Science (American Association for the Advancement of Science), 2012-11, Vol.338 (6107), p.655-659
2012
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- Autor(en) / Beteiligte
- Titel
- Chloroplast Biogenesis Is Regulated by Direct Action of the Ubiquitin-Proteasome System
- Ist Teil von
- Science (American Association for the Advancement of Science), 2012-11, Vol.338 (6107), p.655-659
- Ort / Verlag
- Washington, DC: American Association for the Advancement of Science
- Erscheinungsjahr
- 2012
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- Development of chloroplasts and other plastids depends on the import of thousands of nucleus-encoded proteins from the cytosoL Import is initiated by TOC (translocon at the outer envelope of chloroplasts) complexes in the plastid outer membrane that incorporate multiple, client-specific receptors. Modulation of import is thought to control the plastid's proteome, developmental fate, and functions. Using forward genetics, we identified Arabidopsis SP1, which encodes a RING-type ubiquitin E3 ligase of the chloroplast outer membrane. The SP1 protein associated with TOC complexes and mediated ubiquitination of TOC components, promoting their degradation. Mutant sp1 plants performed developmental transitions that involve plastid proteome changes inefficiently, indicating a requirement for reorganization of the TOC machinery. Thus, the ubiquitin-proteasome system acts on plastids to control their development.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0036-8075eISSN: 1095-9203DOI: 10.1126/science.1225053Titel-ID: cdi_proquest_miscellaneous_1808102791
- Format
- –
- Schlagworte
- Apoptosis Regulatory Proteins - chemistry, Apoptosis Regulatory Proteins - genetics, Apoptosis Regulatory Proteins - metabolism, Arabidopsis - genetics, Arabidopsis - growth & development, Arabidopsis - metabolism, Arabidopsis - ultrastructure, Arabidopsis Proteins - chemistry, Arabidopsis Proteins - genetics, Arabidopsis Proteins - metabolism, Biodegradation, Biological and medical sciences, Chloroplast Proteins - metabolism, Chloroplasts, Chloroplasts - metabolism, Chloroplasts - ultrastructure, Control, Degradation, Enzymes, Fundamental and applied biological sciences. Psychology, Gene expression regulation, Government regulations, Imports, Machinery, Mathematical rings, Membrane Proteins - genetics, Membrane Proteins - metabolism, Metabolism, Mutation, Plant cells, Plant physiology and development, Plant sciences, Plants, Plastids, Proteases, Proteasome Endopeptidase Complex - metabolism, Protein Precursors - genetics, Protein Precursors - metabolism, Protein Transport, Proteins, Proteome, Proteomes, Receptors, RING Finger Domains, Screens, Ubiquitin-Protein Ligases - chemistry, Ubiquitin-Protein Ligases - genetics, Ubiquitin-Protein Ligases - metabolism, Ubiquitination, Ubiquitins