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
L.V. Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, 50/38 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Federal Research Center Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences, 50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Federal Center for Cardiovascular Surgery, 45 Karaulnaya, Krasnoyarsk, 660020, Russian Federation

Доп.точки доступа:
Menzyanova, N. G.; Pyatina, S. А.; Nikolaeva, E. D.; Shabanov, A. V.; Nemtsev, I. V.; Stolyarov, D. P.; Dryganov, D. B.; Sakhnov, E. V.; Shishatskaya, E. I.

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Methanolobus psychrotolerans sp. nov., a psychrotolerant methanoarchaeon isolated from a saline meromictic lake in siberia / S. -C. Chen [et al.] // Int. J. Syst. Evol. Microbiol. - 2018. - Vol. 68, Is. 4. - P1378-1383, DOI 10.1099/ijsem.0.002685 . - ISSN 1466-5026
Кл.слова (ненормированные):
Archaea -- Lake shira -- Methanogen -- Methanolobus -- Psychrotolerant -- Saline meromictic lake
Аннотация: A psychrotolerant, methylotrophic methanogen, strain YSF-03T, was isolated from the saline meromictic Lake Shira in Siberia. Cells of strain YSF-03T were non-motile, irregular cocci and 0.8–1.2?m in diameter. The methanogenic substrates utilized by strain YSF-03T were methanol and trimethylamine. The temperature range of growth for strain YSF-03T was from 0 to 37 °C. The optimum growth conditions were 30–37 °C, pH 7.0–7.4 and 0.17M NaCl. The G+C content of the genome of strain YSF-03T was 41.3 mol%. Phylogenetic analysis revealed that strain YSF-03T was most closely related to Methanolobus profundi MobMT (98.15% similarity in 16S rRNA gene sequence). Genome relatedness between strain YSF-03T and MobMT was computed using the Genome-to-Genome Distance Calculator and average nucleotide identity, which gave values of 23.5 and 79.3 %, respectively. Based on the morphological, phenotypic, phylogenetic and genomic relatedness data presented here, it is evident that strain YSF-03T represents a novel species of the genus Methanolobus, for which the name Methanolobus psychrotolerans sp. nov. is proposed. The type strain is YSF-03T (=BCRC AR10049T=DSM 104044T=NBRC 112514T). © 2018 IUMS.

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Держатели документа:
Department of Life Science, National Chung Hsing University, Taiwan
Agricultural Biotechnology Center, National Chung Hsing University, Taiwan
Biodiversity Research Center, Academia Sinica, Taiwan
Institute of Biophysics Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Chen, S. -C.; Huang, H. -H.; Lai, M. -C.; Weng, C. -Y.; Chiu, H. -H.; Tang, S. -L.; Rogozin, D. Y.; Degermendzhy, A. G.

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Production and properties of bacterial cellulose by the strain Komagataeibacter xylinus B-12068 / T. G. Volova [et al.] // Appl. Microbiol. Biotechnol. - 2018. - P1-12, DOI 10.1007/s00253-018-9198-8 . - ISSN 0175-7598
Кл.слова (ненормированные):
Bacterial cellulose -- Growth conditions -- Komagataeibacter xylinus -- Biocompatibility -- Cell culture -- Cellulose -- Cultivation -- Glucose -- 3t3 mouse fibroblasts -- Bacterial cellulose -- Cultivation conditions -- Emission spectrometry -- Ethanol concentrations -- Growth conditions -- Komagataeibacter xylinus -- Physical and mechanical properties -- Substrates
Аннотация: A strain of acetic acid bacteria, Komagataeibacter xylinus B-12068, was studied as a source for bacterial cellulose (BC) production. The effects of cultivation conditions (carbon sources, temperature, and pH) on BC production and properties were studied in surface and submerged cultures. Glucose was found to be the best substrate for BC production among the sugars tested; ethanol concentration of 3% (w/v) enhanced the productivity of BC. Optimization of medium and cultivation conditions ensures a high production of BC on glucose and glycerol, up to 2.4 and 3.3 g/L/day, respectively. C/N elemental analysis, emission spectrometry, SEM, DTA, and X-ray were used to investigate the structure and physical and mechanical properties of the BC produced under different conditions. MTT assay and SEM showed that native cellulose membrane did not cause cytotoxicity upon direct contact with NIH 3T3 mouse fibroblast cells and was highly biocompatible. © 2018 Springer-Verlag GmbH Germany, part of Springer Nature

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Держатели документа:
Siberian Federal University, 79 Svobodny pr, Krasnoyarsk, Russian Federation
Institute of Biophysics SB RAS, Siberian Federal University, Akademgorodok 50/50, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Volova, T. G.; Prudnikova, S. V.; Sukovatyi, A. G.; Shishatskaya, E. I.

