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Title of Journal: FEMS Microbiol Lett

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Abbravation: FEMS Microbiology Letters

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Narnia

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DOI

10.1002/ange.19650771609

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0378-1097

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Expression in Escherichia coli and properties of t

Authors: Breitenbach Jürgen Misawa Norihiko Kajiwara Susumu Sandmann Gerhard
Publish Date: 1996/07/01
Volume: 140, Issue: 2-3, Pages: 241-246
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Abstract

Jürgen Breitenbach Norihiko Misawa Susumu Kajiwara Gerhard Sandmann Expression in Escherichia coli and properties of the carotene ketolase from Haematococcus pluvialis FEMS Microbiology Letters Volume 140 Issue 23 July 1996 Pages 241–246 https//doiorg/101111/j157469681996tb08343xHigh level expression of the functional βcarotene ketolase gene bkt from Haematococcus pluvialis occurred in Escherichia coli transformants producing βcarotene or zeaxanthin as a result of the presence of additional carotenoid genes from Erwinia uredovora Requirement of molecular oxygen for the insertion of the keto group was demonstrated The final product of this twostep ketolase reaction from βcarotene is canthaxanthin 44′diketoβcarotene with the 4monoketo derivative echinenone as an intermediate A reaction sequence for the formation of astaxanthin from βcarotene was established based on kinetic data on astaxanthin formation in E coli transformants carrying the hydroxylase gene crtZ from Erwinia along with bkt We conclude that the carotenoids zeaxanthin and adonixanthin which accumulate in addition to astaxanthin in this transformant are products of side reactions rather than direct precursors of astaxanthin The possible mechanisms for the formation of the keto derivatives are discussed

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References

citation title=The biosynthetic pathway of astaxanthin in a green alga Haematococcus pluvialis as indicated by inhibition with diphenylamine citation author=Fan L citation author=Vonshak A citation author=Gabbay R citation author=Hirschberg J citation author=Boussiba S citation journal title=Plant Cell Physiol citation year=1995 citation volume=36 citation pages=15191524

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