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2'-5' RNA ligase This protein family consists of bacterial and archaeal proteins with two tandem copies of Pfam domain pfam02834. Members for which activity has been measured perform a reversible, ATP-independent 2'-5'-ligation of what is presumably a non-phyiological substrate: half-tRNA splice intermediates from an intron-containing yeast tRNA. The physiological substrate(s) in prokaryotes may include small 2'-5'-link-containing oligonucleotides, perhaps with regulatory or biosynthetic roles. [Transcription, RNA processing]
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