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Synthesis of Polyhydroxyalkanoates by Hydrogen-Oxidizing Bacteria in a Pilot Production Process / T. Volova [et al.] // Biomacromolecules. - 2019, DOI 10.1021/acs.biomac.9b00295 . - Article in press. - ISSN 1525-7797
Кл.слова (ненормированные):
Crystallinity -- Fructose -- Glucose -- Pilot plants -- Purification -- Substrates -- Terpolymers -- Carbon substrates -- Cell concentrations -- Degree of crystallinity -- Hydrogen-oxidizing bacteria -- Polies (3 hydroxybutyrate co 3 hydroxyvalerate co 4 hydroxybutyrate) -- Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) -- Polyhydroxyalkanoates -- Yield coefficient -- Glycerol
Аннотация: The synthesis of polyhydroxyalkanoates (PHAs) was scaled up to pilot production in a 150-L fermenter on sugars (fructose and glucose) and purified and crude glycerol in a culture of the wild-type strain Cupriavidus necator B-10646. Over 60 h of cultivation, a cell concentration of 150-160 g/L was obtained on purified glycerol and glucose; cultivation on fructose and crude glycerol resulted in a cell concentration of 130 ± 10 g/L. Polymer content and yield coefficients for the biomass were similar on all substrates (80-85 wt % and 0.29-0.33 kg biomass/kg carbon substrate, respectively). Copolymers poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and poly(3-hydroxybutyrate-co-4-hydroxybutyrate) and terpolymers poly(3-hydroxybutyrate-co-3-hydroxyvalerate-co-4-hydroxybutyrate) having a decreased degree of crystallinity (36-46%) were first synthesized in the scaled-up process using C. necator B-10646 cultivated on glycerol. These results will provide the basis for scaling-up PHA synthesis in an organotrophic C. necator B-10646 culture. © 2019 American Chemical Society.

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Держатели документа:
Siberian Federal University, 79 Svobodnyi Av., Krasnoyarsk, 660041, Russian Federation
Institute of Biophysics SB RAS, Federal Research Center Krasnoyarsk Science Center SB RAS, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Volova, T.; Kiselev, E.; Zhila, N.; Shishatskaya, E.

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Cupriavidus necator B-10646 growth and polyhydroxyalkanoates production on different plant oils / T. Volova, K. Sapozhnikova, N. Zhila // Int. J. Biol. Macromol. - 2020. - Vol. 164. - P121-130, DOI 10.1016/j.ijbiomac.2020.07.095 . - ISSN 0141-8130
Кл.слова (ненормированные):
Cupriavidus necator B-10646 -- Emulsifiers -- Fatty acids -- Plant oils -- Polyhydroxyalkanoates
Аннотация: The study addresses the growth of the wild-type strain Cupriavidus necator B-10646 and synthesis of polyhydroxyalkanoates by this strain on media containing plant oils with different compositions of fatty acids: palm, Siberian oilseed, and refined and unrefined sunflower seed oils. The study showed that the best carbon substrate was palm oil. Comparison of fatty acid compositions of the starting oils and unutilized residual substrates showed that C. necator B-10646 cells consumed the fatty acids from palm oil evenly while in experiments with other oils, they utilized polyenoic fatty acids first. Higher production parameters of the culture were obtained by preparation of emulsified oil medium using Tween 80 and sodium cocoyl glutamate as emulsifiers. All polyhydroxyalkanoate specimens were terpolymers that contained 3-hydroxybutyrate as the major component and minor amounts of 3-hydroxyvalerate (0.9–1.9 mol%) and 3-hydroxyhexanoate (0.5–1.1 mol%). Molecular weight of polyhydroxyalkanoate specimens depended on the type of plant oil and emulsifier. © 2020

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Держатели документа:
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Volova, T.; Sapozhnikova, K.; Zhila, N.

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Exploring Bioluminescence Function of the Ca2+-regulated Photoproteins with Site-directed Mutagenesis / E. V. Eremeeva, E. S. Vysotski // Photochem. Photobiol. - 2019. - Vol. 95, Is. 1. - P8-23, DOI 10.1111/php.12945. - Cited References:88. - This work was supported by grant 17-04-00764 of Russian Foundation for Basic Research and the state budgetallocated to the fundamental research at the Russian Academy of Sciences (project 0356-2017-0017). . - ISSN 0031-8655. - ISSN 1751-1097

РУБ Biochemistry & Molecular Biology + Biophysics
Рубрики:
CALCIUM-BINDING PHOTOPROTEIN
GREEN-FLUORESCENT PROTEIN
JELLYFISH
Кл.слова (ненормированные):
bioluminescence -- coelenterazine -- aequorin -- obelin -- clytin -- mitrocomin -- EF-hand protein
Аннотация: Site-directed mutagenesis is a powerful tool to investigate the structure-function relationship of proteins and a function of certain amino acid residues in catalytic conversion of substrates during enzymatic reactions. Hence, it is not surprising that this approach was repeatedly applied to elucidate the role of certain amino acid residues in various aspects of photoprotein bioluminescence, mostly for aequorin and obelin, and to design mutant photoproteins with altered properties (modified calcium affinity, faster or slower bioluminescence kinetics, different emission color) which would either allow the development of novel bioluminescent assays or improvement of characteristics of the already existing ones. This information, however, is scattered over different articles. In this review, we systematize the findings that were made using site-directed mutagenesis studies regarding the impact of various amino acid residues on bioluminescence of hydromedusan Ca2+-regulated photoproteins. All key residues that have been identified are pinpointed, and their influence on different aspects of photoprotein functioning such as active photoprotein complex formation, bioluminescence reaction, calcium response and light emitter formation is discussed.

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Держатели документа:
RAS, SB, Inst Biophys, Fed Res Ctr,Krasnoyarsk Sci Ctr,Photobiol Lab, Krasnoyarsk, Russia.

