S. Ahmed et Cp. Owen, MECHANISM OF 17-ALPHA-HYDROXYLASE 17,20-LYASE - AN INITIAL GEOMETRIC PERSPECTIVE FOR THE LYASE OF THE C(17)-C(20) BOND OF C-21 STEROIDS/, Bioorganic & medicinal chemistry letters, 8(9), 1998, pp. 1023-1028
Using the novel 'substrate-heme complex' approach(1), the mechanism of
17 alpha-Hydroxylase/1 7,20-Lyase (P-450(17 alpha)), in particular th
e lyase of the C(17)-C(20) bond, is considered from a geometric perspe
ctive. The results of the study appear to suggest that the final oxida
tive step in the lyase of the C(17)-C(20) bond involves the use of a f
erroxy attacking species as opposed to peroxy or a mixture of ferroxy
and peroxy, an observation which is consistent with results previously
Obtained with Aromatase(1). (C) 1998 Elsevier Science Ltd. All rights
reserved.