part of collagen type VII trimer A collagen homotrimer of alpha1(VII) chains; type VII collagen triple helices form antiparallel dimer, which in turn associate laterally to form anchoring fibrils that connect type IV collagen in the basal lamina to plaques in the underlying connective tissue. It binds laminin. cellular_component GO:0005590 collagen anchoring fibril von-Willerbrand-factor-A-domain-rich collagen trimer extracellular protein-containing complex