Here, we report that FRB–FKBP forms a rotationally symmetric trimer in crystals, but a larger oligomer in solution, primarily tetramers and pentamers, which maintain similar inter-subunit contacts as in the crystal trimer. These findings expand the applications of the FRB–FKBP oligomerization ...
Fusion proteins containing FRB and FKBP formed oligomers on adding rapamycin.•Various oligomers were generated by adjusting the configuration of fusion proteins.•FRB–FKBP fusion protein without a linker (FR–FK) specifically formed a tetramer.•Proteins fused to FR–FK also formed a tetramer....
In this study, we showed that fusion proteins comprising the induced heterodimer formation proteins FRB and FKBP formed various oligomers upon addition of rapamycin. By adjusting the configuration of fusion proteins, we succeeded in generating an inducible tetramer formation system. Proteins of interest ...
Fusion proteins containing FRB and FKBP formed oligomers on adding rapamycin.•Various oligomers were generated by adjusting the configuration of fusion proteins.•FRB–FKBP fusion protein without a linker (FR–FK) specifically formed a tetramer.•Proteins fused to FR–FK also formed a tetramer....