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  • Branched Fatty Acid Esters of Hydroxy Fatty Acids Are Preferred Substrates of the MODY8 Protein Carboxyl Ester Lipase.

Branched Fatty Acid Esters of Hydroxy Fatty Acids Are Preferred Substrates of the MODY8 Protein Carboxyl Ester Lipase.

Biochemistry (2016-08-11)
Matthew J Kolar, Siddhesh S Kamat, William H Parsons, Edwin A Homan, Tim Maher, Odile D Peroni, Ismail Syed, Karianne Fjeld, Anders Molven, Barbara B Kahn, Benjamin F Cravatt, Alan Saghatelian
ABSTRACT

A recently discovered class of endogenous mammalian lipids, branched fatty acid esters of hydroxy fatty acids (FAHFAs), possesses anti-diabetic and anti-inflammatory activities. Here, we identified and validated carboxyl ester lipase (CEL), a pancreatic enzyme hydrolyzing cholesteryl esters and other dietary lipids, as a FAHFA hydrolase. Variants of CEL have been linked to maturity-onset diabetes of the young, type 8 (MODY8), and to chronic pancreatitis. We tested the FAHFA hydrolysis activity of the CEL MODY8 variant and found a modest increase in activity as compared with that of the normal enzyme. Together, the data suggest that CEL might break down dietary FAHFAs.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
L-Methionine methyl ester hydrochloride, 98%
Sigma-Aldrich
Graphene nanoplatelets, 15 μm particle size
Avanti
5-PAHSA-d9, Avanti Research - A Croda Brand 860410C
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9-PAHSA-d9, Avanti Research - A Croda Brand 860409C
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9-PAHSA, Avanti Research - A Croda Brand 900409C
Avanti
5-PAHSA, 5-(palmitoyloxy)octadecanoic acid, chloroform