Доп.точки доступа:
Eremeeva, Elena V.; Vysotski, Eugene S.; Russian Foundation for Basic Research [17-04-00764]; Russian Academy of Sciences [0356-2017-0017]

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Nutritional biomarkers: Current view and future perspectives / S. Pande [et al.] // Crit. Rev. Food Sci. Nutr. - 2018. - Vol. 58, Is. 18. - P3055-3069, DOI 10.1080/10408398.2017.1350136. - Cited References:163. - The research was partially supported by the Russian Foundation for Basic Research [Grant No 16-06-00-439], the Russian Ministry of Education, Post-Doctoral Program of Project "5-100" [Grant No. M 2.2.3] and the Russian Foundation for Basic Research in collaboration with Krasnoyarsk Regional Fund for Scientific and Technical Activity Support [project No 16-44-242126]. . - ISSN 1040-8398. - ISSN 1549-7852

РУБ Food Science & Technology + Nutrition & Dietetics
Рубрики:
PROMOTES CELL-SURVIVAL
FATTY-ACID OXIDATION
CALORIE RESTRICTION
Кл.слова (ненормированные):
Sirtuins -- NAD -- biomarker -- proteomics -- calorie restriction -- longitivity
Аннотация: There is a poor relationship between nutrient intake and existing nutritional biomarkers due to variety of factors affecting their sensitivity and specificity. To explore the impact of nutrients at molecular level and devising a sensitive biomarker, proteomics is a central technology with sirtuins as one of the most promising nutritional biomarker. Sirtuins (seven mammalian sirtuins reported so far) have been reported to perform protein deacetylases and ADP-ribosyltransferases activity. It is distributed in different cellular compartments thereby controlling several metabolic processes. Sirtuins are oxidized nicotinamide adenine dinucleotide dependent, which implicates a direct effect of the metabolic state of the cell on its activity. Calorie restriction upregulates the mammalian sirtuin protein levels in variety of tissues and organs where it acts upon both histone and nonhistone substrates. Sirtuin senses nutrient availability and impacts gluconeogenesis, glycolysis, and insulin sensitivity. It deacetylates and inhibits the nuclear receptor that activates fat synthesis and adipogenesis in the body, leading to fat loss and bringing favorable cellular and health changes. Sirtuins mediates intracellular response that promotes cell survival, DNA damage repair thereby increasing the cell longitivity. The activation of sirtuins brings a wide spectrum of other health benefits and its activity levels are indicative of nutritional status as well as disease progression in cancer, inflammation, obesity, cardiovascular diseases, and viral infections. There are several foods that activate sirtuin activity and offer significant health benefits by their consumption.

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Держатели документа:
Siberian Fed Univ, Inst Fundamental Biol & Biotechnol, Dept Biophys, Lab Bioluminescent Biotechnol, Krasnoyarsk, Russia.
Krasnoyarsk State Med Univ, Krasnoyarsk, Russia.
RAS, Siberian Branch, Inst Biophys, Fed State Budgetary Sci Inst, Krasnoyarsk, Russia.
Fed State Budgetary Sci Inst, Sci Res Inst Med Problems North, Krasnoyarsk, Russia.

Доп.точки доступа:
Pande, Shubhra; Kratasyuk, Valentina A.; Medvedeva, Nadezhda N.; Kolenchukova, Oxana A.; Salmina, Alla B.; Kratazyuk, Valentina; KAYITESI, EUGENIE; Russian Foundation for Basic Research [16-06-00-439]; Russian Ministry of Education [M 2.2.3]; Russian Foundation for Basic Research; Krasnoyarsk Regional Fund for Scientific and Technical Activity Support [16-44-242126]

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Synthesis of P(3HB-co-3HHx) copolymers containing high molar fraction of 3-hydroxyhexanoate monomer by Cupriavidus eutrophus B10646 / T. G. Volova [et al.] // J. Chem. Technol. Biotechnol. - 2016. - Vol. 91, Is. 2. - P416-425, DOI 10.1002/jctb.4592 . - ISSN 0268-2575
Кл.слова (ненормированные):
Growth kinetics -- Physicochemical and mechanical properties -- Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) -- Wild-type strain Cupriavidus eutrophus B10646 -- Biomaterials -- Biomechanics -- Chemical industry -- Cultivation -- Growth kinetics -- Mechanical properties -- Organic compounds -- Polymers -- Sodium -- 3-Hydroxyhexanoate -- Bacterial strains -- Cultivation conditions -- Kinetic properties -- Physico-chemical and mechanical properties -- Physiological range -- Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) -- Wild-type strain -- Strain
Аннотация: BACKGROUND: P(3HB-co-3HHx) copolymers are very promising biomaterials. The main challenge in the production of these polymers is to simultaneously achieve high cell biomass; high P(3HB-co-3HHx) content; and high molar fraction of 3HHx in P(3HB-co-3HHx). The most common approach to production of these copolymers is the use of recombinant bacterial strains. The purpose of this study was to optimize the process of production of P(3HB-co-3HHx) copolymers containing high molar fractions of 3HHx by using the wild-type strain Cupriavidus eutrophus B10646. RESULTS: Kinetic properties of C. eutrophus B10646 were studied during cultivation of the cells on substrates necessary for P(3HB-co-3HHx) synthesis: glucose, nitrogen, sodium hexanoate, and sodium acrylate. The physiological ranges of their effects were determined experimentally, and C. eutrophus B10646 was grown in culture media with different dosages of these substrates. P(3HB-co-3HHx) copolymers with different molar fractions of 3HHx, including high ones (12 to 68%), were synthesized, and their physicochemical and mechanical properties were investigated. CONCLUSION: For the first time, cultivation conditions of Cupriavidus eutrophus B10646 enabled production of high biomass yields (5-6gL-1) and high content of the polymer (60-75%) that contained high 3HHx molar fraction. By varying the 3HB/3HHx ratio, one can change physicochemical and mechanical properties of P(3HB-co-3HHx) copolymers. © 2014 Society of Chemical Industry © 2016 Society of Chemical Industry.

