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The Elongator subcomplex Elp456 is a hexameric RecA-like ATPase
Sebastian Glatt1, Juliette Létoquart, Céline Faux
1European Molecular Biology Laboratory (EMBL), Structural and Computational Biology Unit, Heidelberg, Germany.
Nature Structural & Molecular Biology
|February 21, 2012
Summary
The Elongator complex
Area of Science:
- Molecular Biology
- Structural Biology
- Biochemistry
Background:
- The Elongator complex is involved in RNA polymerase II transcription and tRNA modification.
- It has clinical relevance due to its association with neurodegenerative diseases.
Purpose of the Study:
- To determine the crystal structure of the Saccharomyces cerevisiae Elongator subcomplex Elp456.
- To elucidate the structural basis for Elongator's function in tRNA modification.
Main Methods:
- X-ray crystallography was used to determine the structure of the Elp456 subcomplex.
- In vitro and in vivo experiments were employed to study Elp456 binding to tRNAs.
Main Results:
- The Elp456 subcomplex forms a heterohexameric ring structure with RecA-like folds.
- ATP regulates the specific binding of the Elp456 hexamer to tRNAs.
- Elp4, Elp5, and Elp6 subunits are crucial for complex integrity.
Conclusions:
- The structure of Elp456 supports a role for Elongator in tRNA modification.
- The findings provide insights into the architecture of the holo-Elongator complex.
- This study explains the importance of individual Elp subunits for complex stability.
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