Component of the centralspindlin complex that serves as a microtubule-dependent and Rho-mediated signaling required for the myosin contractile ring formation during the cell cycle cytokinesis. Essential for cytokinesis in Rho-mediated signaling. Required for the localization of ECT2 to the central spindle. Plus-end-directed motor enzyme that moves antiparallel microtubules in vitro. Heterotetramer of two molecules each of RACGAP1 and KIF23. Found in the centralspindlin complex. Interacts with RACGAP1; the interaction is direct. Interacts with ECT2 and PRC1. Interacts with ANXA11 during cytokinesis. Interacts with BIRC6/bruce and USP8/UBPY. Interacts with ARF6, forming heterodimers and heterotetramers. Localizes to the interzone of mitotic spindles. Detected at the midbody during later stages of mitotic cytokinesis. Ubiquitinated. Deubiquitinated by USP8/UBPY. Belongs to the TRAFAC class myosin-kinesin ATPase superfamily. Kinesin family.