Primary Citation of Related Structures: 1OUK, 1OUY, 1OVE
PubMed Abstract:
The quinazolinone and pyridol-pyrimidine classes of p38 MAP kinase inhibitors have a previously unseen degree of specificity for p38 over other MAP kinases. Comparison of the crystal structures of p38 bound to four different compounds shows that binding of the more specific molecules is characterized by a peptide flip between Met109 and Gly110 ...
The quinazolinone and pyridol-pyrimidine classes of p38 MAP kinase inhibitors have a previously unseen degree of specificity for p38 over other MAP kinases. Comparison of the crystal structures of p38 bound to four different compounds shows that binding of the more specific molecules is characterized by a peptide flip between Met109 and Gly110. Gly110 is a residue specific to the alpha, beta and gamma isoforms of p38. The delta isoform and the other MAP kinases have bulkier residues in this position. These residues would likely make the peptide flip energetically unfavorable, thus explaining the selectivity of binding. To test this hypothesis, we constructed G110A and G110D mutants of p38 and measured the potency of several compounds against them. The results confirm that the selectivity of quinazolinones and pyridol-pyrimidines results from the presence of a glycine in position 110. This unique mode of binding may be exploited in the design of new p38 inhibitors.
Related Citations:
p38MAP kinase inhibitors part 1: Design and development of a new class of potent and highly selective inhibitors based on 3,4-dihydropyrido[3,2-d]pyrimidone scaffold Natarajan, S.R., Wisnoski, D.D., Singh, S.B., Stelmach, J.E., O'Neill, E.A., Schwartz, C.D., Thompson, C.M., Fitzgerald, C.E., O'keefe, S.J., Kumar, S., Hop, C.E., Zaller, D.M., Schmatz, D.M., Doherty, J.B. (2003) Bioorg Med Chem Lett 13: 273
Organizational Affiliation:
Department of Immunology, Merck Research Laboratories, PO Box 2000, Rahway, New Jersey 07065, USA.
1-(2,6-DICHLOROPHENYL)-6-[(2,4-DIFLUOROPHENYL)SULFANYL]-7-(1,2,3,6-TETRAHYDRO-4-PYRIDINYL)-3,4-DIHYDROPYRIDO[3,2-D]PYRIMIDIN-2(1H)-ONE C24 H18 Cl2 F2 N4 O S PZUXNWPJBLCJKB-UHFFFAOYSA-N
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