Purification, molecular cloning, and cell-specific gene expression of the alkaloid-accumulation associated protein CrPS in Catharanthus roseus
Identification of molecular markers of monoterpenoid indole alkaloid (MIA) accumulation in cell-suspension cultures of Madagascar periwinkle (Catharanthus roseus (L.) G. Don) was performed by two-dimensional polyacrylamide gel electrophoresis. Comparison of the protein patterns from alkaloid-produci...
| Publié dans: | Journal of experimental botany. - 1985. - 56(2005), 414 vom: 06. Apr., Seite 1221-8 |
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| Auteur principal: | |
| Autres auteurs: | , , , , , , , |
| Format: | Article |
| Langue: | English |
| Publié: |
2005
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| Accès à la collection: | Journal of experimental botany |
| Sujets: | Journal Article Alkaloids DNA Primers Plant Proteins RNA, Plant |
| Résumé: | Identification of molecular markers of monoterpenoid indole alkaloid (MIA) accumulation in cell-suspension cultures of Madagascar periwinkle (Catharanthus roseus (L.) G. Don) was performed by two-dimensional polyacrylamide gel electrophoresis. Comparison of the protein patterns from alkaloid-producing and non-producing cells showed the specific occurrence of a 28 kDa polypeptide restricted to cells accumulating MIAs. The polypeptide was purified by preparative two-dimensional gel electrophoresis, digested with trypsin, and microsequenced by the Edman degradation method. Cloning of the corresponding cDNA revealed that the protein which has been named CrPS (Catharanthus roseus Protein S) is a member of the alpha/beta hydrolase superfamily. Time-course expression studies by northern blot analysis confirmed that CrPS gene expression was associated with MIA accumulation in cell suspension cultures. In the whole plant, multicellular compartmentation is required for alkaloid biosynthesis. In situ mRNA hybridization on developing leaves revealed that CrPS mRNA and transcripts encoding the first enzymes of the MIA pathway were co-localized in internal phloem parenchyma cells. The possible implication of the alkaloid-accumulation associated protein CrPS in the signal transduction pathway leading to MIA production is discussed |
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| Description: | Date Completed 05.07.2005 Date Revised 21.03.2005 published: Print-Electronic GENBANK: AY751530 Citation Status MEDLINE |
| ISSN: | 1460-2431 |