title: Cloning sequencing and expression of the gene for cytochrome P450meg, the steroid-15 beta-monooxygenase from Bacillus megaterium ATCC 13368.
abstract: A 4.3 kb EcoRI fragment carrying the gene for cytochrome P450meg, the steroid-15 beta-monooxygenase from Bacillus megaterium ATCC 13368, was cloned and completely sequenced. The gene codes for a protein of 410 amino acids and was expressed in Escherichia coli and B. subtilis. Protein extracts from the recombinant E. coli strains were able to hydroxylate corticosteroids in the 15 beta position when supplemented with an extract from a P450- mutant of B. megaterium ATCC 13368 as a source of megaredoxin and megaredoxin reductase. In contrast, 15 beta-hydroxylation was obtained in vitro and in vivo without the addition of external electron transfer proteins, when cytochrome P450meg was produced in B. subtilis 168. Protein extracts from nonrecombinant B. subtilis 168 could also support the in vitro hydroxylation by cytochrome P450meg produced in E. coli.
authors.affiliation: Research Laboratories of Schering AG, Berlin, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Rauschenbach
authors.forename: M
authors.initials: M
authors.lastname: Isernhagen
authors.forename: C
authors.initials: C
authors.lastname: Noeske-Jungblut
authors.forename: W
authors.initials: W
authors.lastname: Boidol
authors.forename: G
authors.initials: G
authors.lastname: Siewert
mesh_terms: D000595:Amino Acid Sequence; D001189:Aryl Hydrocarbon Hydroxylases; D001410:Bacillus megaterium / Q000201:enzymology / Q000235:genetics*; D001412:Bacillus subtilis / Q000235:genetics; D001483:Base Sequence; D003001:Cloning, Molecular; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics* / Q000378:metabolism; D004269:DNA, Bacterial; D004926:Escherichia coli; D005798:Genes, Bacterial; D006900:Hydroxylation; D008969:Molecular Sequence Data; D011994:Recombinant Proteins / Q000235:genetics / Q000378:metabolism; D013250:Steroid Hydroxylases / Q000235:genetics* / Q000378:metabolism
chemical_list: D004269:DNA, Bacterial; D011994:Recombinant Proteins; D003577:Cytochrome P-450 Enzyme System; D013250:Steroid Hydroxylases; D001189:Aryl Hydrocarbon Hydroxylases; C034694:steroid 15-beta-hydroxylase