Separation and paired proteome profiling of plant chloroplast and cytoplasmic ribosomes
Conventional preparation methods of plant ribosomes fail to resolve non-translating chloroplast or cytoplasmic ribosome subunits from translating fractions. We established preparation of these ribosome complexes from Arabidopsis thaliana leaf, root, and seed tissues by optimized sucrose density grad...
Gespeichert in:
| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
14 July 2020
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| In: |
Plants
Year: 2020, Jahrgang: 9, Heft: 7 |
| ISSN: | 2223-7747 |
| DOI: | 10.3390/plants9070892 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.3390/plants9070892 Verlag, Volltext: https://www.mdpi.com/2223-7747/9/7/892 
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| Verfasserangaben: | Alexandre Augusto Pereira Firmino, Michal Gorka, Alexander Graf, Aleksandra Skirycz, Federico Martinez-Seidel, Kerstin Zander, Joachim Kopka and Olga Beine-Golovchuk |
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| 520 | |a Conventional preparation methods of plant ribosomes fail to resolve non-translating chloroplast or cytoplasmic ribosome subunits from translating fractions. We established preparation of these ribosome complexes from Arabidopsis thaliana leaf, root, and seed tissues by optimized sucrose density gradient centrifugation of protease protected plant extracts. The method co-purified non-translating 30S and 40S ribosome subunits separated non-translating 50S from 60S subunits, and resolved assembled monosomes from low oligomeric polysomes. Combining ribosome fractionation with microfluidic rRNA analysis and proteomics, we characterized the rRNA and ribosomal protein (RP) composition. The identity of cytoplasmic and chloroplast ribosome complexes and the presence of ribosome biogenesis factors in the 60S-80S sedimentation interval were verified. In vivo cross-linking of leaf tissue stabilized ribosome biogenesis complexes, but induced polysome run-off. Omitting cross-linking, the established paired fractionation and proteome analysis monitored relative abundances of plant chloroplast and cytoplasmic ribosome fractions and enabled analysis of RP composition and ribosome associated proteins including transiently associated biogenesis factors. | ||
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| 650 | 4 | |a tissue specific separation | |
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