Published online 7 January 2005
Methods Online |
Detection and discovery of RNA modifications using microarrays
1 Banting and Best Department of Medical Research, University of Toronto 112 College Street, Toronto, ON M5G 1L6, Canada 2 Department of Biochemistry and Biophysics Box 712 University of Rochester School of Medicine Rochester, NY 14642, USA 3 Department of Medical Genetics and Microbiology, University of Toronto 1 King's College Circle, Toronto, ON, Canada
*To whom correspondence should be addressed. Tel: +1 416 946 8260; Fax: +1 416 978 8528; Email: t.hughes{at}utoronto.ca
Received October 15, 2004. Revised December 6, 2004. Accepted December 6, 2004.
Using a microarray that tiles all known yeast non-coding RNAs, we compared RNA from wild-type cells with RNA from mutants encoding known and putative RNA modifying enzymes. We show that at least five types of RNA modification (dihydrouridine, m1G,
, m1A and
) catalyzed by 10 different enzymes (Trm1p, Trm5, Trm10p, Dus1p-Dus4p, Dim1p, Gcd10p and Gcd14p) can be detected by virtue of differential hybridization to oligonucleotides on the array that are complementary to the modified sites. Using this approach, we identified a previously undetected m1A modification in GlnCTG tRNA, the formation of which is catalyzed by the Gcd10/Gcd14 complex.
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