Enables glycosphingolipid binding activity. An extracellular matrix structural constituent. Involved in protein phosphorylation. Acts upstream of or within several processes, including morphogenesis of an epithelium; neuron projection development; and retinal blood vessel morphogenesis. Located in basement membrane and cell-cell junction. Part of laminin-1 complex. Is expressed in several structures, including alimentary system; central nervous system; early conceptus; eye; and genitourinary system. Orthologous to human LAMA1 (laminin subunit alpha 1). [provided by Alliance of Genome Resources, Apr 2022]