title: Soluble 80-kd fragment of cell-CAM 120/80 disrupts cell-cell adhesion.
abstract: Calcium-dependent cell adhesion molecules (CAMs) mediate intercellular adhesion in epithelial cells and in preimplantation mammalian embryos. One of these molecules, cell-CAM 120/80, is found on cells as a 120-kd membrane glycoprotein and as a soluble 80-kd species in conditioned culture medium [Damsky et al: Cell 34:455, 1983]. We have purified to homogeneity the soluble 80-kd fragment of cell-CAM 120/80 by using monoclonal antibody affinity chromatography. We have shown that the purified molecule can disrupt cell-cell adhesion in cultured epithelial cells, thus indicating that it is directly involved in the adhesive process. In addition, we have further characterized both the 120-kd cell-associated molecule and its 80-kd fragment, including N-terminal sequence analysis.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000911:Antibodies, Monoclonal; D000954:Antigens, Surface / Q000302:isolation & purification*; D002448:Cell Adhesion; D015815:Cell Adhesion Molecules; D002460:Cell Line; D002462:Cell Membrane / Q000276:immunology; D002846:Chromatography, Affinity; D006801:