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. 2014 Feb;20(2):214–227. doi: 10.1261/rna.042341.113

FIGURE 5.

FIGURE 5.

E3L inhibition of PKR in yeast is independent of Z-DNA binding activity. (A) Transformants of yeast strains J110 (−PKR) and H2544 (+PKR) bearing empty vector pEMBLyex4 or plasmids expressing the indicated N-terminally HA-tagged E3L derivatives under the control of the GAL–CYC1 promoter were grown to saturation, and 5 µL of serial dilutions (of OD600 = 1.0, 0.1, 0.01, and 0.001) was spotted on SCGal (10% galactose) medium and incubated for 3 d at 30°C. (B) Transformants of H2544 (+PKR) from panel A were grown in SD medium at 30°C until OD ∼ 0.6, then shifted to SCGal medium for 2 h. WCEs were fractionated by SDS-PAGE and subjected to immunoblot analysis using monoclonal antibodies against the HA epitope to detect HA-tagged E3L (upper panel) and polyclonal antisera against yeast eIF2α (lower panel).