The world's first wiki where authorship really matters (Nature Genetics, 2008). Due credit and reputation for authors. Imagine a global collaborative knowledge base for original thoughts. Search thousands of articles and collaborate with scientists around the globe.

wikigene or wiki gene protein drug chemical gene disease author authorship tracking collaborative publishing evolutionary knowledge reputation system wiki2.0 global collaboration genes proteins drugs chemicals diseases compound
Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Involvement of U1 small nuclear ribonucleoproteins (snRNP) in 5' splice site-U1 snRNP interaction.

U1 small nuclear ribonucleoprotein (snRNP) is an important ribonucleoprotein involved early in the spliceosome formation to commit pre-mRNAs to the splicing pathway. We have determined the association and dissociation kinetics of the 5' splice site-U1 snRNP interaction using purified U1 snRNP and a short RNA oligonucleotide comprising the 5' splice site (5'-SS) consensus sequence of pre-mRNAs (5'-SS RNA oligo). The association is rapid, does not require ATP, and is almost irreversible. Surprisingly, oligonucleotide-directed cleavage of the U1 small nuclear RNA (snRNA) 5' end sequence with RNase H has no significant effect on the rate of association of the 5'-SS RNA oligo, but it does lead to rapid dissociation. This provides evidence that U1-specific snRNP proteins are critical for the 5' splice site recognition while base pairing ensures the stability of the interaction. The recognition of the 5' splice site by U1 snRNP does not result from the individual action of one or more proteins but rather from their organization around U1 snRNA. A consequence of this organization is that the U1-C protein makes direct contacts with the site, as it becomes cross-linked to the RNA oligo upon exposition of the reactions to shortwave UV light.[1]


  1. Involvement of U1 small nuclear ribonucleoproteins (snRNP) in 5' splice site-U1 snRNP interaction. Rossi, F., Forné, T., Antoine, E., Tazi, J., Brunel, C., Cathala, G. J. Biol. Chem. (1996) [Pubmed]
WikiGenes - Universities