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Sulfate reduction and methanogenesis in the Shira and Shunet meromictic lakes (Khakasia, Russia) / A. Yu. Kallistova [et al.] // Microbiology. - 2006. - Vol. 75, Is. 6. - P720-726, DOI 10.1134/S0026261706060166 . - ISSN 0026-2617
Кл.слова (ненормированные):
Archaea -- Fluorescence in situ hybridization -- Meromictic lakes -- Sulfate-reducing bacteria -- Archaea -- Armoracia rusticana -- Bacteria (microorganisms)
Аннотация: The biogeochemical and molecular biological study of the chemocline and sediments of saline meromictic lakes Shira and Shunet (Khakasia, Russia) was performed. A marked increase in the rates of sulfate reduction and methanogenesis was revealed at the medium depths of the chemocline. The rates of these processes in the bottom sediments decreased with depth. The numbers of the members of domains Bacteria, Archaea, and of sulfate-reducing bacteria (SRB) were determined by fluorescence in situ hybridization with rRNA specific oligonucleotide probes labeled with horseradish peroxidase and subsequent tyramide signal amplification. In the chemocline, both the total microbial numbers and those of Bacteria were shown to increase with depth. The archaea and SRB were present in almost equal numbers. In the lake sediments, a drastic decrease in microbial numbers with depth was revealed. SRB were found to prevail in the upper sediment layer and archaea in the lower one. This finding correlated with the measured rates of sulfate reduction and methanogenesis. В© Nauka/Interperiodica 2006.

Scopus
Держатели документа:
Winogradsky Institute of Microbiology, Russian Academy of Sciences, pr. 60-letiya Oktyabrya, 7/1, 117312 Moscow, Russian Federation
Institute of Biophysics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Limnological Research Center, Swiss Federal Institute for Environmental Sciences and Technology (EAWAG), Seestrasse, 79, CH-6047 Kastanienbaum, Switzerland : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Kallistova, A.Yu.; Kevbrina, M.V.; Pimenov, N.V.; Rusanov, I.I.; Rogozin, D.Yu.; Wehrli, B.; Nozhevnikova, A.N.

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A new scheme of lignin biosynthesis and the mechanism of its regulation of functional properties. / D. A. Semenov, N. E. Sudachkova, R. G. Khlebopros // Doklady. Biochemistry and biophysics. - 2002. - Vol. 382. - P50-52 . - ISSN 1607-6729
Кл.слова (ненормированные):
lignin -- peroxidase -- phenol derivative -- polymer -- article -- biosynthesis -- cell wall -- chemistry -- metabolism -- oxidation reduction reaction -- physiology -- plant -- Cell Wall -- Lignin -- Oxidation-Reduction -- Peroxidase -- Phenols -- Plants -- Polymers

Scopus
Держатели документа:
Institute of Biophysics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036 Russia. : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Semenov, D.A.; Sudachkova, N.E.; Khlebopros, R.G.

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Total peroxidase and catalase activity of luminous basidiomycetes Armillaria borealis and Neonothopanus nambi in comparison with the level of light emission [Text] / O. A. Mogil'naya [et al.] // Appl. Biochem. Microbiol. - 2015. - Vol. 51, Is. 4. - P419-424, DOI 10.1134/S0003683815040110. - Cited References:35. - The authors are grateful to N. V. Psurtseva (curator of the collection of basidiomycetes of the Botanical Institute, Russian Academy of Science) for help with the species affiliation of the IBSO 2328 culture. This work was supported by the Program of Interdisciplinary Projects of the Siberian Branch of the Russian Academy of Sciences, project no. 71. . - ISSN 0003-6838. - ISSN 1573-8183

РУБ Biotechnology & Applied Microbiology + Microbiology
Рубрики:
OXIDATIVE STRESS
   SYSTEM
   FUNGI
   BIOLUMINESCENCE
   LUMINESCENCE
Кл.слова (ненормированные):
basidiomycetes -- luminescence -- peroxidase -- catalase
Аннотация: The peroxidase and catalase activities in the mycelium of luminous basidiomycetes Armillaria borealis and Neonothopanus nambi in normal conditions and under stress were compared. An increase in the luminescence level was observed under stress, as well as an increase in peroxidase and catalase activities. Moreover, the peroxidase activity in extracts of A. borealis mycelium was found to be almost one and a half orders of magnitude lower, and the catalase activity more than two orders of magnitude higher in comparison with the N. nambi mycelium. It can be suggested that the difference between the brightly luminescent and dimly luminescent mycelium of N. nambi is due to the content of (HO2)-O-2 or other peroxide compounds.

