Kinesin motors driven microtubule swarming triggered by UV light

We report the swarming of microtubules driven by the biomolecular motor kinesin and dissociation of microtubule swarms under UV and visible light irradiation, respectively. We introduced para tert-butyl-substituted azobenzene, a photoresponsive molecule, to the backbone of single strand DNA, which functions as a photoswitch. Due to the photoswitch, the swarming of DNA-conjugated microtubules was controlled and reversible regulation of microtubule swarming was achieved in a repeated manner upon alternate irradiation with UV and visible light. This reversible swarming of microtubules could provide new opportunities for designing complex swarming systems with the ability of multitasking, expediting the development of molecular machines.