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Ataxin-2 Interacts with the DEAD/H-Box RNA Helicase DDX6 and Interferes with P-Bodies and Stress Granules

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Nonhoff, Ute, Ralser, Markus, Welzel, Franziska, Piccini, Ilaria, Balzereit, Daniela, Yaspo, Marie-Laure, Lehrach, Hans, Krobitsch, Sylvia·2007·Molecular Biology of the Cell

Abstract

Tight control of translation is fundamental for eukaryotic cells, and deregulation of proteins implicated contributes to numerous human diseases. The neurodegenerative disorder spinocerebellar ataxia type 2 is caused by a trinucleotide expansion in the SCA2 gene encoding a lengthened polyglutamine stretch in the gene product ataxin-2, which seems to be implicated in cellular RNA-processing pathways and translational regulation. Here, we substantiate a function of ataxin-2 in such pathways by demonstrating that ataxin-2 interacts with the DEAD/H-box RNA helicase DDX6, a component of P-bodies and stress granules, representing cellular structures of mRNA triage. We discovered that altered ataxin-2 levels interfere with the assembly of stress granules and cellular P-body structures. Moreover, ataxin-2 regulates the intracellular concentration of its interaction partner, the poly(A)-binding protein, another stress granule component and a key factor for translational control. Thus, our data imply that the cellular ataxin-2 concentration is important for the assembly of stress granules and P-bodies, which are main compartments for regulating and controlling mRNA degradation, stability, and translation.

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Metadata

Authors
Nonhoff, U., Ralser, M., Welzel, F., Piccini, I., Balzereit, D., Yaspo, M.-L., Lehrach, H., & Krobitsch, S.
Venue
Molecular Biology of the Cell
Published
2007-04
Volume
18
Issue
4
Pages
1385-1396
ISSN
  • 1059-1524 (ISSN-L)
  • 1939-4586
OpenAlex
W2169158245
Cited by
347
References
3
FWCI
3.01
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Ataxin-2 Interacts with the DEAD/H-Box RNA Helicase DDX6 and Interferes with P-Bodies and Stress Granules. https://app.cochat.ai/papers/10.1091/mbc.e06-12-1120
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Nonhoff, U., Ralser, M., Welzel, F., Piccini, I., Balzereit, D., Yaspo, M.-L., Lehrach, H., & Krobitsch, S. (2007). Ataxin-2 Interacts with the DEAD/H-Box RNA Helicase DDX6 and Interferes with P-Bodies and Stress Granules. Molecular Biology of the Cell. https://doi.org/10.1091/mbc.e06-12-1120

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