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Держатели документа:
Institute of Biophysics SB RAS, Akademgorodok 50, Krasnoyarsk, Russian Federation
Siberian Federal University, 79 Svobodny pr, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Volova, T. G.; Syrvacheva, D. A.; Zhila, N. O.; Sukovatiy, A. G.

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10.

Characteristics of mineral nutrition of plants in the bio-technical life support system with human wastes included in mass exchange / N. Tikhomirova [et al.] // Acta Astronaut. - 2016. - Vol. 126. - P59-65, DOI 10.1016/j.actaastro.2016.04.020 . - ISSN 0094-5765
Кл.слова (ненормированные):
Bio-technical life support system -- Human wastes -- Ion-exchange substrate -- Wheat -- Grain growth -- Nutrients -- Nutrition -- Substrates -- Human waste -- Ion exchange substrates -- Liquid products -- Mineral nutrition -- Nutrient solution -- Reproductive organs -- Vegetative organs -- Wheat -- Ion exchange
Аннотация: The study addresses the effectiveness of using ion exchange substrates (IES) to optimize mineral nutrition of plants grown in the nutrient solutions containing oxidized human wastes for application in bio-technical life support systems. The study shows that the addition of IES to the root-inhabited substrate is favorable for the growth of wheat vegetative organs but causes a decrease in the grain yield. By contrast, the addition of IES to the nutrient solution does not influence the growth of vegetative organs but favors normal development of wheat reproductive organs. Thus, to choose the proper method of adjusting the solution with IES, one should take into account specific parameters of plant growth and development and the possibility of multiple recycling of IES based on the liquid products of mineralization of human wastes. © 2016 IAA. Published by Elsevier Ltd. All rights reserved.

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Держатели документа:
Institute of Biophysics, Russian Academy of Sciences, Siberian Branch, Akademgorodok, 50, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsky Rabochy Av., 31, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Tikhomirova, N.; Ushakova, S.; Kalacheva, G.; Tikhomirov, A.

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11.

The Chemical Basis of Fungal Bioluminescence / K. V. Purtov [et al.] // Angew. Chem. Int. Ed. - 2015. - Vol. 54, Is. 28. - P8124-8128, DOI 10.1002/anie.201501779 . - ISSN 1433-7851
Кл.слова (ненормированные):
bioluminescence -- bioorganic chemistry -- biosynthesis -- luciferin -- natural products -- Biochemistry -- Bioluminescence -- Biosynthesis -- Metabolites -- Phosphorescence -- Biochemical mechanisms -- Bioorganic chemistry -- luciferin -- Natural products -- Plant secondary metabolites -- Structural similarity -- Fungi
Аннотация: Many species of fungi naturally produce light, a phenomenon known as bioluminescence, however, the fungal substrates used in the chemical reactions that produce light have not been reported. We identified the fungal compound luciferin 3-hydroxyhispidin, which is biosynthesized by oxidation of the precursor hispidin, a known fungal and plant secondary metabolite. The fungal luciferin does not share structural similarity with the other eight known luciferins. Furthermore, it was shown that 3-hydroxyhispidin leads to bioluminescence in extracts from four diverse genera of luminous fungi, thus suggesting a common biochemical mechanism for fungal bioluminescence. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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Держатели документа:
Institute of Biophysics, Siberian Branch of the Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, Russian Federation
Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya 16/10, Moscow, Russian Federation
Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
Pirogov Russian National Research Medical University, Ostrovitianov 1, Moscow, Russian Federation

Доп.точки доступа:
Purtov, K.V.; Petushkov, V.N.; Baranov, M.S.; Mineev, K.S.; Rodionova, N.S.; Kaskova, Z.M.; Tsarkova, A.S.; Petunin, A.I.; Bondar, V.S.; Rodicheva, E.K.; Medvedeva, S.E.; Oba, Y.; Arseniev, A.S.; Lukyanov, S.; Gitelson, J.I.; Yampolsky, I.V.

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12.

