Figure 3From: Elongation factor eEF1B modulates functions of the release factors eRF1 and eRF3 and the efficiency of translation termination in yeastHigh dosage of TEF5 reduces UAA and UGA readthrough levels in the sup45-sl23tsmutant. The 33G-D373-rSL23 strain with the sup45-sl23tsmutation was transformed with one of the following plasmids: multicopy plasmids YEplac181-TEF5Δi (TEF5-Δi↑) or YEplac181 (M-empty), and centromeric plasmids pRS315-SUP45 (SUP45-CEN) or pRS315 (C-empty). The appropriate dual luciferase reporter plasmids were introduced into cells of obtained transformants. The transformants carrying plasmid pairs were grown in liquid C-Leu, Ura medium at 30°C and then readthrough levels were measured as described in Methods. The plasmid YEplac181-TEF5Δi causes a statistically significant decrease of UAA and UGA readthrough levels (P ≤ 0.02 and P ≤ 0.01, respectively) compared to those in transformants carrying YEplac181. Comparison of transformants bearing pRS315-SUP45 and pRS315 revealed statistically significant difference in readthrough of all stop codons: P ≤ 0.1, P ≤ 0.001 and P ≤ 0.05 for UAA, UGA and UAG codons, respectively.Back to article page