Predicted to enable integrin binding activity. Predicted to be involved in several processes, including axon guidance; basement membrane assembly; and substrate adhesion-dependent cell spreading. Predicted to act upstream of or within cell adhesion. Predicted to be located in basement membrane and extracellular region. Predicted to be part of laminin complex. Human ortholog(s) of this gene implicated in autistic disorder and lissencephaly 5. Orthologous to human LAMB1 (laminin subunit beta 1).