Download MendeleyCompetition between Coiled-Coil Structures and the Impact on Myosin-10 Bundle Selection
Vavra, K.C., Xia, Y., Rock, R.S.(2016) Biophys J 110: 2517-2527
- PubMed: 27276269
- DOI: https://doi.org/10.1016/j.bpj.2016.04.048
- Primary Citation of Related Structures:
2N9B - PubMed Abstract:
Coiled-coil fusions are a useful approach to enforce dimerization in protein engineering. However, the final structures of coiled-coil fusion proteins have received relatively little attention. Here, we determine the structural outcome of adjacent parallel and antiparallel coiled coils. The targets are coiled coils that stabilize myosin-10 in single-molecule biophysical studies. We reveal the solution structure of a short, antiparallel, myosin-10 coiled-coil fused to the parallel GCN4-p1 coiled coil. Surprisingly, this structure is a continuous, antiparallel coiled coil where GCN4-p1 pairs with myosin-10 rather than itself. We also show that longer myosin-10 segments in these parallel/antiparallel fusions are dynamic and do not fold cooperatively. Our data resolve conflicting results on myosin-10 selection of actin filament bundles, demonstrating the importance of understanding coiled-coil orientation and stability.
Organizational Affiliation:
Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, Illinois.
