Difference between revisions of "Tricarboxylic acid cycle"
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{{MitoPedia | {{MitoPedia | ||
|abbr=TCA cycle | |abbr=TCA cycle | ||
|description=The '''tricarboxylic acid (TCA) cycle''' is a system of enzymes in the mitochondrial matrix arranged in a cyclic metabolic structure, including dehydrogenases that converge in the NADH pool and [[succinate dehydrogenase]] (on the inner side of the inner mt-membrane) for entry into the membrane-bound | |description=The '''tricarboxylic acid (TCA) cycle''' is a system of enzymes in the mitochondrial matrix arranged in a cyclic metabolic structure, including dehydrogenases that converge in the NADH pool and [[succinate dehydrogenase]] (on the inner side of the inner mt-membrane) for entry into the membrane-bound ET-pathway [[mETS]]. [[Citrate synthase]] is a marker enzyme of the TCA cycle, at the gateway into the cycle from [[pyruvate]] via [[acteyl-CoA]]. It is thus the major module of the [[ETS]], upstream of the inner [[membrane-bound ETS|membrane-bound ET-pathway]] (mETS) and downstream of the [[outer mt-membrane]]. Sections of TCA cycle are required for [[fatty acid oxidation]] (FAO, Ξ²-oxidation). [[Anaplerotic reactions]] fuel the TCA cycle with other intermediary metabolites. In the cell, the TCA cycle serves also biosynthetic functions by metabolite export from the matrix into the cytosol. | ||
|info=[[Gnaiger 2014 MitoPathways]] | |info=[[Gnaiger 2014 MitoPathways]] | ||
|type=Enzyme | |type=Enzyme |
Revision as of 15:40, 16 October 2017
Description
The tricarboxylic acid (TCA) cycle is a system of enzymes in the mitochondrial matrix arranged in a cyclic metabolic structure, including dehydrogenases that converge in the NADH pool and succinate dehydrogenase (on the inner side of the inner mt-membrane) for entry into the membrane-bound ET-pathway mETS. Citrate synthase is a marker enzyme of the TCA cycle, at the gateway into the cycle from pyruvate via acteyl-CoA. It is thus the major module of the ETS, upstream of the inner membrane-bound ET-pathway (mETS) and downstream of the outer mt-membrane. Sections of TCA cycle are required for fatty acid oxidation (FAO, Ξ²-oxidation). Anaplerotic reactions fuel the TCA cycle with other intermediary metabolites. In the cell, the TCA cycle serves also biosynthetic functions by metabolite export from the matrix into the cytosol.
Abbreviation: TCA cycle
Reference: Gnaiger 2014 MitoPathways