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Science 19 February 1999:
Vol. 283. no. 5405, pp. 1168 - 1171
DOI: 10.1126/science.283.5405.1168
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Reports

A Computational Screen for Methylation Guide snoRNAs in Yeast

Todd M. Lowe, Sean R. Eddy

Small nucleolar RNAs (snoRNAs) are required for ribose 2'-O-methylation of eukaryotic ribosomal RNA. Many of the genes for this snoRNA family have remained unidentified in Saccharomyces cerevisiae, despite the availability of a complete genome sequence. Probabilistic modeling methods akin to those used in speech recognition and computational linguistics were used to computationally screen the yeast genome and identify 22 methylation guide snoRNAs, snR50 to snR71. Gene disruptions and other experimental characterization confirmed their methylation guide function. In total, 51 of the 55 ribose methylated sites in yeast ribosomal RNA were assigned to 41 different guide snoRNAs.

Department of Genetics, Washington University School of Medicine, 4566 Scott Avenue, St. Louis, MO 63110, USA. E-mail: lowe{at}genetics.wustl.edu (T.M.L.) and eddy{at}genetics.wustl.edu (S.R.E.)

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