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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Nuclear accumulation of the U1 snRNP-specific protein C is due to diffusion and retention in the nucleus.

The U1 small nuclear ribonucleoprotein particle (snRNP) has an important function in the early formation of the spliceosome, the multicomponent complex in which pre-mRNA splicing takes place. The nuclear localization signals of two of the three U1 snRNP-specific proteins, U1-70K and U1A, have been mapped. Both proteins are transported actively to the nucleus. Here we show by microinjection of Xenopus laevis oocytes that the third U1 snRNP-specific protein, U1C, passively enters the nucleus. Furthermore, we show that in both X. laevis oocytes and cultured HeLa cells mutant U1C proteins that are not able to bind to the U1 snRNP do not accumulate in the nucleus, indicating that nuclear accumulation of U1C is due to incorporation of the protein into the U1 snRNP.[1]

References

  1. Nuclear accumulation of the U1 snRNP-specific protein C is due to diffusion and retention in the nucleus. Klein Gunnewiek, J.M., van Aarssen, Y., van der Kemp, A., Nelissen, R., Pruijn, G.J., van Venrooij, W.J. Exp. Cell Res. (1997) [Pubmed]
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