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Background: Small, untranslated RNA molecules were identified initially in bacteria, but examples can be found in all kingdoms of life. These RNAs carry out diverse functions, and many of them are regulators of gene expression. Genes encoding small, untranslated RNAs are difficult to detect experimentally or to predict by traditional sequence analysis approaches. Thus, in spite of the rising recognition...
Group II introns frequently require assistance by specific factors, maturases, for folding and effective splicing in vivo. The only putative maturase of higher plant chloroplasts is encoded by matK, located in the intron of trnK. We show that in barley matK transcripts are modified at a first codon base by C-to-U RNA editing. The resulting H->Y substitution restores a sequence motif that is present...
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