help  | about  | cite  | software

Publication : Identification of an evolutionarily divergent U11 small nuclear ribonucleoprotein particle in Drosophila.

First Author  Schneider Claudia Year  2004
Journal  Proc. Natl. Acad. Sci. U.S.A. Volume  101
Pages  9584-9 PubMed ID  15210936
Abstract Text  Previous reports suggested that U11, in contrast to U12 or other small nuclear (sn)RNAs of the U12-type spliceosome, might be either highly divergent or absent in Drosophila melanogaster. Affinity purification of Drosophila U12-containing complexes has led to the identification of the fly U11 snRNA, which contains a potential U12-type 5' splice-site-interacting sequence, but whose sequence and length differs significantly from vertebrate and plant U11. Analysis of U12-type introns revealed an A-rich region directly downstream of Drosophila, but not human, U12-type 5' splice sites. This finding, coupled with the presence of a highly divergent U11 snRNA, and the apparent absence of Drosophila homologs of human U11 proteins, suggest that U12-type 5' splice site recognition might be different in flies. A comparison of U11 snRNAs that we have identified from vertebrates, plants, and insects, suggests that an evolutionarily divergent U11 snRNA may be unique to Drosophila and not characteristic of insects in general. Doi  10.1073/pnas.0403400101
Issue  26 Month  Jun

Publication Annotations Displayer

23 Entities

13 Mesh Terms