Download MendeleyFluorescent probes for cytochrome P450 structural characterization and inhibitor screening
Dunn, A.R., Hays, A.M., Goodin, D.B., Stout, C.D., Chiu, R., Winkler, J.R., Gray, H.B.(2002) J Am Chem Soc 124: 10254-10255
- PubMed: 12197708
- DOI: https://doi.org/10.1021/ja0271678
- Primary Citation of Related Structures:
1LWL - PubMed Abstract:
We have synthesized two luminescent probes (D-4-Ad and D-8-Ad) that target cytochrome P450cam. D-4-Ad luminescence is quenched by Förster energy transfer upon binding (Kd = 0.83 muM) but is restored when the probe is displaced from the active site by camphor. In contrast, D-8-Ad (Kd approximately 0.02 muM) is not displaced from the enzyme, even in the presence of a large excess of camphor. The 2.2 A resolution crystal structure of the D-8-Ad:P450cam complex reveals extensive hydrophobic contacts between the probe and the enzyme, which result from the conformational flexibility of the B', F, and G helices. Probes with properties similar to those of D-4-Ad potentially could be useful for screening P450 inhibitors.
Organizational Affiliation:
Beckman Institute, California Institute of Technology, Pasadena, California 91125, USA.
