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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Mühlbauer, S. Schäfer, E. Kunkel, T. Frohnmeyer, H. Harter, K. Kircher, S. |
| Description | Author Affiliation: Harter K ( Department of Biology II/Botany, University of Freiburg, Federal Republic of Germany.); |
| Abstract | The fractionation of cells of a parsley suspension culture [Petroselinum crispum (Mill.) A. Hill] by protoplasting and subsequent removal of the vacuoles led to physiologically intact evacuolated protoplasts retaining light inducibility of chalcone synthase expression. Lysis of the evacuolated protoplasts permitted the isolation of a pure, highly concentrated cytosolic fraction containing major cytosolic membranes but only minor contamination by proplastids, mitochondria, and nuclei. Short-time irradiations of the cytosol with red or UV-containing white light resulted in very fast changes of the phosphorylation pattern of 18-, 40-, 48-, 55- to 70-, and 120-kDa proteins. Major differences were observed between the phosphorylation patterns obtained by red or UV-containing white light treatment, indicating a different primary action of the excited photoreceptors in vitro. Separation of the microsomal fraction from the cytosolic matrix established the localization of these proteins. Chase and photoreversibility experiments revealed that phytochrome in vitro regulates the phosphorylation of the 40-kDa protein by modifying a soluble cytosolic kinase/phosphatase system. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 11 |
| Volume Number | 91 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1994-06-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Plants Radiation Effects Cell Fractionation Cell Membrane Metabolism Cells, Cultured Cytosol Immunoblotting Phosphorylation Plant Proteins Ultrastructure Protoplasts Signal Transduction Vacuoles Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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