A 5′-terminal phosphate is required for stable ternary complex formation and translation of leaderless mRNA in Escherichia coli

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FIGURE 5.
FIGURE 5.

Primer extension inhibition (toeprint) analysis of 30S subunit binding to LL cI-lacZ mRNA with a 5′-triphosphate (lanes 1–6), a 5′-monophosphate (lanes 7–12), or a 5′-hydroxyl (lanes 13–18). Lanes 1, 7, and 13 exclude 30S subunits, and lanes 2, 8, and 14 exclude tRNAfMet (1 μM when included). (Lanes 3,9,15) 30S subunit concentration (88 nM) is twofold higher than mRNA (44 nM) concentration. (Lanes 4,10,16) 30S subunit concentration (264 nM) is sixfold higher than mRNA concentration. (Lanes 5,11,17) 30S subunit concentration (528 nM) is 12-fold higher than RNA concentration. (Lanes 2,6,8,12,14,18) 30S subunit concentration (792 nM) is 18-fold higher than mRNA concentration. The position of the toeprint signal is identified by an arrow.

This Article

  1. Published in Advance January 30, 2012, doi: 10.1261/rna.027698.111 RNA 18: 508-518

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