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Держатели документа:
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Mogil'naya, O. A.; Ronzhin, N. O.; Medvedeva, S. E.; Bondar', V. S.; Siberian Branch of the Russian Academy of Sciences [71]

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Comparative evaluation of total peroxidase and catalase activities during light emission of luminous fungus Neonothopanus nambi / O. A. Mogilnaya, N. O. Ronzhin, V. S. Bondar // Mycosphere. - 2016. - Vol. 7, Is. 4. - P499-510, DOI 10.5943/mycosphere/7/4/9 . - ISSN 2077-7000
Кл.слова (ненормированные):
Basidiomycetes -- Hydrogen peroxide -- Luminescence -- Stress
Аннотация: Submerged cultivation of luminous fungus Neonothopanus nambi under orbital stirring causes formation of pellets with smooth or rough surfaces. The experiments showed that luminescence of the pellets washed in water increased considerably. Previous studies suggested possible participation of peroxidases in the light emitting reaction. In this study, oxidative azo coupling reaction accompanied by formation of chromogen was used to evaluate peroxidase activity in vivo, in brightly luminescent pellets and in pellets with low luminescence intensity (dim ones). Staining of the brightly luminescent pellets took a few minutes, and their staining intensity was several times higher than that of the dim pellets. From the results of in vivo experiments it was concluded that the bright pellets differed from the dim ones in the production of hydrogen peroxide, or, possibly, other peroxides. Measurements of total peroxidase and catalase activities in pellet extracts also showed an increase in enzyme activities along with an increase in luminescence intensity of native pellets. However, results of the in vitro experiments do not definitively suggest a direct relationship between luminescence and activity of these enzymes. We assume that luminescence of this fungal species may be an additional way to neutralize peroxide compounds under stress. © Guizhou Academy of Agricultural Sciences.

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

Доп.точки доступа:
Mogilnaya, O. A.; Ronzhin, N. O.; Bondar, V. S.

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Salinity modulates thermotolerance, energy metabolism and stress response in amphipods Gammarus lacustris / K. P. Vereshchagina [et al.] // PeerJ. - 2016. - Vol. 2016, Is. 11, DOI 10.7717/peerj.2657 . - ISSN 2167-8359
Кл.слова (ненормированные):
Adaptation -- Amphipoda -- Gammarus lacustris -- Salinity -- Thermal tolerance
Аннотация: Temperature and salinity are important abiotic factors for aquatic invertebrates. We investigated the influence of different salinity regimes on thermotolerance, energy metabolism and cellular stress defense mechanisms in amphipods Gammarus lacustris Sars from two populations. We exposed amphipods to different thermal scenarios and determined their survival as well as activity of major antioxidant enzymes (peroxidase, catalase, glutathione S-transferase) and parameters of energy metabolism (content of glucose, glycogen, ATP, ADP, AMP and lactate). Amphipods from a freshwater population were more sensitive to the thermal challenge, showing higher mortality during acute and gradual temperature change compared to their counterparts from a saline lake. A more thermotolerant population from a saline lake had high activity of antioxidant enzymes. The energy limitations of the freshwater population (indicated by low baseline glucose levels, downward shift of the critical temperature of aerobic metabolism and inability to maintain steady-state ATP levels during warming) was ob- served, possibly reflecting a trade-off between the energy demands for osmoregulation under the hypo-osmotic condition of a freshwater environment and protection against temperature stress. © 2016 Vereshchagina et al.

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Держатели документа:
Institute of Biology, Irkutsk State University, Irkutsk, Russian Federation
Baikal Research Centre, Irkutsk, Russian Federation
Institute of Biophysics SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Institute for Biological Sciences, University of Rostock, Rostock, Germany

Доп.точки доступа:
Vereshchagina, K. P.; Lubyaga, Y. A.; Shatilina, Z.; Bedulina, D.; Gurkov, A.; Axenov-Gribanov, D. V.; Baduev, B.; Kondrateva, E. S.; Gubanov, M.; Zadereev, E.; Sokolova, I.; Timofeyev, M.

