期刊
FOOD RESEARCH INTERNATIONAL
卷 147, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.foodres.2021.110470
关键词
Lactobacillus plantarum; Linoleic acid metabolites; Linoleate isomerase; Acetoacetate decarboxylase; Dehydrogenase; In silico study
资金
- Natural Science Foundation of China [31871823]
- Beijing Talent Cultivation Quality Construction -Firstclass Professional Construction (Municipal Level) -Food Science and Engineering [PXM2019_014213_000010]
This study revealed that probiotic L. plantarum 12-3 can convert linoleic acid into various fatty acid derivatives, with in vitro studies confirming the enzymatic reactions responsible for this conversion. Putative candidate enzymes involved in the transformation were identified through whole-genome analysis, offering further insights into the mechanism of how beneficial fatty acid metabolites are produced in probiotic L. plantarum.
Lactic acid bacteria have been reported to be capable of converting polyunsaturated fatty acids, e.g. linoleic acid (LA) into bioactive and other fatty acid metabolites that are not toxic to the bacteria themselves, but the mechanism of this conversion is not clear. Here we reported for the first time that probiotic L. plantarum 12-3 derived from Tibet kefir when supplemented with LA from 1% to 10% in the MRS medium transformed LA to various fatty acid derivatives. These derivatives formed in the medium were identified with gas chromatography and mass spectrometry. In silico studies were done to confirm the enzymatic reactions responsible for this conversion. We found that L. plantarum 12-3 could convert LA at different concentrations to 8 different fatty acid derivatives. Putative candidate enzymes involved in biotransformation of LA into fatty acid derivatives were identified via whole genome of L. plantarum 12-3, including linoleate isomerase, acetoacetate decarboxylase and dehydrogenase. Therefore, the present study provides further understanding of the mechanism of conversion of LA to health-beneficial fatty acid metabolites in probiotic L. plantarum, which can be explored for potential application in functional foods.
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