Interacts (via C-terminus) with NEK5. Colocalizes with microtubules during interphase. Accumulated at the preprophase band in a cell cycle-dependent manner with a high expression during prophase that decreases after nuclear envelope breakdown. A number of isoforms are produced. According to EST sequences. Expressed in leaves, guard cells, trichomes, vascular tissues, stele of the root tip region and columella cells (PubMed:17971038). Highest expression detected in guard cells (PubMed:21387573). D-BOX motif functions as a recognition motif for the ubiquitination machinery. No visible phenotype. Belongs to the TRAFAC class myosin-kinesin ATPase superfamily. Kinesin family. Ungrouped subfamily.