BCM 475 Chapter Notes - Chapter 22: Malonyl-Coa, Malate Dehydrogenase, Acyl Carrier Protein

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18 Dec 2016
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Acetyl coa formed from pyruvate in mitochondria fatty acid synthesis in cytoplasm. Citrate + atp + coa + h2o = acetyl coa + adp + p + oxaloacetate. Transporter = citrate: carries acetyl groups across inner mitochondrial membrane. Steps: mitochondria: acetyl coa + oxaloacetate citrate, passes through inner mitochondria membrane, cytoplasm: citrate cleaved on other side, atp-citrate lyase. Nadp+ + nadh + atp + h2o = nadph + nad+ + adp + p + h. Steps: cytoplasm: oxaloacetate reduction by nadh | oxaloacetate + nadh + h malate + nad, catalyzed by malate dehydrogenase, oxidative decarboxylation | malate + nadp+ pyruvate + co2 + nadph, catalyzed by nadp+-linked malate enzyme/malic enzyme. 8 nadph formed from 8 acetyl coa in palmitate synthesis. Pentose phosphate pathway: pyruvate enters mitochondria, pyruvate carboxylation | pyruvate + co2 + atp + h2o oxaloacetate + adp + p + 2h, catalyzed by pyruvate carboxylase.

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