Probable plus end-directed motor protein that functions in the NACK-PQR (ANP3-MKK6-MPK4) MAP kinase signaling pathway, which is essential for somatic cell cytokinesis, especially for the cell-plate formation and its expansion. May regulate the activity and the localization of ANP3, probably by association through the non-catalytic region of the kinase. Functionally redundant with NACK1 and essential to promote the progression of cytokinesis and for cellularization (formation of the cell plate) during microgametogenesis and megagametogenesis. Interacts with ANP3 (PubMed:21575092). Interacts with TIO/FU (PubMed:24146312). Expressed in roots, stems, flowers, pollen mother cells and embryos. Enlarged pollen grains containing four vegetative nuclei and up to eight sperm cells. Short siliques with low fertility. Belongs to the TRAFAC class myosin-kinesin ATPase superfamily. Kinesin family. KIN-7 subfamily. Truncated N-terminus. Truncated N-terminus. Truncated N-terminus. Truncated N-terminus.