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. 2019 Jan 3;8:e40063. doi: 10.7554/eLife.40063

Figure 5. SatS and SapM interact.

(A) Lysate from M. smegmatissecA2/∆satS expressing SapM-FLAG and either SatSMtb-HA or SatSMtb without a tag, ∆satS expressing ∆ss-SapM-FLAG and SatSMtb-HA, or mc2155 with two empty vectors (as shown above the blot) were used for co-immunoprecipitation using anti-HA conjugated beads. Lysates (left) and immunoprecipitations (right) for each strain were probed with SatS antibody and FLAG antibody for SapM. Two different sizes of SapM-FLAG corresponding to the full-length (signal sequence-containing) and mature (cleaved signal sequence) species were detected. (B) Lysate from M. smegmatissatS expressing SapM-FLAG and either SatSMtb-HA or SatSMtb without a tag were used for co-immunoprecipitation using anti-HA conjugated beads. Lysates (left) and co-immunoprecipitations (right) for each strain were probed with SatS antibody, FLAG antibody, and MspA antibody. All data are representative of at least three independent experiments.

Figure 5.

Figure 5—figure supplement 1. Epitope tags do not disrupt SapM or SatS functions.

Figure 5—figure supplement 1.

(A) Whole cell phosphatase activity assay of M. smegmatis strains expressing SapM-FLAG or an empty vector. The error bars represent standard deviation from the mean of three independent replicates. *, p<0.05; ***, p<0.001; ****, p<0.0001 by ANOVA. (B) Equal protein levels from whole cell lysates and culture supernatants of mc2155, ∆satS, and the HA-tagged complemented strain (∆satS +psatS HA) were examined for levels of SapM-FLAG and GroEL by Immunoblot.