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Protein prenylation in spinach chloroplasts.
Stockholm University.
Stockholm University.
Stockholm University.
1999 (English)In: Proceedings of the National Academy of Sciences of the United States of America, ISSN 0027-8424, E-ISSN 1091-6490, Vol. 96, no 18, 10074-10079 p.Article in journal (Refereed) Published
Abstract [en]

Protein prenylation in plants was studied by in vivo metabolic (3)H-mevalonate labeling in combination with a range of protein synthesis inhibitors. In spinach cotyledons, this posttranslational protein modification was found to be divided into two categories, one representing the conventional prenylation involving farnesyl and geranylgeranyl groups bound to cysteine residues via thioether linkages. This category revealed a similar pattern of prenylated proteins to that observed in mammalian cells and depends on nuclear gene expression. The other category was shown to represent a type of prenylation confined to chloroplasts. It depends on plastid gene expression and does not involve a thioether bond. The modifying isoprenoid could be released from the chloroplastic polypeptides by alkaline treatment and was identified as phytol upon GC-MS analysis. The phytol could readily be derived from all-trans-[(3)H]farnesol, which, like all-trans-[(3)H]geranylgeraniol, was taken up by the cotyledons, resulting in incorporation of radiolabel into proteins.

Place, publisher, year, edition, pages
1999. Vol. 96, no 18, 10074-10079 p.
National Category
Biochemistry and Molecular Biology
Identifiers
URN: urn:nbn:se:uu:diva-193092DOI: 10.1073/pnas.96.18.10074ISI: 000082424100028PubMedID: 10468564OAI: oai:DiVA.org:uu-193092DiVA: diva2:601310
Available from: 2013-01-29 Created: 2013-01-29 Last updated: 2017-12-06Bibliographically approved

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Parmryd, Ingela

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