Membrane-anchored myosin receptors that define a distinct, plant-specific transport vesicle compartment. Interacts with myosin XI-K. The GTD-binding domain is sufficient for myosin binding. No visible phenotype. Myob1, myob2 and myob3 triple mutant has a significant height reduction and a delayed flowering. Myob1, myob2, myob3 and myob4 quadruple mutant has a significant height reduction, a reduced rosette diameter and a delayed flowering.