Coelenterazine-dependent luciferases / S. V. Markova, E. S. Vysotski // Biochemistry Moscow. - 2015. - Vol. 80, Is. 6. - P714-732, DOI 10.1134/S0006297915060073 . - ISSN 0006-2979
Кл.слова (ненормированные):
bioluminescence -- coelenterazine -- luciferase -- luciferin -- Coelenterata -- Cypridina luciferin -- Fungi -- Hexapoda -- Mollusca -- Protozoa
Аннотация: Bioluminescence is a widespread natural phenomenon. Luminous organisms are found among bacteria, fungi, protozoa, coelenterates, worms, molluscs, insects, and fish. Studies on bioluminescent systems of various organisms have revealed an interesting feature - the mechanisms underlying visible light emission are considerably different in representatives of different taxa despite the same final result of this biochemical process. Among the several substrates of bioluminescent reactions identified in marine luminous organisms, the most commonly used are imidazopyrazinone derivatives such as coelenterazine and Cypridina luciferin. Although the substrate used is the same, bioluminescent proteins that catalyze light emitting reactions in taxonomically remote luminous organisms do not show similarity either in amino acid sequences or in spatial structures. In this review, we consider luciferases of various luminous organisms that use coelenterazine or Cypridina luciferin as a substrate, as well as modifications of these proteins that improve their physicochemical and bioluminescent properties and therefore their applicability in bioluminescence imaging in vivo. © 2015 Pleiades Publishing, Ltd.

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Держатели документа:
Institute of Biophysics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Markova, S.V.; Vysotski, E.S.

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13.

Estimating CO2 gas exchange in mixed age vegetable plant communities grown on soil-like substrates for life support systems / V. V. Velichko, A. A. Tikhomirov, S. A. Ushakova // Life Sci. Space Res. - 2018. - Vol. 16. - P47-51, DOI 10.1016/j.lssr.2017.11.001 . - ISSN 2214-5524
Кл.слова (ненормированные):
Bioconversion of plant waste -- CO2 gas exchange -- Conveyor mode -- Plant cultivation -- Soil-like substrate -- carbon dioxide -- Article -- atmosphere -- beet -- carrot -- concentration (parameters) -- Cyperus esculentus -- gas exchange -- genetic variation -- microclimate -- nonhuman -- plant age -- plant community -- plant growth -- planting density -- priority journal -- reproducibility -- soil and soil related phenomena -- soil like substrate -- vegetable
Аннотация: If soil-like substrate (SLS) is to be used in human life support systems with a high degree of mass closure, the rate of its gas exchange as a compartment for mineralization of plant biomass should be understood. The purpose of this study was to compare variations in CO2 gas exchange of vegetable plant communities grown on the soil-like substrate using a number of plant age groups, which determined the so-called conveyor interval. Two experimental plant communities were grown as plant conveyors with different conveyor intervals. The first plant community consisted of conveyors with intervals of 7 days for carrot and beet and 14 days for chufa sedge. The conveyor intervals in the second plant community were 14 days for carrot and beet and 28 days for chufa sedge. This study showed that increasing the number of age groups in the conveyor and, thus, increasing the frequency of adding plant waste to the SLS, decreased the range of variations in CO2 concentration in the “plant–soil-like substrate” system. However, the resultant CO2 gas exchange was shifted towards CO2 release to the atmosphere of the plant community with short conveyor intervals. The duration of the conveyor interval did not significantly affect productivity and mineral composition of plants grown on the SLS. © 2017

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Держатели документа:
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Akademgorodok, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Velichko, V. V.; Tikhomirov, A. A.; Ushakova, S. A.

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14.

Detonation Nanodiamond-Assisted Carbon Nanotube Growth by Hot Filament Chemical Vapor Deposition / I. P. Kudarenko [et al.] // Phys. Status Solidi B-Basic Solid State Phys. - 2018. - Vol. 255, Is. 1. - Ст. 1700286, DOI 10.1002/pssb.201700286. - Cited References:28. - The work was supported by RSF project 17-72-10173. . - ISSN 0370-1972. - ISSN 1521-3951

РУБ Physics, Condensed Matter
Рубрики:
DIAMOND
   FILMS
   HFCVD
   FABRICATION
   GRAPHITE
   SCIENCE
   SIZE
   CVD
Кл.слова (ненормированные):
carbon nanotubes -- catalytic growth -- diamond -- hot filament chemical vapor -- deposition -- nanomaterials -- synthesis
Аннотация: Substrates pretreatment in suspensions of a detonation nanodiamond is widely used for nucleation of diamond growth by chemical vapor deposition (CVD). We found that iron inclusions in the nanodiamond provide catalytical growth of carbon nanotubes during CVD in a hot filament reactor (HF CVD). Carbon nanotubes grow in the area between two adjacent Si wafers. The diameters of such obtained nanotubes were in the range of 10-100 nm and the length of the tubes reaches about 10 mu m. The proposed HF CVD method has convincing potential for the fabrication of carbon nanotube coatings on a large surface area.

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Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119991, Russia.
Univ Eastern Finland, Dept Phys & Math, Joensuu 80101, Finland.
RAS, Fed Sci Res Ctr Crystallog & Photon, AV Shubnikov Inst Crystallog, Moscow 119333, Russia.
Natl Res Ctr, Kurchatov Inst, Moscow 123182, Russia.
Russian Acad Sci, Krasnoyarsk Sci Ctr SB RAS, Fed Res Ctr, Inst Biophys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Kudarenko, Ilya P.; Malykhin, Sergei A.; Orekhov, Andrey S.; Puzyr, Aleksey P.; Kleshch, Victor I.; Ismagilov, Rinat R.; Obraztsov, Alexander N.; RSF [17-72-10173]

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15.

