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Nucleic Acids Res. 1988 Nov 11;16(21):10131-52.

The sequence of U3 from Schizosaccharomyces pombe suggests structural divergence of this snRNA between metazoans and unicellular eukaryotes.

Author information

1
Department of Biochemistry, University of Illinois, Urbana 61801.

Erratum in

  • Nucleic Acids Res 1991 Jun 25;19(12):3484.

Abstract

We have cloned and sequenced one of the two genes encoding a 255 nucleotide small nuclear RNA from the fission yeast Schizosaccharomyces pombe. Based on the presence of four regions of primary sequence conservation and a predicted secondary structure similar to that previously proposed for human U3, we conclude that this molecule is the fission yeast homologue of this mammalian snRNA. The 5' one-third of fission yeast U3 is, however, unable to form a single stable hairpin as proposed for this region of the human RNA, but rather folds into two stem-loop structures. By analogy to fission yeast U3, we propose revised secondary structures containing two hairpins for this portion of the U3-like snRNAs from Saccharomyces cerevisiae and Dictyostelium discoideum. Thus, our data suggest that the structure of U3 snRNA has diverged in lower and higher eukaryotes.

PMID:
3194197
PMCID:
PMC338842
DOI:
10.1093/nar/16.21.10131
[Indexed for MEDLINE]
Free PMC Article

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