Dichotomy in the laminin-binding properties of soluble and membrane-bound human galactoside-binding protein.
Recent studies indicate that galactoside-binding proteins may bind the poly-N-acetyllactosamine sequences of laminin. We questioned whether human galactoside-binding protein (hL-31) binds to laminin and whether cells that express hL-31 on their surface use it as a laminin receptor to promote cellular attachment. The data show that both lectin and cells bind to immobilized laminin. The binding of soluble lectin to laminin is inhibited by lactose, while cell adhesion to it is not. The results indicate that laminin may be a ligand for soluble galactoside-binding proteins.
Ochieng
J
J
Metastasis Program, Michigan Cancer Foundation, Detroit 48201.
Gerold
M
M
Raz
A
A
D001665:Binding Sites; D002448:Cell Adhesion; D002460:Cell Line; D002462:Cell Membrane / Q000378:metabolism; D003600:Cytosol / Q000378:metabolism; D005455:Fluorescent Antibody Technique; D005697:Galactosides / Q000378:metabolism; D037161:Galectins; D006388:Hemagglutinins / Q000032:analysis / Q000378:metabolism*; D006801:Humans; D015151:Immunoblotting; D007700:Kinetics; D007797:Laminin / Q000032:analysis / Q000378:metabolism*
D005697:Galactosides; D037161:Galectins; D006388:Hemagglutinins; D007797:Laminin