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The second major step in the catabolism of the branched-chain amino acids, isoleucine, leucine, and valine, is irreversibly catalyzed by the branched-chain alpha-keto acid dehydrogenase complex (BCKD), an inner-mitochondrial enzyme complex composed of 3 catalytic components: a branched-chain alpha-keto acid decarboxylase (E1), a dihydrolipoyl transacylase (E2), and a dihydrolipoamide dehydrogenase (E3). The complex also contains 2 enzymes that regulated the state of activity of the BCKD complex: a kinase (BCKDK), and a phosphorylase. The ubiquitously expressed kinase contains 1 histidine kinase domain. Maple syrup urine disease (MSUD) is a pathology secondary to an enzyme defect in the catabolic pathway of leucine, isoleucine, and valine. Accumulation of these amino acids and their corresponding keto acids results in encephalopathy and progressive neurodegeneration in infants not treated for MSUD.
仅用于科研。不用于诊断过程。未经明确授权不得转售。
蛋白别名: [3-methyl-2-oxobutanoate dehydrogenase [lipoamide]] kinase, mitochondrial; BCKD-kinase; BCKDH kinase; BCKDHKIN; branched chain alpha-ketoacid dehydrogenase kinase; Branched-chain alpha-ketoacid dehydrogenase kinase; EC 2.7.11.4
基因别名: AI327402; BCKDK; BCKDKD; BDK
UniProt ID: (Human) O14874, (Rat) Q00972, (Mouse) O55028
Entrez Gene ID: (Human) 10295, (Rat) 29603, (Mouse) 12041