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  • Title: [Cooperative inactivation of glutamate dehydrogenase of 2,2,6,6- tetramethyl-4-oxopiperidine-1-oxyl. Interpretation of results within the scope of a hexamer model with equivalent subunit orientation].
    Author: Karabashian LV, Agadzhanian SA.
    Journal: Mol Biol (Mosk); 1988; 22(6):1539-44. PubMed ID: 3252150.
    Abstract:
    It was shown that the blockage of epsilon-amino group of Lis-126 residue by 2,2,6,6-tetramethyl-4-oxo-piperidine-1-oxyl (TMPO) leads to the cooperative inactivation of glutamate dehydrogenase (L-glutamate-NAD(P)-oxidoreductase, EC 1.4.1.3). The data concerning cooperative inactivation of the enzyme are interpreted by the model of hexamer with identical orientation of subunits. It was shown that the modification of any of enzyme subunits is accompanied by an inactivation of the hexamer's fragment which is a dimer, with subunits interacting reciprocally by means of isological contacts.
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