Catalytic Properties of Lipase Entrapped as Lysates of Recombinant Strain-Producer rEscherichia coli/lip into Nanocarbon-in-Silica Composites in the Bioconversion of Triglycerides and Fatty Acids
- Authors: Perminova L.V.1, Kovalenko G.A.1,2, Beklemishev A.B.3, Mamaev A.L.3, Pykhtina M.B.3, Rudina N.A.1
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Affiliations:
- Boreskov Institute of Catalysis
- Novosibirsk State University
- Research Institute of Biochemistry
- Issue: Vol 54, No 1 (2018)
- Pages: 38-44
- Section: Article
- URL: https://journal-vniispk.ru/0003-6838/article/view/152401
- DOI: https://doi.org/10.1134/S000368381801009X
- ID: 152401
Cite item
Abstract
Composite multi-component biocatalysts were prepared by entrapping lysates of a recombinant rE. coli/lip strain producing Thermomyces lanuginosus lipase into composite nanocarbon-containing matrices based on a SiO2 xerogel. The dependence of the lipase activity and operational stability on the type of the carbon component (nanotubes or nanospheres of different diameters) was studied in the bioconversion of triglycerides (hydrolysis and interesterification), as well as in the esterification of saturated fatty acids—namely, butyric (C4:0), capric (C10:0), and stearic (C18:0) acids—with isoamyl alcohol. It was shown that the biocatalytic properties were determined by both the texture parameters of the nanostructured carbon included and the type of enzymatic reaction performed. Biocatalysts without a nanocarbon component had the highest operational stability in the batch process of interesterification of sunflower oil with ethyl acetate; the half-life time was found to be 720 h at 40°C. Biocatalysts containing carbon nanotubes of ~21 nm in diameter were five to six times more active in the batch esterification process than biocatalysts without a nanocarbon component. Biocatalysts containing carbon nanotubes catalyzed the synthesis of esters in a binary organic solvent (hexane and diethyl ether) without a loss of activity for more than 500 h at 40°C.
About the authors
L. V. Perminova
Boreskov Institute of Catalysis
Email: galina@catalysis.ru
Russian Federation, Novosibirsk, 630090
G. A. Kovalenko
Boreskov Institute of Catalysis; Novosibirsk State University
Author for correspondence.
Email: galina@catalysis.ru
Russian Federation, Novosibirsk, 630090; Novosibirsk, 630090
A. B. Beklemishev
Research Institute of Biochemistry
Email: galina@catalysis.ru
Russian Federation, Novosibirsk, 630117
A. L. Mamaev
Research Institute of Biochemistry
Email: galina@catalysis.ru
Russian Federation, Novosibirsk, 630117
M. B. Pykhtina
Research Institute of Biochemistry
Email: galina@catalysis.ru
Russian Federation, Novosibirsk, 630117
N. A. Rudina
Boreskov Institute of Catalysis
Email: galina@catalysis.ru
Russian Federation, Novosibirsk, 630090
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