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Development ePress online publication date 26 May 2004
doi: 10.1242/dev.01170

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Research article

Xenopus Staufen is a component of a ribonucleoprotein complex containing Vg1 RNA and kinesin


Young J. Yoon and Kimberly L. Mowry*
* Author for correspondence (e-mail: kimberly mowry{at}brown.edu)

RNA localization is a key mechanism for generating cell and developmental polarity in a wide variety of organisms. We have performed studies to investigate a role for the Xenopus homolog of the double-stranded RNA-binding protein, Staufen, in RNA localization during oogenesis. We have found that Xenopus Staufen (XStau) is present in a ribonucleoprotein complex, and associates with both a kinesin motor protein and vegetally localized RNAs Vg1 and VegT. A functional role for XStau was revealed through expression of a dominant-negative version that blocks localization of Vg1 RNA in vivo. Our results suggest a central role for XStau in RNA localization in Xenopus oocytes, and provide evidence that Staufen is a conserved link between specific mRNAs and the RNA localization machinery.
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