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The turnover of cytochrome P450b

Gasser, R. and Hauri, H. P. and Meyer, U. A.. (1982) The turnover of cytochrome P450b. FEBS letters, Vol. 147, H. 2. S. 239-242.

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Official URL: http://edoc.unibas.ch/dok/A5257844

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Abstract

The turnover of the heme and apocytochrome moieties of phenobarbital-inducible microsomal cytochrome P450 (P450b) was investigated. Adult male Sprague-Dawley rats were treated with phenobarbital for 5 days and injected with [35S]methionine and the heme precursor delta-[3H]-aminolevulinic acid. P450b was isolated by immunoprecipitation and quantitated by rocket immunoelectrophoresis. The isotope disappearance curves revealed a mean half-life (T1/2) of 12.4 h for the heme moiety and a T1/2 of 19.1 h for the apoprotein moiety of P450b. The apparently slower catabolic rate of the apoprotein may be due to reutilization of [35S]methionine and does not exclude synchronous turnover of the two moieties. Our data are consistent with the kinetics of the drug-mediated induction of cytochrome P450b.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Former Organization Units Biozentrum > Pharmacology/Neurobiology (Hauri)
UniBasel Contributors:Hauri, Hans-Peter
Item Type:Article, refereed
Bibsysno:Link to catalogue
Publisher:Elsevier Science
ISSN:0014-5793
Note:Publication type according to Uni Basel Research Database: Journal article
Last Modified:22 Mar 2012 14:23
Deposited On:22 Mar 2012 13:32

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