Characterization of the microsomal mixed-function oxygenase system of the hepatopancreas and green gland of the red swamp crayfish, Procambarus clarkii.
1. The microsomal mixed-function oxygenase (MFO) system from the hepatopancreas and green gland of the red swamp crayfish, Procambarus clarkii has been characterized with respect to the constitution of electron transport proteins and the ability to catalyze the metabolism of xenobiotics. 2. Cytochrome P-450 content of hepatopancreas microsomes was approximately 10-fold higher than that of green gland and comparable to that of rat liver. NADPH-cytochrome c reductase activity in hepatopancreas microsomes was approximately 2% of that found in rat liver microsomes. 3. Green gland microsomes catalyzed higher turnover rates of aminopyrine N-demethylase and benzo[a]pyrene hydroxylase than hepatopancreas microsomes. With hepatopancreas microsomes, organic hydroperoxides supported a greater rate of aminopyrine N-demethylation than did NADPH plus O2. 4. P. clarkii hepatopancreas microsomes generally displayed a lower binding affinity (Ks) for a number of type I and type II ligands than did rat liver microsomes.
Jewell
C S
CS
Institute of Environmental Studies, Louisiana State University, Baton Rouge 70803.
Winston
G W
GW
D000818:Animals; D003400:Astacoidea / Q000201:enzymology*; D003577:Cytochrome P-450 Enzyme System / Q000378:metabolism; D003573:Cytochrome b Group / Q000378:metabolism; D015786:Cytochromes b5; D005088:Exocrine Glands / Q000201:enzymology; D008099:Liver / Q000201:enzymology; D008861:Microsomes / Q000201:enzymology; D006899:Mixed Function Oxygenases / Q000378:metabolism*; D009245:NADH Dehydrogenase / Q000378:metabolism; D009251:NADPH-Ferrihemoprotein Reductase / Q000378:metabolism; D010179:Pancreas / Q000201:enzymology
D003573:Cytochrome b Group; D015786:Cytochromes b5; D003577:Cytochrome P-450 Enzyme System; D006899:Mixed Function Oxygenases; D009251:NADPH-Ferrihemoprotein Reductase; D009245:NADH Dehydrogenase