Dcp2 phosphorylation is required for its interaction with Dhh1p during glucose deprivation. (A) Wild-type (WT; BY4742) strains were transformed with expression plasmid of Dhh1-GFP (pRP 1151; ) controlled by its own promoter and centromeric replication origin. Again, these strains were cotransformed with Flag-tagged wild-type (pRP983), S137A (pRP1676), or S137E (pRP1679) Dcp2 plasmids. Cells were grown in synthetic media to reach OD 600 of ∼0.5–0.6 with or without glucose deprivation for 10 min. Cell lysates were immunoprecipitated (IP) with anti-Flag antibody–conjugated beads, and copurified Dhh1p-GFP was detected with anti-GFP antibody after SDS-PAGE. (B) Wild-type or ste20Δ (yRP2547) strains was cotransformed with plasmids expressing Dhh1-GFP and plasmids expressing Flag-tagged wild-type or S137E Dcp2 as indicated. (C) Wild-type, ste20Δ, or dcp2Δ (yRP1358) strains were transformed with a plasmid expressing Dhh1-GFP, or in some cases, the dcp2Δ strain was cotransformed with plasmids expressing Dcp2-WT, S137A, or S137E as indicated. Dhh1 localization was examined with a microscope with or without stress. IB, immunoblot. Bar, 5 µm.