Cytochrome P450: progress and predictions

MJ Coon, X Ding, SJ Pernecky, ADN Vaz - The FASEB Journal, 1992 - Wiley Online Library
The cytochrome P450 gene superfamily encodes many isoforms that are unusual in the variety
of chemical reactions catalyzed and the number of substrates attacked. The latter include …

[PDF][PDF] Peroxidative reactions of diversozymes1

MJ Coon, ADN Vaz, LL Bestervelt - 1996 - deepblue.lib.umich.edu
Cytoehrome P450, the most versatile biological catalyst known, was originally named as a
pigment having a carbon monoxide difference spectrum at about 450 nm and no known …

Multiple activated oxygen species in P450 catalysis: contributions to specificity in drug metabolism

MJ Coon, ADN Vaz, DF McGinnity, HM Peng - Drug metabolism and …, 1998 - ASPET
A hypervalent iron-oxene species has been widely proposed as the “active oxygen” in
cytochrome P450 (P450)-catalyzed reactions. We recently examined the effect of mutation of the …

Epoxidation of olefins by cytochrome P450: evidence from site-specific mutagenesis for hydroperoxo-iron as an electrophilic oxidant

ADN Vaz, DF McGinnity… - Proceedings of the …, 1998 - National Acad Sciences
P450 cytochromes (P450) catalyze many types of oxidative reactions, including the conversion
of olefinic substrates to epoxides by oxygen insertion. In some instances epoxidation …

Cytochrome P450-catalyzed hydroxylation of mechanistic probes that distinguish between radicals and cations. Evidence for cationic but not for radical intermediates

…, PH Toy, PF Hollenberg, ADN Vaz… - Journal of the …, 2000 - ACS Publications
Oxidation of the mechanistic probes trans,trans-2-methoxy-3-phenylmethylcyclopropane
and methylcubane by six cytochrome P450 isozymes has been studied. The probes …

The pharmacokinetics, metabolism, and clearance mechanisms of tofacitinib, a janus kinase inhibitor, in humans

…, J Lin, TF Ryder, W Wang, GS Walker, A Vaz… - Drug Metabolism and …, 2014 - ASPET
Tofacitinib is a novel, oral Janus kinase inhibitor. The objectives of this study were to
summarize the pharmacokinetics and metabolism of tofacitinib in humans, including clearance …

Bioactivation of the nontricyclic antidepressant nefazodone to a reactive quinone-imine species in human liver microsomes and recombinant cytochrome P450 3A4

AS Kalgutkar, ADN Vaz, ME Lame, KR Henne… - Drug metabolism and …, 2005 - ASPET
The therapeutic benefits of the antidepressant nefazodone have been hampered by several
cases of acute hepatotoxicity/liver failure. Although the mechanism of hepatotoxicity remains …

Old yellow enzyme: aromatization of cyclic enones and the mechanism of a novel dismutation reaction

ADN Vaz, S Chakraborty, V Massey - Biochemistry, 1995 - ACS Publications
Revised Manuscript Received January 19, 1995® abstract: The origin of charge transfer bands
that develop on reaction of Old Yellow Enzyme with,/3-unsaturated cyclic ketonessuch as …

In vitro drug interactions of cytochrome p450: an evaluation of fluorogenic to conventional substrates

LH Cohen, MJ Remley, D Raunig, ADN Vaz - Drug Metabolism and …, 2003 - ASPET
Clinically observed drug interactions with cytochrome P450 (P450) enzymes have increased
the need to assess drug interactions of new chemical entities early in the discovery process…

In vitro metabolism studies on the isoxazole ring scission in the anti-inflammatory agent leflunomide to its active α-cyanoenol metabolite A771726: mechanistic …

AS Kalgutkar, HT Nguyen, ADN Vaz, A Doan… - Drug Metabolism and …, 2003 - ASPET
The 3-unsubstituted isoxazole ring in the anti-inflammatory drug leflunomide undergoes a
unique N–O bond cleavage to the active α-cyanoenol metabolite A771726, which resides in …