Probing the binding pocket of the active site of aromatase with 2-phenylaliphatic androsta-1,4-diene-3,17-dione steroids
摘要:
A series of 2-phenylaliphatic-substituted androsta-1,4-diene-3,17-diones (6) as well as their androstenedione derivatives (5) were synthesized as aromatase inhibitors to gain insights of structure-activity relationships of varying the alkyl moiety (C(1) to C(4)) of the 2-phenylaliphatic substituents as well as introducing a methyl- or trifluoromethyl function to p-position of a phenethyl moiety to the inhibitory activity. The inhibitors examined showed a competitive type inhibition. The 2-phenpropylandrosta-1,4-diene 6c was the most powerful inhibitor (K(i): 16.1 nM) among them. Compounds 6c along with the phenethyl derivative 6b caused a time-dependent inactivation of aromatase (k(inact): 0.0293 and 0.0454 min(-1) for 6b and 6c, respectively). The inactivation was prevented by the substrate androstenedione, and no significant effect of L-cysteine on the inactivation was observed in each case. Molecular docking of the phenpropyl compound 6c to aromatase was conducted to demonstrate that the phenpropyl group orients to a hydrophobic binding pocket in the active site to result in the formation of thermodynamically stable enzyme-inhibitor complex. (C) 2010 Elsevier Inc. All rights reserved.
[EN] PROTEIN CRYSTAL OF HUMAN CYTOCHROME P450 AROMATASE AND USES THEREOF<br/>[FR] CRISTAL DE PROTÉINE DE CYTOCHROME P450 AROMATASE HUMAIN ET UTILISATIONS DE CELUI-CI
申请人:HAUPTMAN WOODWARD MEDICAL RES
公开号:WO2009061859A2
公开(公告)日:2009-05-14
A protein crystal of at least one binding site of a human aromatase and a fully processed human cytochrome P450 aromatase are disclosed. Methods of making and using the aromatase and the protein crystal thereof are further disclosed.