Calcium-binding regulatory protein that interacts with kinesin motor protein KCBP in a calcium-dependent manner. Inhibits KCBP microtubule binding activity and microtubule-stimulated ATPase activity. Involved in the regulation of trichome branching through its interaction with KCBP. Interacts with KCBP (via C-terminus). KIC and calmodulin show competitive binding to KCBP. Interacts with CML42. Binds to ABCG36 (PubMed:26315018). Expressed in stems, leaves and flowers. Plants overexpressing KIC1 causes a reduction in the number of trichome branches. Truncated N-terminus.