Mechanism and color modulation of fungal bioluminescence / Z. M. Kaskova [et al.] // Sci. Adv. - 2017. - Vol. 3, Is. 4. - Ст. e1602847, DOI 10.1126/sciadv.1602847. - Cited References:40. - This work was supported by the Sao Paulo Research Foundation [FAPESP grants 10/11578-5 (to A.G.O.), 13/16885-1 (to C.V.S.), 14/14866-2 (to E.L.B.), 13/07914-8 (to E.P. and F.A.D.), and 2012/12663-1 (to P.D.M.) and CEPID Redoxoma 2013/07937-8 (to P.D.M.)], the National Council for Scientific and Technological Development (CNPq) [301307/2013-0 (to P.D.M.)], NAP Redoxoma (PRPUSP) [2011.1.9352.1.8. (to P.D.M.)], the Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research (KAKENHI) [grant no. 16K07715 (to Y.O.)], Chubu University [grant AII28II M01 (to Y.O.)], and the Russian Science Foundation (grant 16-14-00052 to all Russian authors). . - ISSN 2375-2548

РУБ Multidisciplinary Sciences
Рубрики:
SINGLET MOLECULAR-OXYGEN
QUANTUM YIELDS
CHEMILUMINESCENCE
Аннотация: Bioluminescent fungi are spread throughout the globe, but details on their mechanism of light emission are still scarce. Usually, the process involves three key components: an oxidizable luciferin substrate, a luciferase enzyme, and a light emitter, typically oxidized luciferin, and called oxyluciferin. We report the structure of fungal oxyluciferin, investigate the mechanism of fungal bioluminescence, and describe theuseof simple synthetic alpha-pyrones as luciferins to produce multicolor enzymatic chemiluminescence. A high-energy endoperoxide is proposed as an intermediate of the oxidation of the native luciferin to the oxyluciferin, which is a pyruvic acid adduct of caffeic acid. Luciferase promiscuity allows the use of simple alpha-pyrones as chemiluminescent substrates.

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Russian Acad Sci, Inst Bioorgan Chem, Miklukho Maklaya 16-10, Moscow 117997, Russia.
Pirogov Russian Natl Res Med Univ, OStrovitianov 1, Moscow 117997, Russia.
SB RAS, Fed Res Ctr Krasnoyarsk Sci Ctr, Inst Biophys, Krasnoyarsk 660036, Russia.
Univ Sao Paulo, Fac Ciencias Farmaceut, Dept Anal Clin & Toxicolgicas, BR-05508900 Sao Paulo, Brazil.
Nagoya Univ, Grad Sch Bioagr Sci, Nagoya, Aichi 4648601, Japan.
Univ Sao Paulo, Inst Quim, Dept Bioquim, BR-05508900 Sao Paulo, Brazil.
Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, BR-05508900 Sao Paulo, Brazil.
Univ Sao Paulo, Inst Oceanografico, Dept Oceanografia Fis Quim & Geol, BR-05508120 Sao Paulo, Brazil.
Chubu Univ, Dept Environm Biol, Kasugai, Aichi 4878501, Japan.

Доп.точки доступа:
Kaskova, Zinaida M.; Dorr, Felipe A.; Petushkov, Valentin N.; Purtov, Konstantin V.; Tsarkova, Aleksandra S.; Rodionova, Natalja S.; Mineev, Konstantin S.; Guglya, Elena B.; Kotlobay, Alexey; Baleeva, Nadezhda S.; Baranov, Mikhail S.; Arseniev, Alexander S.; Gitelson, Josef I.; Lukyanov, Sergey; Suzuki, Yoshiki; Kanie, Shusei; Pinto, Ernani; Di Mascio, Paolo; Waldenmaier, Hans E.; Pereira, Tatiana A.; Carvalho, Rodrigo P.; Oliveira, Anderson G.; Oba, Yuichi; Bastos, Erick L.; Stevani, Cassius V.; Yampolsky, Ilia V.; Sao Paulo Research Foundation [FAPESP] [10/11578-5, 13/16885-1, 14/14866-2, 13/07914-8, 2012/12663-1]; CEPID Redoxoma [2013/07937-8]; National Council for Scientific and Technological Development (CNPq) [301307/2013-0]; NAP Redoxoma (PRPUSP) [2011.1.9352.1.8]; Japan Society for the Promotion of Science [16K07715]; Chubu University [AII28II M01]; Russian Science Foundation [16-14-00052]

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16.

Why does the bioluminescent fungus Armillaria mellea have luminous mycelium but nonluminous fruiting body? / K. V. Purtov [et al.] // Doklad. Biochem. Biophys. - 2017. - Vol. 474, Is. 1. - P217-219, DOI 10.1134/S1607672917030176 . - ISSN 1607-6729
Аннотация: By determining the components involved in the bioluminescence process in luminous and nonluminous organs of the honey fungus Armillaria mellea, we have established causes of partial luminescence of this fungus. The complete set of enzymes and substrates required for bioluminescence is formed only in the mycelium and only under the conditions of free oxygen access. Since the synthesis of luciferin precursor (hispidin) and 3-hydroxyhispidin hydroxylase in the fruiting bodies is blocked, the formation of luciferin—the key component of fungal bioluminescent system—was not observed. That is why the fruiting body of Armillaria mellea is nonluminous despite the presence of luciferase, the enzyme that catalyzes the oxidation of luciferin with a photon emission. © 2017, Pleiades Publishing, Ltd.

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Держатели документа:
Institute of Biophysics, Krasnoyarsk Research Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Purtov, K. V.; Petushkov, V. N.; Rodionova, N. S.; Gitelson, J. I.

