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. 2021 Jan;27(1):66–79. doi: 10.1261/rna.076810.120

FIGURE 5.

FIGURE 5.

Catalytically inactive PUS10 selectively binds only certain other tRNAs. (A) Radiolabeled tRNAs for Trp, Gln, Ala, and Phe (indicated below the panels) were incubated with increasing concentrations of h-PUS10, resolved by native PAGE, and visualized by phosphorimaging. (B) Reactions similar to those in A using i-PUS10 with tRNATrp and tRNAAla. (C) Reactions similar to those in A using h-PUS10 with tRNAiMet and tRNAAU-Ala and their mutants (mut-iMet and mut-AU-Ala) where sequences at positions 59–60 were interchanged as described in the text. (D) Separately radiolabeled tRNATrp (*Trp) along with increasing concentrations of unlabeled tRNAs (indicated above the panels) for Trp, Gln, initiator Met, and Phe were incubated with h-PUS (20 µM), resolved by native PAGE, and visualized by phosphorimaging. The first lane in each panel contains only the radiolabeled tRNATrp, with no unlabeled tRNA or h-PUS10. (E) Reactions similar to A after separate incubations of tRNATrp with nh-PUS10 and ch-PUS10.