Figure 5. Destabilizing Domains Confer Shld1-Dependent Stability to a Transmembrane Protein.
FKBP mutants D100G and L106P were fused to the C terminus of CD8α, and NIH3T3 cells stably expressing the fusions were split into three pools. The first population (−) was mock-treated and the second population (+) was treated with 1 mM Shld1 for 24 hr. The third population (+/−) was treated with 1 mM Shld1 for 24 hr, then washed with media and cultured for 24 hr in the absence of Shld1. Live cells were then probed with a FITC-conjugated anti-CD8a antibody and assayed by flow cytometry. Data are presented as the average mean fluorescence intensity ± SEM from an experiment performed in triplicate.
