Dooley MJ, Kono M, Suzuki F. Theoretical structure-activity studies of adenosine A1 ligands: requirements for receptor affinity.
Bioorg Med Chem 1996;
4:923-34. [PMID:
8818243 DOI:
10.1016/0968-0896(96)00080-6]
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Abstract
The three-dimensional (3-D) requirements for A1 adenosine receptor affinity have been studied based on hydrogen-bonding functionality correlation between a group of twelve A1 adenosine receptor ligands representing ten structurally different classes of compounds. Electrostatic potential similarity indices and shape similarity indices strongly support the proposed receptor-bound orientations of the ligands. We conclude, in areas common to both agonist and antagonist binding at the A1 receptor, that the ligands are recognized by a similar physicochemical 3-D environment. The finding of similar 3-D requirements for agonists and antagonists suggests a fairly static receptor structure in the region common to agonist and antagonist binding. The ribose moiety is remote from antagonist binding site. Such a 3-D environment rationalizes the binding of a number of potent novel antagonists including KW-3902, not previously reported in modeling studies.
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