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Gene Cloning of an Efficiency Oleate Hydratase From Stenotrophomonas nitritireducens for Polyunsaturated Fatty Acids and its Application in the Conversion of Plant Oils to 10-Hydroxy Fatty Acids

Title
Gene Cloning of an Efficiency Oleate Hydratase From Stenotrophomonas nitritireducens for Polyunsaturated Fatty Acids and its Application in the Conversion of Plant Oils to 10-Hydroxy Fatty Acids
Authors
Kang, Woo-RiSeo, Min-JuShin, Kyung-ChulPark, Jin-ByungOh, Deok-Kun
Ewha Authors
박진병
SCOPUS Author ID
박진병scopus
Issue Date
2017
Journal Title
BIOTECHNOLOGY AND BIOENGINEERING
ISSN
0006-3592JCR Link1097-0290JCR Link
Citation
vol. 114, no. 1, pp. 74 - 82
Keywords
gene cloning10-hydroxy fatty acidoleate hydrataseplant oilspolyunsaturated fatty acidStenotrophomonas nitritireducens
Publisher
WILEY-BLACKWELL
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Hydroxy fatty acids are used as precursors of lactones and dicarboxylic acids, as starting materials of polymers, and as additives in coatings and paintings. Stenotrophomonas nitritireducens efficiently converts cis-9 polyunsaturated fatty acids (PUFAs) to 10-hydroxy fatty acids. However, gene encoding enzyme involved in this conversion has not been identified to date. We purified a putative fatty acid double-bond hydratase from S. nitritireducens by ultrafiltration and HiPrep DEAE FF and Resource Q ion exchange chromatographies. Peptide sequences of the purified enzyme were obtained by liquid chromatography-mass spectrometry/mass spectrometry (LC-MS/MS) analysis. Sequence of the partial gene encoding this putative fatty acid double-bond hydratase was determined by degenerate polymerase chain reaction (PCR) based on the peptide sequences. The remaining gene sequence was identified by rapid amplification of cDNA ends using cDNA of S. nitritireducens as a template, and the full-length gene was cloned subsequently. The expressed enzyme was identified as an oleate hydratase by determining its kinetic parameters toward unsaturated fatty acids. S. nitritireducens oleate hydratase showed higher activity toward PUFAs compared with other available oleate hydratases. This suggested that the enzyme could be used effectively to convert plant oils to 10-hydroxy fatty acids because these oils contained unsaturated fatty acids such as oleic acid (OA) and linoleic acid (LA) and PUFAs such as a-linolenic acid and/or g-linolenic acid. The enzyme converted soybean oil and perilla seed oil hydrolyzates containing 10mM total unsaturated fatty acids, including OA, LA, and ALA, to 8.87 and 8.70mM total 10-hydroxy fatty acids, respectively, in 240 min. To our knowledge, this is the first study on the biotechnological conversion of PUFA-containing oils to hydroxy fatty acids. (C) 2016 Wiley Periodicals, Inc.
DOI
10.1002/bit.26058
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엘텍공과대학 > 식품공학전공 > Journal papers
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