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Morphological properties and levels of extracellular peroxidase activity and light emission of the basidiomycete Armillaria borealis treated with beta-glucosidase and chitinase / O. A. Mogilnaya [et al.] // Mycosphere. - 2017. - Vol. 8, Is. 4. - P649-+, DOI 10.5943/mycosphere/8/4/11. - Cited References:39. - This work was supported by the state budget allocated to the fundamental research at the Russian Academy of Sciences (project no. 0356-2016-0709) and Program No. II. 2 "Integration and Development" of the Siberian Branch of the Russian Academy of Sciences (project no. 0356-2015-0103). . - ISSN 2077-7000

РУБ Mycology
Рубрики:
FUNGAL CELL-WALL
OXIDATIVE STRESS
PHANEROCHAETE-CHRYSOSPORIUM
Кл.слова (ненормированные):
basidiomycetes -- bioluminescence -- cell wall -- beta-glucosidase -- chitinase -- peroxidase
Аннотация: The study estimates morphological properties and levels of extracellular peroxidase activity and light emission of mycelium of the basidiomycete Armillaria borealis IBSO 2328 treated with beta-glucosidase and chitinase. Mycelium incubated with the enzymes shows considerable morphological changes and indications of osmotic shock. Injuries observed in the cell envelope of the fungal hyphae are primarily attributed to the partial (in the beta-glucosidase treatment) or complete (in the chitinase treatment) disintegration of the melanin layer on the surface of the cell wall. Changes in the cell wall of hyphae are accompanied by release of extracellular peroxidases of the fungus into the incubation medium and an increase in light emission relative to the luminescence of the control pellets. We assume that higher level of luminescence of the enzyme-treated mycelium samples could be related to the disintegration of the surface pigment layer of the hyphae and the partial loss of extracellular peroxidases. The data obtained confirm the previously proposed hypothesis in which light producing reaction of the fungus may be an additional way to neutralize active oxygen radicals under stress.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Biophys, Fed Res Ctr Krasnoyarsk Sci Ctr SB RAS, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Mogilnaya, O. A.; Ronzhin, N. O.; Artemenko, K. S.; Bondar, V. S.; Russian Academy of Sciences [0356-2016-0709, 0356-2015-0103]

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Estimating levels of light emission and extracellular peroxidase activity of mycelium of luminous fungus Neonothopanus nambi treated with ?-glucosidase / O. A. Mogilnaya, N. O. Ronzhin, V. S. Bondar // Curr. Res. Environ. Appl. Mycol. J. Fungal. - 2018. - Vol. 8, Is. 1. - P75-85, DOI 10.5943/cream/8/1/6 . - ISSN 2229-2225
Кл.слова (ненормированные):
Basidiomycetes -- Cell wall -- Luminescence -- Polysaccharide sheath
Аннотация: The present study estimates the level of extracellular peroxidase activity and light emission intensity of mycelium of luminescent basidiomycete Neonothopanus nambi treated with ?-glucosidase. A hypothesis has been proposed that treatment with ?-glucosidase may trigger biochemical mechanisms of activation of ROS (primarily hydrogen peroxide) generation in N. nambi mycelium. The results obtained indicate that the enzyme causes partial disintegration of the slimy sheath of fungal hyphae and intracellular matrix, which leads to release of the extracellular peroxidases to the incubation medium. Mycelial cells treated with the enzyme reach the peak of their luminescence sooner. It has been assumed that partial loss of extracellular peroxidases, as important enzymes of antioxidant defense, may be compensated for by an increase in the level of light emission by the fungus. © 2018 Beijing Academy of Agriculture and Forestry Sciences.

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Держатели документа:
Institute of Biophysics, Siberian Branch of Russian Academy of Science, Federal Research Center Krasnoyarsk Science Center SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Mogilnaya, O. A.; Ronzhin, N. O.; Bondar, V. S.

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Nanodiamonds as an effective adsorbent for immobilization of extracellular peroxidases from luminous fungus Neonothopanus nambi to construct a phenol detection system / O. Mogilnaya [et al.] // Biocatal. Biotransform. - 2019. - Vol. 37, Is. 2. - P97-105, DOI 10.1080/10242422.2018.1472586. - Cited References:50. - This work was supported by the state budget allocated to the fundamental research at the Russian Academy of Sciences [project no. 0356-2016-0709]. . - ISSN 1024-2422. - ISSN 1029-2446

