The effect of alpha-ecdysone and phenobarbital on the alpha-ecdysone 20-monooxygenase of house fly larva
Biochemical and Biophysical Research Communications, ISSN: 0006-291X, Vol: 148, Issue: 3, Page: 1075-1080
1987
- 22Citations
- 2Captures
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Metrics Details
- Citations22
- Citation Indexes22
- CrossRef22
- 21
- Captures2
- Readers2
Article Description
The NADPH-dependent cytochrome P-450 20-monooxygenation of α -ecdysone is catalyzed both by mitochondria and microsomes isolated from Musca domestica, L. larvae, but about 50% of the activity is associated with mitochondria and 37% with microsomes. The mitochondrial activity is increased by pretreatment with α -ecdysone with a concomitant decrease in Km values. This effect is not observed in microsomes. Induction with phenobarbital represses the mitochondrial 20-monooxygenase but does not change the microsomal activity, although a large increase in cytochrome P-450 is observed in the latter fraction. It is concluded that only the mitochondrial 20-monooxygenase appears to be regulated by α -ecdysone which suggests that mitochondrial cytochrome P-450 forms are involved in the moulting phenomenon; whereas, microsomal cytochrome P-450 activity may be of a nonspecific nature and not relevant to development.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0006291X87802413; http://dx.doi.org/10.1016/s0006-291x(87)80241-3; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0023652884&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/3689386; http://linkinghub.elsevier.com/retrieve/pii/S0006291X87802413; http://api.elsevier.com/content/article/PII:S0006291X87802413?httpAccept=text/xml; http://api.elsevier.com/content/article/PII:S0006291X87802413?httpAccept=text/plain; https://linkinghub.elsevier.com/retrieve/pii/S0006291X87802413; http://dx.doi.org/10.1016/s0006-291x%2887%2980241-3; https://dx.doi.org/10.1016/s0006-291x%2887%2980241-3
Elsevier BV
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