Regulates cubitus interruptus (ci) processing by recruiting multiple kinases to promote its efficient phosphorylation. Scaffolds multiple kinases and ci into proximity to promote its hyperphosphorylation, which then targets it for SCFSlimb/proteasome-mediated processing to generate its repressor form. Hh signaling inhibits ci phosphorylation by interfering with the cos-ci-kinases complex formation. Negatively regulates hh-signaling pathways during various processes, including photoreceptor differentiation (PubMed:25639794, PubMed:27195754). May negatively regulate a hh-signaling pathway which functions in the intestinal immune response to bacterial uracil by activating the Duox-dependent production of reactive oxygen species (ROS) (PubMed:25639794). Homodimer (Potential). Binds microtubules. Interacts with ci, smo, sgg, CkIalpha and protein kinase A catalytic subunit (PubMed:15691767, PubMed:9244298). Interacts (via kinesin motor domain) with Ubr3 (PubMed:27195754). Present at high levels during the first 4 hours of embryogenesis and at moderate levels between 4-12 hours. Polyubiquitinated by Ubr3, which leads to proteasomal degradation. RNAi-mediated knockdown results in the increased expression of reactive oxygen species (ROS) in the gut of 7 day old conventionally reared adult flies. No increased ROS expression in germ-free adults and in response to bacteria-derived uracil. Belongs to the TRAFAC class myosin-kinesin ATPase superfamily. Kinesin family. KIF27 subfamily.