Microtubule-dependent motor protein involved in the control of the oriented deposition of cellulose microfibrils. Homodimer. Composed of an N-terminal domain which is responsible for the motor activity of kinesin (it hydrolyzes ATP and binds microtubule) and a central to C-terminal alpha-helical coiled coil domain that mediates the heavy chain dimerization. Belongs to the TRAFAC class myosin-kinesin ATPase superfamily. Kinesin family. KIN-4 subfamily. Was originally thought to correspond to two different genes Os02g0742800 and Os02g0742900. Was originally thought to correspond to two different genes Os02g0742800 and Os02g0742900. Was originally thought to correspond to two different genes Os02g0742800 and Os02g0742900. Was originally thought to correspond to two different genes Os02g0742800 and Os02g0742900.