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17.

Mechanisms of Viscous Media Effects on Elementary Steps of Bacterial Bioluminescent Reaction / A. E. Lisitsa, L. A. Sukovatyi, S. I. Bartsev [et al.] // Int. J. Mol. Sci. - 2021. - Vol. 22, Is. 16. - Ст. 8827, DOI 10.3390/ijms22168827. - Cited References:59. - The research was funded by the Ministry of Science and Higher Education of the Russian Federation (projects No. FSRZ-2020-0006); by RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science (project No. 20-44-243002); by RFBR according to the research project No. 20-34-90118. . - ISSN 1422-0067

РУБ Biochemistry & Molecular Biology + Chemistry, Multidisciplinary
Рубрики:
FLAVIN INTERMEDIATE
   REDUCED FLAVIN
   RATE CONSTANTS
   LUCIFERASE
Кл.слова (ненормированные):
bacterial luciferase -- non-steady-state reaction kinetics -- viscosity -- diffusion limitation
Аннотация: Enzymes activity in a cell is determined by many factors, among which viscosity of the microenvironment plays a significant role. Various cosolvents can imitate intracellular conditions in vitro, allowing to reduce a combination of different regulatory effects. The aim of the study was to analyze the media viscosity effects on the rate constants of the separate stages of the bacterial bioluminescent reaction. Non-steady-state reaction kinetics in glycerol and sucrose solutions was measured by stopped-flow technique and analyzed with a mathematical model developed in accordance with the sequence of reaction stages. Molecular dynamics methods were applied to reveal the effects of cosolvents on luciferase structure. We observed both in glycerol and in sucrose media that the stages of luciferase binding with flavin and aldehyde, in contrast to oxygen, are diffusion-limited. Moreover, unlike glycerol, sucrose solutions enhanced the rate of an electronically excited intermediate formation. The MD simulations showed that, in comparison with sucrose, glycerol molecules could penetrate the active-site gorge, but sucrose solutions caused a conformational change of functionally important alpha Glu175 of luciferase. Therefore, both cosolvents induce diffusion limitation of substrates binding. However, in sucrose media, increasing enzyme catalytic constant neutralizes viscosity effects. The activating effect of sucrose can be attributed to its exclusion from the catalytic gorge of luciferase and promotion of the formation of the active site structure favorable for the catalysis.

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Держатели документа:
Siberian Fed Univ, Biophys Dept, Svobodny 79, Krasnoyarsk 660041, Russia.
Inst Biophys SB RAS, Akad Gorodok 50-50, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Lisitsa, Albert E.; Sukovatyi, Lev A.; Bartsev, Sergey, I; Deeva, Anna A.; Kratasyuk, Valentina A.; Nemtseva, Elena, V; Nemtseva, Elena; Ministry of Science and Higher Education of the Russian Federation [FSRZ-2020-0006]; RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science [20-44-243002]; RFBRRussian Foundation for Basic Research (RFBR) [20-34-90118]

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18.

Properties of degradable polyhydroxyalkanoates (Phas) synthesized by a new strain, cupriavidus necator ibp/sfu-1, from various carbon sources / N. O. Zhila, K. Yu. Sapozhnikova, E. G. Kiselev [et al.] // Polym. - 2021. - Vol. 13, Is. 18. - Ст. 3142, DOI 10.3390/polym13183142 . - ISSN 2073-4360
Кл.слова (ненормированные):
Cell growth and PHA synthesis -- Cupriavidus necator IBP/SFU-1 -- PHA composition and properties -- Polymer films -- Various carbon sources -- Biodegradable polymers -- Carbon -- Carbon films -- Cell proliferation -- Crystallinity -- Fructose -- Glucose -- Long Term Evolution (LTE) -- Oleic acid -- Organic carbon -- Palm oil -- Polydispersity -- Semiconducting films -- Autotrophics -- Carbon source -- Cell growth and PHA synthesis -- Cupriavidu necator IBP/SFU-1 -- PHA composition and property -- Plant oil -- Polyhydroxyalkanoates -- Property -- Synthesised -- Various carbon source -- Polymer films
Аннотация: The bacterial strain isolated from soil was identified as Cupriavidus necator IBP/SFU-1 and investigated as a PHA producer. The strain was found to be able to grow and synthesize PHAs under autotrophic conditions and showed a broad organotrophic potential towards different carbon sources: sugars, glycerol, fatty acids, and plant oils. The highest cell concentrations (7–8 g/L) and PHA contents were produced from oleic acid (78%), fructose, glucose, and palm oil (over 80%). The type of the carbon source influenced the PHA chemical composition and properties: when grown on oleic acid, the strain synthesized the P(3HB-co-3HV) copolymer; on plant oils, the P(3HB-co-3HV-co-3HHx) terpolymer, and on the other substrates, the P(3HB) homopolymer. The type of the carbon source influenced molecular-weight properties of PHAs: P(3HB) synthesized under autotrophic growth conditions, from CO2, had the highest number-average (290 ± 15 kDa) and weight-average (850 ± 25 kDa) molecular weights and the lowest polydispersity (2.9 ± 0.2); polymers synthesized from organic carbon sources showed increased polydispersity and reduced molecular weight. The carbon source was not found to affect the degree of crystallinity and thermal properties of the PHAs. The type of the carbon source determined not only PHA composition and molecular weight but also surface microstructure and porosity of the polymer films. The new strain can be recommended as a promising P(3HB) producer from palm oil, oleic acid, and sugars (fructose and glucose) and as a producer of P(3HB-co-3HV) from oleic acid and P(3HB-co-3HV-co-3HHx) from palm oil. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

