Pyruvate dehydrogenase complex and nicotinamide nucleotide transhydrogenase constitute an energy-consuming redox circuit
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چکیده
منابع مشابه
Energy-linked nicotinamide-nucleotide transhydrogenase. Characterization of reconstituted ATP-driven transhydrogenase from beef heart mitochondria.
The interaction between pure transhydrogenase and ATPase (Complex V) from beef heart mitochondria was investigated with transhydrogenase-ATPase vesicles in which the two proteins were co-reconstituted by dialysis or dilution procedures. In addition to phosphatidylcholine and phosphatidylethanolamine, reconstitution required phosphatidylserine and lysophosphatidylcholine. Transhydrogenase-ATPase...
متن کاملPhysiological roles of nicotinamide nucleotide transhydrogenase.
From the foregoing considerations, the energy-linked transhydrogenase reaction emerges as a powerful and flexible element in the network of redox and energy interrelationships that integrate mitochondrial and cytosolic metabolism. Its thermodynamic features make it possible for the reaction to respond readily to challenges, either on the side of NADPH utilization or on the side of energy deplet...
متن کاملMitochondrial energy-transducing nicotinamide nucleotide transhydrogenase. Purification and properties of the proteinase K-bisected enzyme.
The mitochondrial proton-translocating nicotinamide nucleotide transhydrogenase is embedded in the inner membrane as a homodimer of monomer Mr = 109,288. Its N-terminal 430 residues and C-terminal 200 residues protrude into the matrix, whereas its central 400 residues appear to intercalate into the inner membrane as 14 hydrophobic clusters of about 20 residues each (Yamaguchi, M., and Hatefi, Y...
متن کاملCell-free translation of mitochondrial nicotinamide nucleotide transhydrogenase.
Mammalian nicotinamide nucleotide transhydrogenase is translated as a 5000 daltons larger molecular weight precursor in a cell-free system programmed with rat liver polysomes. The mature rat liver enzyme had the same molecular weight as the purified beef heart enzyme, 115 000 daltons. The precursor was not processed in vitro by liver mitochondria or by a rat liver mitochondrial matrix fraction,...
متن کاملProton-Translocating Nicotinamide Nucleotide Transhydrogenase: A Structural Perspective
Nicotinamide nucleotide transhydrogenase (TH) is an enzyme complex in animal mitochondria and bacteria that utilizes the electrochemical proton gradient across membranes to drive the production of NADPH. The enzyme plays an important role in maintaining the redox balance of cells with implications in aging and a number of human diseases. TH exists as a homodimer with each protomer containing a ...
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ژورنال
عنوان ژورنال: Biochemical Journal
سال: 2015
ISSN: 0264-6021,1470-8728
DOI: 10.1042/bj20141447