Plant dicistronic tRNA-snoRNA genes: a new mode of expression of the small nucleolar RNAs processed by RNase Z

作者: Katarzyna Kruszka , Fredy Barneche , Romain Guyot , Jérôme Ailhas , Isabelle Meneau

DOI: 10.1093/EMBOJ/CDG040

关键词:

摘要: Small nucleolar RNAs (snoRNAs) guiding modifications of ribosomal and other display diverse modes gene organization expression depending on the eukaryotic system: in animals most are intron encoded, yeast many monocistronic genes plants polycistronic (independent or intronic) genes. Here we report an unprecedented organization: plant dicistronic tRNA–snoRNA In Arabidopsis thaliana identified a family encoding 12 novel box C/D snoRNAs (snoR43) located just downstream from tRNAGly We confirmed that they transcribed, probably tRNA promoter, producing tRNAGly–snoR43 precursors. Using transgenic lines expressing tagged tRNA–snoR43.1 show precursor is accurately processed to both snoR43.1 tRNAGly. addition, recombinant RNase Z, 3′ processing enzyme, efficiently cleaves vitro releasing Finally, describe similar case rice implicating tRNAMet-e expressed fusion with snoRNA, showing this mode snoRNA found distant species.

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