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Держатели документа:
Basic Department of Biotechnology, School of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi Av., Krasnoyarsk, 660041, Russian Federation
Federal Research Center, “Krasnoyarsk Science Center SB RAS”, Institute of Biophysics SB RAS, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Federal Research Center, “Krasnoyarsk Science Center SB RAS”, L.V. Kirensky Institute of Physics SB RAS, 50/38 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Federal Research Center, “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, 50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Zhila, N. O.; Sapozhnikova, K. Yu.; Kiselev, E. G.; Vasiliev, A. D.; Nemtsev, I. V.; Shishatskaya, E. I.; Volova, T. G.

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19.

Single-Crystal Diamond Needle Fabrication Using Hot-Filament Chemical Vapor Deposition / R. Ismagilov, S. Malykhin, A. Puzyr [et al.] // Materials. - 2021. - Vol. 14, Is. 9. - Ст. 2320, DOI 10.3390/ma14092320. - Cited References:32. - This work was supported by the Russian Science Foundation (project no. 19-79-00203) and by the Russian Foundation for Basic Research (grant no. 18-29-19071, in part for PL and Raman inspection). . - ISSN 1996-1944

РУБ Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy &

Кл.слова (ненормированные):
thin films -- diamond needles -- chemical vapor deposition -- hot-filament -- CVD -- large-scale synthesis
Аннотация: Single-crystal diamonds in the form of micrometer-scale pyramids were produced using a combination of hot-filament (HF) chemical vapor deposition (CVD) and thermal oxidation processes. The diamond pyramids were compared here with similar ones that were manufactured using plasma-enhanced (PE) CVD. The similarities revealed in the morphology, Raman, and photoluminescent characteristics of the needles obtained using the hot-filament and plasma-enhanced CVD are discussed in connection with the diamond film growth mechanism. This work demonstrated that the HF CVD method has convincing potential for the fabrication of single-crystal diamond needles in the form of regularly shaped pyramids on a large surface area, even on non-conducting substrates. The experimental results demonstrated the ability for the mass production of the single-crystal needle-like diamonds, which is important for their practical application.

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Держатели документа:
Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119991, Russia.
Univ Eastern Finland, Dept Phys & Math, Joensuu 80101, Finland.
Russian Acad Sci, Lebedev Phys Inst, Div Solid State Phys, Moscow 119991, Russia.
Russian Acad Sci, RAS, Inst Biophys, Fed Res Ctr,Krasnoyarsk Sci Ctr SB, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Ismagilov, Rinat; Malykhin, Sergei; Puzyr, Aleksey; Loginov, Artem; Kleshch, Victor; Obraztsov, Alexander; Russian Science FoundationRussian Science Foundation (RSF) [19-79-00203]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-29-19071]

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20.

Mechanisms of viscous media effects on elementary steps of bacterial bioluminescent reaction / A. E. Lisitsa, L. A. Sukovatyi, S. I. Bartsev [et al.] // Int. J. Mol. Sci. - 2021. - Vol. 22, Is. 16. - Ст. 8827, DOI 10.3390/ijms22168827 . - ISSN 1661-6596
Кл.слова (ненормированные):
Bacterial luciferase -- Diffusion limitation -- Non-steady-state reaction kinetics -- Viscosity
Аннотация: Enzymes activity in a cell is determined by many factors, among which viscosity of the microenvironment plays a significant role. Various cosolvents can imitate intracellular conditions in vitro, allowing to reduce a combination of different regulatory effects. The aim of the study was to analyze the media viscosity effects on the rate constants of the separate stages of the bacterial biolumi-nescent reaction. Non-steady-state reaction kinetics in glycerol and sucrose solutions was measured by stopped-flow technique and analyzed with a mathematical model developed in accordance with the sequence of reaction stages. Molecular dynamics methods were applied to reveal the effects of cosolvents on luciferase structure. We observed both in glycerol and in sucrose media that the stages of luciferase binding with flavin and aldehyde, in contrast to oxygen, are diffusion-limited. More-over, unlike glycerol, sucrose solutions enhanced the rate of an electronically excited intermediate formation. The MD simulations showed that, in comparison with sucrose, glycerol molecules could penetrate the active-site gorge, but sucrose solutions caused a conformational change of functionally important ?Glu175 of luciferase. Therefore, both cosolvents induce diffusion limitation of substrates binding. However, in sucrose media, increasing enzyme catalytic constant neutralizes viscosity effects. The activating effect of sucrose can be attributed to its exclusion from the catalytic gorge of luciferase and promotion of the formation of the active site structure favorable for the catalysis. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Scopus
Держатели документа:
Biophysics Department, Siberian Federal University, Svobodny 79, Krasnoyarsk, 660041, Russian Federation
The Institute of Biophysics SB RAS, Akademgorodok 50/50, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Lisitsa, A. E.; Sukovatyi, L. A.; Bartsev, S. I.; Deeva, A. A.; Kratasyuk, V. A.; Nemtseva, E. V.

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