Involved in growth and development through its role in cytokinesis and polarized cell expansion (PubMed:12874123). Required for plasma membrane internalization. May function in clathrin-mediated membrane trafficking, including plasma membrane endocytosis, essential to both cytokinesis and cell expansion (PubMed:24179130). Acts as a negative regulator of basal resistance against bacteria (PubMed:20472560). Interacts with FLS2. Colocalized with clathrin at the plasma membrane. A number of isoforms are reduced. According to EST sequences. Expressed in roots, rosette and cauline leaves, buds and flowers. Defects in seedling development, root elongation, leaf expansion, flower morphogenesis and fertility due to defective cytokinesis in epidermal cells. Was originally thought to correspond to two different genes. Was originally thought to correspond to two different genes.