Reference: Anderson GJ, et al. (1989) Conservation between yeast and man of a protein associated with U5 small nuclear ribonucleoprotein. Nature 342(6251):819-21

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Abstract


The process of nuclear pre-messenger RNA splicing is similar in Saccharomyces cerevisiae and metazoan cells in that the two-step mechanism is identical and the reaction occurs in a large ribonucleoprotein complex, the spliceosome. Little is known, however, about the degree of conservation of splicing factors other than of the small nuclear RNAs (snRNAs). Yeast counterparts of the metazoan spliceosomal snRNAs (U1, U2, U4, U5 and U6) have been identified but, with the exception of U6, the yeast snRNAs are larger and sequence similarity is limited to short regions. By using antibodies against the yeast PRP8 protein, a pre-mRNA splicing factor of relative molecular mass 280,000 (Mr280K) stably associated with U5 small nuclear ribonucleoproteins (snRNPs), we have now identified an immunologically related protein in HeLa cell nuclear extracts. The HeLa cell protein has an Mr greater than 200K and is associated with purified 20S U5 snRNPs. This is the first report of phylogenetic conservation between yeast and man of a protein splicing factor.

Reference Type
Comparative Study | Journal Article | Research Support, Non-U.S. Gov't
Authors
Anderson GJ, Bach M, Lührmann R, Beggs JD
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