РУБ Biochemistry & Molecular Biology + Biotechnology & Applied Microbiology
Рубрики:
CARBON NANOTUBES
   ARMILLARIA-BOREALIS
   LIGHT-EMISSION
   DEGRADATION
Кл.слова (ненормированные):
Nanodiamonds -- immobilization -- luminous fungus -- beta-glucosidase -- peroxidase -- indicator system
Аннотация: Modified nanodiamonds (MNDs) produced by detonation synthesis can be used as an effective adsorbent to immobilize extracellular peroxidases of the luminous basidiomycete Neonothopanus nambi. The enzymes are firmly immobilized on MND particles and exhibit catalytic activity. The indicator system (the MND-enzyme complex) reused many times retains its ability to catalyze reaction of co-oxidation of phenol and 4-aminoantipirine in the presence of hydrogen peroxide and remains functionally active during long-term storage (for 1 month or longer) in aqueous suspensions at 4 degrees C. MNDs and enzymes of higher fungi can be effectively used to construct new reusable indicator systems for analytical applications such as monitoring contamination of aquatic environments by phenolic compounds.

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

Доп.точки доступа:
Mogilnaya, Olga; Ronzhin, Nikita; Artemenko, Karina; Bondar, Vladimir; Russian Academy of Sciences [0356-2016-0709]

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Extracellular peroxidase activity and light emission of the mycelium of the basidiomycete neonothopanus nambi in the presence of ?-glucosidase / O. A. Mogilnaya, N. O. Ronzhin, V. S. Bondar // Biophysics. - 2018. - Vol. 63, Is. 1. - P93-99, DOI 10.1134/S0006350918010104 . - ISSN 0006-3509
Кл.слова (ненормированные):
Basidiomycetes -- Cell wall -- Luminescence -- Peroxidase -- ?-glucosidase
Аннотация: A comparative evaluation of the level of extracellular peroxidase activity and light-emission intensity of the mycelium of the luminescent basidiomycete Neonothopanus nambi in the presence of ?-glucosidase was performed. The enzyme activity damages the hyphae of the fungus leading to osmotic imbalance, partial degradation of the mycelium, and release of extracellular peroxidases into the incubation medium. The presence of ?-glucosidase reduces the time necessary to reach the maximum luminescence. Putative biochemical mechanisms that underlie the stimulation of reactive oxygen species formation (first and foremost, of hydrogen peroxide) in the N. nambi mycelium in the presence of ?-glucosidase are proposed. © O.A. Mogilnaya, N.O. Ronzhin, V.S. Bondar and Pleiades Publishing, Inc., 2018.

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Держатели документа:
Institute of Biophysics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Mogilnaya, O. A.; Ronzhin, N. O.; Bondar, V. S.

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10.

Extracellular Oxidases of Basidiomycete Neonothopanus nambi: Isolation and Some Properties / N. O. Ronzhin, O. A. Mogilnaya, K. S. Artemenko [et al.] // Dokl. Biochem. Biophys. - 2020. - Vol. 490, Is. 1. - P38-42, DOI 10.1134/S1607672920010135. - Cited References:15 . - ISSN 1607-6729. - ISSN 1608-3091

РУБ Biochemistry & Molecular Biology + Biophysics
Рубрики:
PEROXIDASE-ACTIVITY
LIGHT-EMISSION
Кл.слова (ненормированные):
extracellular oxidases -- basidiomycete Neonothopanus nambi -- beta-glucosidase -- gel-filtration chromatography -- veratryl alcohol -- phenol -- FAD
Аннотация: Using the original technique of treating biomass with beta-glucosidase, a pool of extracellular fungal enzymes was obtained for the first time from the mycelium of basidiomycete Neonothopanus nambi. Two protein fractions containing enzymes with oxidase activity were isolated from the extract by gel-filtration chromatography and conventionally called F1 and F2. Enzyme F1 has a native molecular weight of 80-85 kDa and does not contain chromophore components; however, it catalyzes the oxidation of veratryl alcohol with K-m = 0.52 mM. Probably, this enzyme is an alcohol oxidase. Enzyme F2 with a native molecular weight of approximately 60 kDa is a FAD-containing protein. It catalyzes the cooxidation of phenol with 4-aminoantipyrine without the addition of exogenous hydrogen peroxide, which distinguishes it from the known peroxidases. It was assumed that this enzyme may be a mixed-function oxidase. F2 oxidase has K-m value 0.27 mM for phenol. The temperature optimums for oxidases F1 and F2 are 22-35 and 55-70 degrees C, and pH optimums are 6 and 5, respectively.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci, Inst Biophys,Fed Res Ctr, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Ronzhin, N. O.; Mogilnaya, O. A.; Artemenko, K. S.; Posokhina, E. D.; Bondar, V. S.

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