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Autotrophic synthesis of polyhydroxyalkanoates by the bacteria Ralstonia eutropha in the presence of carbon monoxide / T. G. Volova, G. S. Kalacheva, O. V. Altukhova // Applied Microbiology and Biotechnology. - 2002. - Vol. 58, Is. 5. - P675-678, DOI 10.1007/s00253-002-0941-8 . - ISSN 0175-7598
Кл.слова (ненормированные):
3 hydroxybutyric acid -- acetoacetyl coenzyme a reductase -- acetyl coenzyme A acyltransferase -- beta hydroxyvalerate -- butyrate dehydrogenase -- carbon monoxide -- electrolyte -- hydrogen -- oxidoreductase -- poly(3 hydroxybutyric acid) -- poly(3 hydroxybutyric acid)synthase -- polyhydroxyalkanoic acid -- polymer -- unclassified drug -- valeric acid -- bacterium -- article -- autotrophy -- bacterial growth -- bacterial strain -- biomass production -- controlled study -- crystallization -- enzyme activity -- molecular weight -- nonhuman -- synthesis -- temperature -- Wautersia eutropha -- Carbon Monoxide -- Culture Media -- Cupriavidus necator -- Fatty Acids -- Lipids -- Polyesters -- Bacteria (microorganisms) -- Negibacteria -- Ralstonia -- Wautersia eutropha
Аннотация: It has been found that the carbon monoxide (CO)-resistant strain of the hydrogen bacteria Ralstonia eutropha B5786 is able to synthesise polyhydroxy-alkanoates (PHAs) in the presence of CO under autotrophic conditions. This strain, grown on model gas mixtures containing 5-25% CO (v/v), accumulates up to 70-75% (of absolutely dry matter) PHA, without significant variation in the yield coefficient on hydrogen. No suppression of the activities of the key enzymes of PHA synthesis (?-ketothiolase, acetoacetyl-CoA-reductase, butyrate dehydrogenase and poly-3-hydroxybutyrate synthase) was recorded. The PHA synthesised is a copolymer containing mostly ?-hydroxybutyrate (more than 99 mol%) with trace amounts of ?-hydroxyvalerate. The investigated properties of the polymer (molecular weight, crystallinity, temperature characteristics) do not differ from those of the polymer synthesised on electrolytic hydrogen.

Scopus
Держатели документа:
Institute of Biophysics, Siberian Br. Russian Academy of Sci., 660036 Krasnoyarsk, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Volova, T.G.; Kalacheva, G.S.; Altukhova, O.V.

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Autotrophic synthesis of polyhydroxyalkanoates by the bacteria Ralstonia eutropha in the presence of carbon monoxide [Text] / T. G. Volova, G. S. Kalacheva, O. V. Altukhova // Appl. Microbiol. Biotechnol. - 2002. - Vol. 58, Is. 5. - P. 675-678, DOI 10.1007/s00253-002-0941-8. - Cited References: 35 . - ISSN 0175-7598

РУБ Biotechnology & Applied Microbiology
Рубрики:
PSEUDOMONAS-OLEOVORANS
   ALCALIGENES-EUTROPHUS
   COAL
   CULTIVATION
   METABOLISM
   SUBSTRATE
   CULTURE
   CO2
   H-2
   O-2
Аннотация: It has been found that the carbon monoxide (CO)-resistant strain of the hydrogen bacteria Ralstonia eutropha B5786 is able to synthesise polyhydroxyalkanoates (PHAs) in the presence of CO under autotrophic conditions. This strain, grown on model gas mixtures containing 5-25% CO v/v), accumulates up to 70-75% (of absolutely dry matter) PHA, without significant variation in the yield coefficient on hydrogen. No suppression of the activities of the key enzymes of PHA synthesis (beta-ketothiolase, acetoacetyl-CoA-reductase, butyrate dehydrogenase and poly-3-hydroxybutyrate synthase) was recorded. The PHA synthesised is a copolymer containing mostly beta-hydroxybutyrate (more than 99 mol%) with trace amounts of beta-hydroxyvalerate. The investigated properties of the polymer (molecular weight, crystallinity, temperature characteristics) do not differ from those of the polymer synthesised on electrolytic hydrogen.

WOS
Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Biophys, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Volova, T.G.; Kalacheva, G.S.; Altukhova, O.V.

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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.

Scopus
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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