Oxaloacetate: Difference between revisions
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Oxaloacetate is a key component in the [[Citric Acid Cycle|citric acid cycle]], [[Gluconeogenesis|gluconeogenesis]] and in the biosynthesis of other biological molecules, such as | Oxaloacetate is a key component in the [[Citric Acid Cycle|citric acid cycle]], [[Gluconeogenesis|gluconeogenesis]] and in the [[Biosynthesis|biosynthesis]] of other biological [[Molecules|molecules]], such as [[Aspartate|aspartate]] and other [[Amino acids|amino acids]], [[Purines|purines]] and [[Pyrimidine|pyrimidines]]. <br> | ||
<br> | In the [[Citric acid cycle|citric acid cycle]], oxaloacetate (a 4 [[Carbon|carbon]] molecule) is combined with [[Acetyl-CoA|acetyl CoA]] (a 2 carbon molecule) to generate the 6 carbon molecule citric acid. Acetyl CoA is generated from the oxidation of [[Pyruvate|pyruvate]] (which also generates [[Carbon_dioxide|CO<sub>2</sub>]]), and from the [[Oxidation|oxidation]] of [[Fatty acids|fatty acids]]. In the eigth and last step of the citric acid cycle, oxaloacetate is regenerated from malate by [[Malate dehydrogenase|malate dehydrogenase]] so it can once again combine with acetyl CoA and keep the cycle going <ref name="Alberts et al.">Alberts et al. Molecular Biology of the Cell (2008) 5th edition, Garland Science</ref>.<br> | ||
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Latest revision as of 15:51, 18 October 2016
Oxaloacetate is a key component in the citric acid cycle, gluconeogenesis and in the biosynthesis of other biological molecules, such as aspartate and other amino acids, purines and pyrimidines.
In the citric acid cycle, oxaloacetate (a 4 carbon molecule) is combined with acetyl CoA (a 2 carbon molecule) to generate the 6 carbon molecule citric acid. Acetyl CoA is generated from the oxidation of pyruvate (which also generates CO2), and from the oxidation of fatty acids. In the eigth and last step of the citric acid cycle, oxaloacetate is regenerated from malate by malate dehydrogenase so it can once again combine with acetyl CoA and keep the cycle going [1].
References
- ↑ Alberts et al. Molecular Biology of the Cell (2008) 5th edition, Garland Science