Reference: Bucovaz ET, et al. (1980) Coenzyme A-synthesizing protein complex of Saccharomyces cerevisiae. Mol Cell Biochem 30(1):7-26

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Abstract


The coenzyme A-synthesizing protein complex (CoA-SPC) is a multienzyme complex of Saccharomyces cerevisiae (Bakers' yeast), which has a molecular weight in excess of 200,000 as determined by Sephadex G-200 column chromatography. This multienzyme complex, which is insoluble in the crude yeast cell lysate, has been purified 229-fold. A cellular component of the yeast cell lysate, referred to as t-Factor, with a molecular weight of 400-1000 and chloride ion are involved in the solubilization of CoA-SPC. The CoA-SPC requires L-cysteine, D-pantothenic acid and ATP as substrates. The terminal CoA-SPC-bound intermediate is dephospho-CoA, which is subsequently phosphorylated and released from the complex as CoA. The sequence of reactions for the synthesis of CoA by the CoA-SPC differs significantly from those previously proposed for other systems. It could be that the reaction sequence is unique for the yeast cell.

Reference Type
Journal Article
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Bucovaz ET, Tarnowski SJ, Morrison WC, Macleod RM, Morrison JC, Sobhy CM, Rhoades JL, Fryer JE, Wakim JM, Whybrew WD
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