Validation and classification of RNA binding proteins identified by mRNA interactome capture
RNA binding proteins (RBPs) take part in all steps of the RNA life cycle and are often essential for cell viability. Most RBPs have a modular organization and comprise a set of canonical RNA binding domains. However, in recent years a number of high-throughput mRNA interactome studies on yeast, mamm...
Gespeichert in:
| Hauptverfasser: | , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
July 2,2021
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| In: |
RNA
Year: 2021, Jahrgang: 27, Heft: 10, Pages: 1173-1185 |
| ISSN: | 1469-9001 |
| DOI: | 10.1261/rna.078700.121 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1261/rna.078700.121 Verlag, lizenzpflichtig, Volltext: http://rnajournal.cshlp.org/content/27/10/1173 
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| Verfasserangaben: | Vaishali, Lyudmila Dimitrova-Paternoga, Kevin Haubrich, Mai Sun, Anne Ephrussi, and Janosch Hennig |
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| 520 | |a RNA binding proteins (RBPs) take part in all steps of the RNA life cycle and are often essential for cell viability. Most RBPs have a modular organization and comprise a set of canonical RNA binding domains. However, in recent years a number of high-throughput mRNA interactome studies on yeast, mammalian cell lines, and whole organisms have uncovered a multitude of novel mRNA interacting proteins that lack classical RNA binding domains. Whereas a few have been confirmed to be direct and functionally relevant RNA binders, biochemical and functional validation of RNA binding of most others is lacking. In this study, we used a combination of NMR spectroscopy and biochemical studies to test the RNA binding properties of six putative RBPs. Half of the analyzed proteins showed no interaction, whereas the other half displayed weak chemical shift perturbations upon titration with RNA. One of the candidates we found to interact weakly with RNA in vitro is Drosophila melanogaster end binding protein 1 (EB1), a master regulator of microtubule plus-end dynamics. Further analysis showed that EB1's RNA binding occurs on the same surface as that with which EB1 interacts with microtubules. RNA immunoprecipitation and colocalization experiments suggest that EB1 is a rather nonspecific, opportunistic RNA binder. Our data suggest that care should be taken when embarking on an RNA binding study involving these unconventional, novel RBPs, and we recommend initial and simple in vitro RNA binding experiments. | ||
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