Internal motor kinesin involved in trichome morphogenesis (PubMed:15574882). Participates in regulating the formation of Golgi-associated vesicles (PubMed:19939242). Plays a central role in microtubule disassembly via the active ARAC10-ICR5 cascade, which establishes the secondary cell wall pattern in metaxylem vessel cells (PubMed:24280391). Acts redundantly with KIN13B to modulate cell wall synthesis and cell expansion via the THE1 pathway (PubMed:25232944).
Localized to cortical microtubules in secondary wall pits when associated with ICR5. The N-terminal region of the protein is required for its localization at microtubules, but the truncated protein can be recruited to microtubules upon interaction with ICR5.
Expressed in leaves, roots, young and mature seedlings (PubMed:15574882, PubMed:19939242). Preferentially expressed in the secondary cell wall pits of differentiating metaxylem vessel cells (at the protein level) (PubMed:24280391).