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Published byAdi Gunawan Modified over 6 years ago
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Fatty Acid Oxidation Title slide - fatty acid oxidation, beta oxidation
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The Knoop experiment that proved beta oxidation
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Fatty acid must be activated in an ATP-dependent reaction
Fatty acid must be activated in an ATP-dependent reaction. An acyladenylate is formed as an intermediate - anhydride between the fatty acid and AMP. This is a two step reaction; the activated acyl group from the acyl adenylate is transferred to CoA.
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Carnithine is required for the transport of the acyl group into the mitochondria where beta oxidation occurs.
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The carrier is located in the membrane and vectorially transports the acyl group.
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The reaction sequence in fatty acid oxidation - one cycle; this is repeated and two carbons are removed at a time.
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The first reaction is catalyzed by acyl~CoA dehydrogenase, a flavin-depedent enzyme.
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Further steps
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In the second reaction the dienoylCoA is reduced using NADPH.
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Thiolase transfers to a C-two unit to CoA
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Ketone body - acetoacetate is reduced to beta-hydroxdybutyrate.
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Hypoglcin inhibits the acyl~CoA dehydrogenase that ties up the FAD.
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Reaction mechanism
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How to handle complications
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