Mitochondrial fatty acid transport system

The mitochondrial fatty acid transport system is a multi-component molecular machinery responsible for importing long-chain fatty acids from the cytosol into the mitochondrial matrix, where they undergo β‑oxidation to generate acetyl-CoA for energy production. This process is essential because long-chain acyl-CoAs cannot cross the inner mitochondrial membrane directly. The core components include: • Carnitine palmitoyltransferase 1 (CPT1) on the outer mitochondrial membrane catalyzes conversion of acyl-CoA to acylcarnitine. • Carnitine-acylcarnitine translocase transports acylcarnitines across the inner membrane. • Carnitine palmitoyltransferase 2 (CPT2) on the matrix side reconverts acylcarnitines back to acyl-CoAs for entry into β‑oxidation. This shuttle is tightly regulated by malonyl-CoA and modulated by changes in mitochondrial architecture that affect CPT1 activity and sensitivity. Disruption leads to severe metabolic diseases due to impaired energy production from fats. Drugs like etomoxir target this pathway by inhibiting CPT1, but such interventions carry risks due to its central role in metabolism. Plasma or urine levels of specific acylcarnitines serve as biomarkers for diagnosing related inherited disorders. Note: The term "Mitochondrial fatty acid transport system" refers collectively to a functional pathway rather than a single protein or receptor; it encompasses several enzymes and transporter proteins acting together. For structured data purposes, consider mapping queries about this "target" specifically onto its best-characterized protein components—most notably CPT1—or clarify if you require information at that level. If you need canonical forms for individual proteins within this system—such as "Carnitine palmitoyltransferase 1"—please specify further. Because "Mitochondrial fatty acid transport system" is not a single molecule but rather an integrated multi-protein process/pathway, set `is_incorrect` as true per your conventions.

Other names

Carnitine shuttleCarnitine-dependent mitochondrial fatty acid import systemMitochondrial carnitine transport systemFatty acid β-oxidation transport machinery

Inhibition of carnitine palmitoyltransferase 1 (CPT1) to block mitochondrial uptake and oxidation of long-chain fatty acids