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A novel unsaturated fatty acid hydratase toward C16 to C22 fatty acids from Lactobacillus acidophilus. 2015

Akiko Hirata, and Shigenobu Kishino, and Si-Bum Park, and Michiki Takeuchi, and Nahoko Kitamura, and Jun Ogawa
Division of Applied Life Sciences Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan.

Hydroxy FAs, one of the gut microbial metabolites of PUFAs, have attracted much attention because of their various bioactivities. The purpose of this study was to identify lactic acid bacteria with the ability to convert linoleic acid (LA) to hydroxy FAs. A screening process revealed that a gut bacterium, Lactobacillus acidophilus NTV001, converts LA mainly into 13-hydroxy-cis-9-octadecenoic acid and resulted in the identification of the hydratase responsible, fatty acid hydratase 1 (FA-HY1). Recombinant FA-HY1 was purified, and its enzymatic characteristics were investigated. FA-HY1 could convert not only C18 PUFAs but also C20 and C22 PUFAs. C18 PUFAs with a cis carbon-carbon double bond at the Δ12 position were converted into the corresponding 13-hydroxy FAs. Arachidonic acid and DHA were converted into the corresponding 15-hydroxy FA and 14-hydroxy FA, respectively. To the best of our knowledge, this is the first report of a bacterial FA hydratase that can convert C20 and C22 PUFAs into the corresponding hydroxy FAs. These novel hydroxy FAs produced by using FA-HY1 should contribute to elucidating the bioactivities of hydroxy FAs.

UI MeSH Term Description Entries
D007700 Kinetics The rate dynamics in chemical or physical systems.
D007779 Lactobacillus acidophilus A species of gram-positive, rod-shaped bacteria isolated from the intestinal tract of humans and animals, the human mouth, and vagina. This organism produces the fermented product, acidophilus milk. Lactobacillus amylovorus
D003067 Coenzymes Small molecules that are required for the catalytic function of ENZYMES. Many VITAMINS are coenzymes. Coenzyme,Enzyme Cofactor,Cofactors, Enzyme,Enzyme Cofactors,Cofactor, Enzyme
D006867 Hydrolases Any member of the class of enzymes that catalyze the cleavage of the substrate and the addition of water to the resulting molecules, e.g., ESTERASES, glycosidases (GLYCOSIDE HYDROLASES), lipases, NUCLEOTIDASES, peptidases (PEPTIDE HYDROLASES), and phosphatases (PHOSPHORIC MONOESTER HYDROLASES). EC 3. Hydrolase
D013237 Stereoisomerism The phenomenon whereby compounds whose molecules have the same number and kind of atoms and the same atomic arrangement, but differ in their spatial relationships. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed) Molecular Stereochemistry,Stereoisomers,Stereochemistry, Molecular,Stereoisomer
D013379 Substrate Specificity A characteristic feature of enzyme activity in relation to the kind of substrate on which the enzyme or catalytic molecule reacts. Specificities, Substrate,Specificity, Substrate,Substrate Specificities
D014867 Water A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed) Hydrogen Oxide
D055162 Biocatalysis The facilitation of biochemical reactions with the aid of naturally occurring catalysts such as ENZYMES.
D019787 Linoleic Acid A doubly unsaturated fatty acid, occurring widely in plant glycosides. It is an essential fatty acid in mammalian nutrition and is used in the biosynthesis of prostaglandins and cell membranes. (From Stedman, 26th ed) 9,12-Octadecadienoic Acid,Linoleate,9-trans,12-trans-Octadecadienoic Acid,Linoelaidic Acid,Linoelaidic Acid, (E,Z)-Isomer,Linoleic Acid, (E,E)-Isomer,Linoleic Acid, (Z,E)-Isomer,Linoleic Acid, (Z,Z)-Isomer,Linoleic Acid, (Z,Z)-Isomer, 14C-Labeled,Linoleic Acid, Ammonium Salt, (Z,Z)-Isomer,Linoleic Acid, Calcium Salt, (Z,Z)-Isomer,Linoleic Acid, Potassium Salt, (Z,Z)-Isomer,Linoleic Acid, Sodium Salt, (E,E)-Isomer,Linoleic Acid, Sodium Salt, (Z,Z)-Isomer,Linolelaidic Acid,cis,cis-9,12-Octadecadienoic Acid,trans,trans-9,12-Octadecadienoic Acid,9 trans,12 trans Octadecadienoic Acid,9,12 Octadecadienoic Acid,Acid, 9,12-Octadecadienoic

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