Article
The hydrogen bonds between Arg423 and Glu472 and other key residues, Asp443, Ser477, and Pro489, are responsible for the formation and a different positioning of TNP-ATP and ATP within the nucleotide-binding site of Na(+)/K(+)-ATPase.
Biochemistry - 6 Jul 2004
Lánský Zdenek, Kubala Martin, Ettrich Rüdiger, Kutý Michal, Plásek Jaromír, Teisinger Jan, Schoner Wilhelm, Amler Evzen
Abstract excerpt
Mutation of Arg(423) at the N-domain of Na(+)/K(+)-ATPase resulted in a large decrease of both TNP-ATP and ATP binding. Thus, this residue, localized outside the binding pocket, seems to play a key role in supporting the proper structure and shape of the binding site. In addition, mutation of Glu(472) also caused a large decrease of both TNP-ATP and ATP binding. On the basis of our computer model, we hypothesized...
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