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Research ArticleMetabolism and Enzymology
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Subcellular Localization of Enzymes Involved in Indole Alkaloid Biosynthesis in Catharanthus roseus

Vincenzo De Luca, Adrian J. Cutler
Vincenzo De Luca
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Adrian J. Cutler
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Published December 1987. DOI: https://doi.org/10.1104/pp.85.4.1099

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Abstract

The subcellular localization of enzymes involved in indole alkaloid biosynthesis in leaves of Catharanthus roseus has been investigated. Tryptophan decarboxylase and strictosidine synthase which together produce strictosidine, the first indole alkaloid of this pathway, are both cytoplasmic enzymes. S-Adenosyl-l-methionine: 16-methoxy-2,3-dihydro-3-hydroxytabersonine-N-methyltransferase which catalyses the third to last step in vindoline biosynthesis could be localized in the chloroplasts of Catharanthus leaves and is specifically associated with thylakoids. Acetyl-coenzyme-A-deacetylvindoline-O-acetyltransferase which catalyses the last step in vindoline biosynthesis could also be localized in the cytoplasm. The participation of the chloroplast in this pathway suggests that indole alkaloid intermediates enter and exit this compartment during the biosynthesis of vindoline.

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Subcellular Localization of Enzymes Involved in Indole Alkaloid Biosynthesis in Catharanthus roseus
Vincenzo De Luca, Adrian J. Cutler
Plant Physiology Dec 1987, 85 (4) 1099-1102; DOI: 10.1104/pp.85.4.1099

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Subcellular Localization of Enzymes Involved in Indole Alkaloid Biosynthesis in Catharanthus roseus
Vincenzo De Luca, Adrian J. Cutler
Plant Physiology Dec 1987, 85 (4) 1099-1102; DOI: 10.1104/pp.85.4.1099
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Plant Physiology
Vol. 85, Issue 4
December 1987
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More in this TOC Section

  • Identification of Posttranslationally Modified 18-Kilodalton Protein from Rice as Eukaryotic Translation Initiation Factor 5A
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  • Inhibition of Barnyardgrass 4-Hydroxyphenylpyruvate Dioxygenase by Sulcotrione
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