FIGURE 2:
The C-termini of Hhp1/2 are dispensable for their functions. (A) Schematic diagrams of Hhp1/2 with relative positions of N-terminal extensions (N, green), kinase domains (blue), kinase domain extensions (KDE, yellow), and unrelated C-termini in red or purple indicated, drawn to scale. (B) Anti-GFP immunoblots of whole-cell extracts prepared from untagged and the indicated GFP-tagged strains. Anti-PSTAIRE (Cdc2) immunoblots served as protein loading controls. (C) Live-cell imaging of endogenously tagged Hhp1-(1-296)-GFP and Hhp2-(1-295)-GFP with Sid4-RFP. Scale bars: 5 µm. (D) Serial 10-fold dilutions of the indicated strains were spotted on YE plates and incubated at the indicated temperatures. (E) In vitro kinase assays of recombinant MBP-Hhp1, MBP-Hhp1-(1-296), MBP-Hhp2, and MBP-Hhp2-(1-295) detected by Coomassie blue (CB) staining of SDS–PAGE gels, with casein as substrate. Phosphorylated casein was detected by autoradiography (32P). (F) Sid4 from the indicated strains was immunoprecipitated from denatured cell lysates, treated with phosphatase, and visualized by immunoblotting.