Binds EGFR, the EGF receptor, inducing EGFR autophosphorylation and the activation of downstream signaling pathways. May play a role in cell adhesion and migration. May function as a negative regulator of chondrocyte differentiation. In the olfactory epithelium, it may regulate glial cell migration, differentiation and the ability of glial cells to support neuronal neurite outgrowth (By similarity). Interacts with ECM1. Interacts with TIMP3. Localizes to the lamina propria underneath the olfactory epithelium. Mice are viable and have no overt phenotype at birth. However, they exhibit reduced reproductivity and an early onset of aging-associated phenotypes including reduced lifespan, decreased body mass, lordokyphosis, reduced hair growth and generalized fat, muscle and organ atrophy. They also display multiple hernias associated with a reduction of elastic fibers in facia, the thin layer of connective tissue maintaining and protecting structures throughout the body. However, there is no apparent macular degeneration. Belongs to the fibulin family.