SigT is degraded dependent on ClpP/SsrA during cell differentiation.
A–C, ClpP protease is required for SigT degradation during cell differentiation. SigT protein dynamics of strains M145/pL86 (wild type + 3flag-sigT) and L45/pL86 (ΔclpP + 3flag-sigT) on R2YE medium covered with cellophane (A and B) or in a liquid R5-medium (C) for the times indicated as demonstrated by Western blot. Coomassie Blue staining of total protein served as a loading control. Spores of strains M145 (wild type, WT), M145/pL86 (WT + sigT) L45 (ΔclpP), L43 (ΔrstAΔclpP), L45/pL86 (ΔclpP + sigT), and L43/pL86 (ΔrstAΔclpP + sigT) were streaked on R2YE medium for 32 (D) or 45 h (E), respectively, and photographed. F, spores of strains M145 (wild type, WT), LM22 (ΔrstA), L45 (ΔclpP), and L43 (ΔrstAΔclpP) were streaked on R2YE medium for 60 h and photographed.