Figure 7.
Stop codon specificity of read-through in eRF1 N-domain mutants. The boxed panel shows as reference a summary of residues identified in previous studies. Cavities 1–3 refers to residues identified by Bertram et al. (4), pocket 1/2 to residues identified by Hatin et al. (6). The K and S residues of the TASNIKS motif, and the C124 residue identified by Fan-Minogue et al. (5), are also shown. The other three panels show the same view of the eRF1 N-domain, with residues mutated in this study shown in spacefill and colour coded according to the level of stop codon read-through observed. Residues of mutants conferring strong UGA-specific read-through are indicated.