The diagnostic substrate bicyclohexane reveals a radical mechanism for bacterial cytochrome P450 in whole cells

被引:26
作者
Austin, Rachel N. [1 ]
Deng, Dayi
Jiang, Yongying
Luddy, Kate
van Beilen, Jan B.
de Montellano, Paul R. Ortiz
Groves, John T.
机构
[1] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA
[2] Bates Coll, Dept Chem, Lewiston, ME 04240 USA
[3] Univ Calif San Francisco, Dept Pharmaceut Chem, San Francisco, CA 94143 USA
[4] ETH, Inst Biotechnol, CH-8093 Zurich, Switzerland
关键词
alkanes; cytochromes; oxidation; radical ions; reaction mechanisms;
D O I
10.1002/anie.200603282
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
(Figure Presented) On home ground: The reaction mechanisms of bacterial alkane-oxidizing cytochrome P450s were determined in their native environment using a novel diagnostic substrate probe, bicyclohexane, in whole cells and cell-free extracts (see picture). Purified P450cam also oxidizes bicyclohexane. Clear evidence for a substrate-based radical with a lifetime of 75-250 ps was obtained. © 2006 Wiley-VCH Verlag GmbH & Co. KGaA.
引用
收藏
页码:8192 / 8194
页数:3
相关论文
共 32 条
[1]   The effect of heme environment on the hydrogen abstraction reaction of camphor in P450cam catalysis:: A QM/MM study [J].
Altun, A ;
Guallar, V ;
Friesner, RA ;
Shaik, S ;
Thiel, W .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (12) :3924-3925
[2]  
[Anonymous], 2005, Cytochrome P450: structure, mechanism, and biochemistry, DOI DOI 10.1007/0-387-27447-2_1
[3]   Revisiting the mechanism of P450 enzymes with the radical clocks norcarane and spiro[2,5]octane [J].
Auclair, K ;
Hu, ZB ;
Little, DM ;
de Montellano, PRO ;
Groves, JT .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (21) :6020-6027
[4]   The non-heme diiron alkane monooxygenase of Pseudomonas oleovorans (AlkB) hydroxylates via a substrate radical intermediate [J].
Austin, RN ;
Chang, HK ;
Zylstra, GJ ;
Groves, JT .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2000, 122 (47) :11747-11748
[5]   Cytochrome P450 enzymes from the metabolically diverse bacterium Rhodopseudomonas palustris [J].
Bell, SG ;
Hoskins, N ;
Xu, F ;
Caprotti, D ;
Rao, ZH ;
Wong, LL .
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, 2006, 342 (01) :191-196
[6]   Reaction mechanisms of non-heme diiron hydroxylases characterized in whole cells [J].
Bertrand, E ;
Sakai, R ;
Rozhkova-Novosad, E ;
Moe, L ;
Fox, BG ;
Groves, JT ;
Austin, RN .
JOURNAL OF INORGANIC BIOCHEMISTRY, 2005, 99 (10) :1998-2006
[7]   A RADICAL CLOCK INVESTIGATION OF MICROSOMAL CYTOCHROME-P-450 HYDROXYLATION OF HYDROCARBONS - RATE OF OXYGEN REBOUND [J].
BOWRY, VW ;
INGOLD, KU .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1991, 113 (15) :5699-5707
[8]   Hydroxylation by the hydroperoxy-iron species in cytochrome P450 enzymes [J].
Chandrasena, REP ;
Vatsis, KP ;
Coon, MJ ;
Hollenberg, PF ;
Newcomb, M .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (01) :115-126
[9]  
DEMONTELLANO PRO, 1987, J AM CHEM SOC, V109, P3415
[10]   Kinetic isotope effects implicate the iron-oxene as the sole oxidant in P450-catalyzed N-dealkylation [J].
Dowers, TS ;
Rock, DA ;
Rock, DA ;
Jones, JP .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (29) :8868-8869