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.
Probing the binding pocket of the active site of aromatase with 2-phenylaliphatic androsta-1,4-diene-3,17-dione steroids
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.