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  • Title: Interaction of ATP with acetyl-CoA carboxylase from rat liver. The role of the polyphosphate chain. Affinity labelling with alkylating amides of ATP and ADP.
    Author: Rabinkov AG, Amontov SV, Buneva VN, Tarussova NB.
    Journal: Biochimie; 1990 Oct; 72(10):719-24. PubMed ID: 1981847.
    Abstract:
    The interaction of a number of ATP analogs with a modified triphosphate moiety as well as 2-chloro-ethyl-amino derivatives of nucleotides, 4(N-2-chloroethyl-N-methylamino)-benzyl-gamma-amide of ATP and the corresponding ADP beta-amide with acetyl-CoA carboxylase (EC 6.4.1.2.) from rat liver has been studied. Halophosphonate derivatives of ATP have been synthesized from bromomethylene diphosphonic acid and found to be reversible inhibitors of the enzyme. ATP and ADP alkylating amides have proved to form a reversible complex with the ATP-binding site and to modify a group in the acetyl-CoA-binding site. The bicarbonate ion accelerates the process of inactivation. The estimate of the distance between the ATP-binding site and the acetyl-CoA-binding site ranges within 0.8-1.2 nm.
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