Gutkowska M, Bieńkowski T, Hung VS, Wanke M, Hertel J, Danikiewicz W, Swiezewska E. Proteins are polyisoprenylated in Arabidopsis thaliana.
Biochem Biophys Res Commun 2004;
322:998-1004. [PMID:
15336563 DOI:
10.1016/j.bbrc.2004.08.025]
[Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2004] [Indexed: 11/28/2022]
Abstract
Isoprenoid lipids were found to be covalently linked to proteins of Arabidopsis thaliana. Their identity (polyprenols: Prenol-9-11 with Pren-10 dominating and dolichols: Dol-15-17 with Dol-16 dominating) was confirmed by means of HPLC/ESI-MS with application of the multiple reaction monitoring technique as well as metabolic labeling of Arabidopsis plants with [(3)H]mevalonate and other precursors. The occurrence of typical farnesol-, geranylgeraniol-, and phytol-modified proteins was also noted. Radioisotopic labeling allowed detection of several proteins that were covalently bound to mevalonate-derived isoprenoid alcohols. A significant portion of polyisoprenylated proteins was recovered in the cytosolic/light vesicular fraction of Arabidopsis cells upon subfractionation. Taken together our data prove that a subset of plant proteins is polyisoprenylated.
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