Millimeter scale alignment of magnetic nanoparticle functionalized microtubules in magnetic fields.
The conjugation of 14 nm diameter CoFe2O4 nanoparticles to the surface of biotinylated microtubules enables their manipulation with externally applied magnetic fields of small, permanent NdFeB magnets. Microtubules are selectively patterned on kinesin motor-modified glass surfaces in coparallel arrays that mimic the orientation of the magnetic field lines over millimeter distances. The magnetic field is simultaneously used to increase surface loading of microtubules. We demonstrate that motility across the kinesin motor surface is retained following magnetic functionalization of the microtubules, while gliding speed is dependent on loading level of the neutravidin linker as well as magnetic nanoparticles.
Platt
Mark
M
Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
Muthukrishnan
Gayatri
G
Hancock
William O
WO
Williams
Mary Elizabeth
ME
D000818:Animals; D003035:Cobalt / Q000737:chemistry*; D029721:Drosophila Proteins / Q000737:chemistry; D005290:Ferric Compounds / Q000737:chemistry*; D016547:Kinesins / Q000737:chemistry; D008280:Magnetics; D008870:Microtubules / Q000737:chemistry / Q000502:physiology / Q000648:ultrastructure*; D049329:Nanostructures / Q000737:chemistry*
D029721:Drosophila Proteins; D005290:Ferric Compounds; D003035:Cobalt; D016547:Kinesins