Microtubule shuttles on kinesin-coated glass micro-wire tracks
  Gliding of microtubule filaments on surfaces coated with the motor protein kinesin has potential applications for nano-scale devices. The ability to guide the gliding direction in three dimensions allows the fabrication of tracks of arbitrary geometry in space. Here, we achieve this by using kinesin-coated glass wires of micrometer diameter range. Unlike previous methods in which the guiding tracks are fixed on flat two-dimensional surfaces, the flexibility of glass wires in shape and size facilitates building in-vitro devices that have deformable tracks. 
Kyongwan Kim, Andrew L. Liao, Aurelien Sikora, Daniel Oliveira, Hikaru   Nakazawa, Mitsuo Umetsu, Izumi Kumagai, Tadafumi Ad...
q-bio.BM physics.bio-ph