CoMFA-based prediction of agonist affinities at recombinant wild type versus serine to alanine point mutated D2 dopamine receptors

R. E. Wilcox, W. H. Huang, M. Y K Brusniak, D. M. Wilcox, R. S. Pearlman, M. M. Teeter, C. J. DuRand, B. L. Wiens, Kim Neve

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

Agonist affinity changes dramatically as a result of serine to alanine mutations (S193A, S194A, and S197A) within the fifth transmembrane region of D2 dopamine receptors and other receptors for monoamine neurotransmitters. However, agonist 2D-structure does not predict which drugs will be sensitive to which point mutations. Modeling drug-receptor interactions at the 3D level offers considerably more promise in this regard. In particular, a comparison of the same test set of agonists across receptors differing minimally (point mutations) offers promise to enhance the understanding of the structural bases for drug-receptor interactions. We have previously shown that comparative molecular field analysis (CoMFA) can be applied to comparisons of affinity at recombinant D1 and D2 dopamine receptors for the same set of agonists, a differential QSAR. Here, we predicted agonist K(L) for the same set of agonists at wild type D2 vs S193A, S194A, and S197A receptors using CoMFA. Each model used bromocriptine as the template, ln(1/K(L)) values for the low-affinity agonist binding conformation at recombinant wild type and mutant D2 dopamine receptors stably expressed in C6 glioma cells were used as the target property for the CoMFA of the 16 aligned agonist structures. The resulting CoMFA models yielded cross-validated R2 (q2) values ranging from 0.835 to 0.864 and simple R2 values ranging from 0.999 to 1.000. Predictions of test compound affinities at WT and each mutant receptor were close to measured affinity values. This finding confirmed the predictive ability of the models and their differences from one another. The results strongly support the idea that CoMFA models of the same training set of compounds applied to WT vs mutant receptors can accurately predict differences in drug affinity at each. Furthermore, in a 'proof of principle', two different templates were used to derive the CoMFA model for the WT and S193A mutant receptors. Pergolide was chosen as an alternate template because it showed a significant increase in affinity as a result of the S193A mutation. In this instance both the bromocriptine- and pergolide-based CoMFA models were similar to one another but different from those for the WT receptor using bromocriptine- or pergolide- as templates. The pergolide-based S193A model was more strikingly different from that of the WT receptor than was the bromocriptine-based S193A model. This suggests that a 'dual-template' approach to differential CoMFA may have special value in elucidating key differences across related receptor types and in determining important elements of the drug - receptor interaction.

Original languageEnglish (US)
Pages (from-to)3005-3019
Number of pages15
JournalJournal of Medicinal Chemistry
Volume43
Issue number16
DOIs
StatePublished - Aug 10 2000
Externally publishedYes

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Pergolide
Bromocriptine
Dopamine D2 Receptors
Drug Receptors
Alanine
Serine
Drug Interactions
Point Mutation
Dopamine D1 Receptors
Mutation
Neurotransmitter Receptor
Quantitative Structure-Activity Relationship
Glioma
Pharmaceutical Preparations
Neurotransmitter Agents
Conformations

ASJC Scopus subject areas

  • Organic Chemistry

Cite this

CoMFA-based prediction of agonist affinities at recombinant wild type versus serine to alanine point mutated D2 dopamine receptors. / Wilcox, R. E.; Huang, W. H.; Brusniak, M. Y K; Wilcox, D. M.; Pearlman, R. S.; Teeter, M. M.; DuRand, C. J.; Wiens, B. L.; Neve, Kim.

In: Journal of Medicinal Chemistry, Vol. 43, No. 16, 10.08.2000, p. 3005-3019.

Research output: Contribution to journalArticle

Wilcox, RE, Huang, WH, Brusniak, MYK, Wilcox, DM, Pearlman, RS, Teeter, MM, DuRand, CJ, Wiens, BL & Neve, K 2000, 'CoMFA-based prediction of agonist affinities at recombinant wild type versus serine to alanine point mutated D2 dopamine receptors', Journal of Medicinal Chemistry, vol. 43, no. 16, pp. 3005-3019. https://doi.org/10.1021/jm990526y
Wilcox, R. E. ; Huang, W. H. ; Brusniak, M. Y K ; Wilcox, D. M. ; Pearlman, R. S. ; Teeter, M. M. ; DuRand, C. J. ; Wiens, B. L. ; Neve, Kim. / CoMFA-based prediction of agonist affinities at recombinant wild type versus serine to alanine point mutated D2 dopamine receptors. In: Journal of Medicinal Chemistry. 2000 ; Vol. 43, No. 16. pp. 3005-3019.
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AU - Wilcox, R. E.

AU - Huang, W. H.

AU - Brusniak, M. Y K

AU - Wilcox, D. M.

AU - Pearlman, R. S.

AU - Teeter, M. M.

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