How Exactly Does the Pathway Affect Fatty Acid Oxidation?


Figure 13: Malonyl CoA inhibits the entry of fatty acids into the mitochondria, and thus inhibits fatty acid oxidation.
Fatty Acids are carried to the tissues by lipoproteins. There, they are activated and transported into the inner mitochondrial membrane to undergo beta-oxidation. The proteins that allow transport of fatty acids into the membrane are carnitine acyltransferases. Malonyl CoA, a component of lipid biosynthesis, as well as an integral part of the new pathway, is a potent inhibitor of carnitine acyltransferase I.

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Department of Biochemistry and Molecular Biophysics
krclark@u.arizona.edu