Immunochemical identification of branched-chain 2-oxo acid dehydrogenase kinase. 1991

Y Shimomura, and N Nanaumi, and M Suzuki, and R A Harris
Laboratory of Biochemistry of Exercise and Nutrition, University of Tsukuba, Ibaraki, Japan.

Branched-chain 2-oxo acid dehydrogenase kinase was characterized using anti-kinase polyclonal antibodies. The antibodies were purified from rabbit antiserum by an epitope selection method. The antibodies bound only to a 44 kDa polypeptide in the dehydrogenase-kinase complex and inhibited the kinase activity, substantiating that the 44 kDa polypeptide is the catalytic subunit of the kinase. The purified liver dehydrogenase-kinase complex, but not either the purified heart complex or the partially purified liver complex, contained 2 additional polypeptides of lower molecular weight which also reacted with the anti-kinase antibodies, suggesting that the liver kinase is subject to proteolytic degradation during purification.

UI MeSH Term Description Entries
D007658 Ketone Oxidoreductases Oxidoreductases that are specific for KETONES. Oxidoreductases, Ketone
D008099 Liver A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances. Livers
D009097 Multienzyme Complexes Systems of enzymes which function sequentially by catalyzing consecutive reactions linked by common metabolic intermediates. They may involve simply a transfer of water molecules or hydrogen atoms and may be associated with large supramolecular structures such as MITOCHONDRIA or RIBOSOMES. Complexes, Multienzyme
D009206 Myocardium The muscle tissue of the HEART. It is composed of striated, involuntary muscle cells (MYOCYTES, CARDIAC) connected to form the contractile pump to generate blood flow. Muscle, Cardiac,Muscle, Heart,Cardiac Muscle,Myocardia,Cardiac Muscles,Heart Muscle,Heart Muscles,Muscles, Cardiac,Muscles, Heart
D011494 Protein Kinases A family of enzymes that catalyze the conversion of ATP and a protein to ADP and a phosphoprotein. Protein Kinase,Kinase, Protein,Kinases, Protein
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000911 Antibodies, Monoclonal Antibodies produced by a single clone of cells. Monoclonal Antibodies,Monoclonal Antibody,Antibody, Monoclonal
D015153 Blotting, Western Identification of proteins or peptides that have been electrophoretically separated by blot transferring from the electrophoresis gel to strips of nitrocellulose paper, followed by labeling with antibody probes. Immunoblotting, Western,Western Blotting,Western Immunoblotting,Blot, Western,Immunoblot, Western,Western Blot,Western Immunoblot,Blots, Western,Blottings, Western,Immunoblots, Western,Immunoblottings, Western,Western Blots,Western Blottings,Western Immunoblots,Western Immunoblottings
D042942 3-Methyl-2-Oxobutanoate Dehydrogenase (Lipoamide) A ketone oxidoreductase that catalyzes the overall conversion of alpha-keto acids to ACYL-CoA and CO2. The enzyme requires THIAMINE DIPHOSPHATE as a cofactor. Defects in genes that code for subunits of the enzyme are a cause of MAPLE SYRUP URINE DISEASE. The enzyme was formerly classified as EC 1.2.4.3. 2-Oxoisovalerate Dehydrogenase (Lipoamide),2-Oxoisocaproate Dehydrogenase,Alpha-Keto Acid Dehydrogenase,BCKA Decarboxylase,Branched Chain Alpha-Keto Acid Decarboxylase,Branched Chain Ketoacid Dehydrogenase,Branched-Chain 2-Oxo Acid Dehydrogenase,Branched-Chain Keto Acid Dehydrogenase,Branched-Chain Oxo-Acid Dehydrogenase,2 Oxoisocaproate Dehydrogenase,Acid Dehydrogenase, Alpha-Keto,Alpha Keto Acid Dehydrogenase,Branched Chain 2 Oxo Acid Dehydrogenase,Branched Chain Alpha Keto Acid Decarboxylase,Branched Chain Keto Acid Dehydrogenase,Branched Chain Oxo Acid Dehydrogenase,Decarboxylase, BCKA,Dehydrogenase, 2-Oxoisocaproate,Dehydrogenase, Alpha-Keto Acid,Dehydrogenase, Branched-Chain Oxo-Acid,Oxo-Acid Dehydrogenase, Branched-Chain
D051381 Rats The common name for the genus Rattus. Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus

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