Peroxisomal Citrate Synthase Provides Exit Route from Fatty Acid Metabolism in Oilseeds
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Peroxisomal Citrate Synthase Provides Exit Route from Fatty Acid Metabolism in Oilseeds
The seed of oilseed plants, including Arabidopsis and several crop species, such as soybean, sunflower, and canola, contain a major store of oil in the form of triacylglycerol (TAG), which provides carbon and energy for seed germination and seedling growth. During germination and seedling development, TAG stored in oil bodies is broken down into fatty acids through the action of lipases. Fatty ...
متن کاملArabidopsis peroxisomal citrate synthase is required for fatty acid respiration and seed germination.
We tested the hypothesis that peroxisomal citrate synthase (CSY) is required for carbon transfer from peroxisomes to mitochondria during respiration of triacylglycerol in Arabidopsis thaliana seedlings. Two genes encoding peroxisomal CSY are expressed in Arabidopsis seedlings, and seeds from plants with both CSY genes disrupted were dormant and did not metabolize triacylglycerol. Germination wa...
متن کاملPeroxisomal-microsomal communication in unsaturated fatty acid metabolism.
The addition of 1-acyl-sn-glycero-3-phosphocholine (1-acyl-GPC) to peroxisomes decreased the production of acid-soluble radioactivity formed by beta-oxidation of [1-(14)C]arachidonate due to substrate removal by esterification into the acceptor. This peroxisomal-associated acyl-CoA:1-acyl-GPC acyltransferase activity was due to microsomal contamination. The production of acid-soluble radioactiv...
متن کاملACBD5 deficiency causes a defect in peroxisomal very long-chain fatty acid metabolism.
BACKGROUND Acyl-CoA binding domain containing protein 5 (ACBD5) is a peroxisomal membrane protein with a cytosolic acyl-CoA binding domain. Because of its acyl-CoA binding domain, ACBD5 has been assumed to function as an intracellular carrier of acyl-CoA esters. In addition, a role for ACBD5 in pexophagy has been suggested. However, the precise role of ACBD5 in peroxisomal metabolism and/or fun...
متن کاملCitrate cleavage enzyme and fatty acid synthesis.
A series of experiments was performed to test the proposal of others that citrate cleavage enzyme (EC 4.1.3.8) regulates the rate of fatty acid synthesis in rat liver. The results show that, in recovery from fasting, fatty acid synthesis increased markedly without change in citrate cleavage enzyme activity. After the administration of alloxan, fatty acid synthesis decreased prior to any change ...
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ژورنال
عنوان ژورنال: The Plant Cell
سال: 2005
ISSN: 1040-4651,1532-298X
DOI: 10.1105/tpc.105.034843