Title : Aminopyrine metabolism by multiple forms of cytochrome P-450 from rat liver microsomes: simultaneous quantitation of four aminopyrine metabolites by high-performance liquid chromatography.

Pub. Date : 1988 Aug 15

PMID : 3415241






7 Functional Relationships(s)
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Compound Name
Protein Name
Organism
1 P-450 UT-2 (P-450h) had high aminopyrine N-demethylation and hydroxylation activities, but P-450 F-2 (P-450i) had low N-demethylation activity and no hydroxylation activities, but P-450 F-2 (P-450i) had low N-demethylation activity and no hydroxylation activity. Aminopyrine cytochrome P450, subfamily 2, polypeptide 11 Rattus norvegicus
2 P-450 UT-2 (P-450h) had high aminopyrine N-demethylation and hydroxylation activities, but P-450 F-2 (P-450i) had low N-demethylation activity and no hydroxylation activities, but P-450 F-2 (P-450i) had low N-demethylation activity and no hydroxylation activity. Aminopyrine cytochrome P450, subfamily 2, polypeptide 11 Rattus norvegicus
3 P-450 UT-2 (P-450h) had high aminopyrine N-demethylation and hydroxylation activities, but P-450 F-2 (P-450i) had low N-demethylation activity and no hydroxylation activities, but P-450 F-2 (P-450i) had low N-demethylation activity and no hydroxylation activity. Nitrogen cytochrome P450, subfamily 2, polypeptide 11 Rattus norvegicus
4 P-450 UT-2 (P-450h) had high aminopyrine N-demethylation and hydroxylation activities, but P-450 F-2 (P-450i) had low N-demethylation activity and no hydroxylation activities, but P-450 F-2 (P-450i) had low N-demethylation activity and no hydroxylation activity. Nitrogen cytochrome P450, subfamily 2, polypeptide 11 Rattus norvegicus
5 Addition of cytochrome b5 to the reconstituted system enhanced the aminopyrine hydroxylation activities of P-450s UT-1, UT-2, PB-2, and PB-5. Aminopyrine cytochrome P450, subfamily 2, polypeptide 11 Rattus norvegicus
6 The kinetics of the four major cytochrome P-450s (P-450 UT-2, UT-4, PB-4, and MC-5) for aminopyrine N-demethylation and hydroxylation activities were studied. Aminopyrine cytochrome P450, subfamily 2, polypeptide 11 Rattus norvegicus
7 P-450s PB-4 and UT-2 had similar Km values (0.50 and 0.62 mM, respectively) in aminopyrine N-demethylation activity. Aminopyrine cytochrome P450, subfamily 2, polypeptide 11 Rattus norvegicus