Hermann, T. ; Schmid, B. ; Heumann, H. ; Göringer, H. Ulrich (1997)
A three-dimensional working model for a guide RNA from Trypanosoma brucei.
In: Nucleic acids research, 25 (12)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
RNA editing in protozoan parasites is a mitochondrial RNA processing reaction in which exclusively uridylate residues are inserted into, and less frequently deleted from, pre-mRNAs. Molecules central to the process are so-called guide RNAs (gRNAs) which function as templates in the reaction. For a detailed molecular understanding of the mechanism of the editing process knowledge of structural features of gRNAs will be essential. Here we report on a computer-assisted molecular modelling approach to construct the first three-dimensional gRNA model for gND7-506, a ND7-specific gRNA from Trypanosoma brucei. The modelling process relied on chemical modification and enzymatic probing data and was validated by in vitro mutagenesis experiments. The model predicts a reasonably compact structure, where two stem/loop secondary structure elements are brought into close proximity by a triple A tertiary interaction, forming a core element within the centre of the molecule. The model further suggests that the surface of the gRNA is primarily made up of the sugar-phoshate backbone. On the basis of the model, footprinting experiments of gND7-506 in a complex with the gRNA binding protein gBP21 could successfully be interpreted and provide a first picture for the assembly of gRNAs within a ribonucleoprotein complex.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 1997 |
| Autor(en): | Hermann, T. ; Schmid, B. ; Heumann, H. ; Göringer, H. Ulrich |
| Art des Eintrags: | Bibliographie |
| Titel: | A three-dimensional working model for a guide RNA from Trypanosoma brucei. |
| Sprache: | Englisch |
| Publikationsjahr: | 1997 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Nucleic acids research |
| Jahrgang/Volume einer Zeitschrift: | 25 |
| (Heft-)Nummer: | 12 |
| Kurzbeschreibung (Abstract): | RNA editing in protozoan parasites is a mitochondrial RNA processing reaction in which exclusively uridylate residues are inserted into, and less frequently deleted from, pre-mRNAs. Molecules central to the process are so-called guide RNAs (gRNAs) which function as templates in the reaction. For a detailed molecular understanding of the mechanism of the editing process knowledge of structural features of gRNAs will be essential. Here we report on a computer-assisted molecular modelling approach to construct the first three-dimensional gRNA model for gND7-506, a ND7-specific gRNA from Trypanosoma brucei. The modelling process relied on chemical modification and enzymatic probing data and was validated by in vitro mutagenesis experiments. The model predicts a reasonably compact structure, where two stem/loop secondary structure elements are brought into close proximity by a triple A tertiary interaction, forming a core element within the centre of the molecule. The model further suggests that the surface of the gRNA is primarily made up of the sugar-phoshate backbone. On the basis of the model, footprinting experiments of gND7-506 in a complex with the gRNA binding protein gBP21 could successfully be interpreted and provide a first picture for the assembly of gRNAs within a ribonucleoprotein complex. |
| Fachbereich(e)/-gebiet(e): | 10 Fachbereich Biologie > Genregulation und RNA-Therapeutika ?? fb10_mikrobiologie ?? 10 Fachbereich Biologie |
| Hinterlegungsdatum: | 03 Nov 2011 13:25 |
| Letzte Änderung: | 05 Mär 2013 09:55 |
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