Section 43
Chapter 42,469

Catalytic properties of the ATPase on submitochondrial particles after exchange of tightly bound nucleotides under different steady state conditions

Myers, J.A.; Boyer, P.D.

Febs Letters 162(2): 277-281


ISSN/ISBN: 0014-5793
PMID: 6226536
DOI: 10.1016/0014-5793(83)80771-6
Accession: 042468090

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Energized submitochondrial particles were subjected to high or low [3H]ATP/[3H]ADP ratios, maintained during steady state by a pyruvate kinase or hexokinase regenerating system, respectively. Under both steady state conditions, about 1.4 mol [3H]nucleotide/mol ATPase was retained but considerably more [3H]ATP was retained with the high [3H]ATP/[3H]ADP ratio. The ATPase activity and the oxygen exchange of these differentially labeled SMP were the same, suggesting a lack of control function of non-catalytic tightly bound nucleotides.

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