May be involved in cooperative interactions with calmodulins or calmodulin-like proteins (By similarity). Recruits calmodulin proteins to microtubules, thus being a potential scaffold in cellular signaling and trafficking (PubMed:28115582). Regulates cell shape and elongation in aerial organs (i.e. epidermis pavement cells) probably by regulating cortical microtubules (MT) arrays orientation (PubMed:28115582). May associate with nucleic acids and regulate gene expression at the transcriptional or post-transcriptional level (By similarity). Binds to multiple calmodulin (CaM) in the presence of Ca(2+) and CaM-like proteins. Expressed in hypocotyls, cotyledons, leaves and petioles. Belongs to the IQD family.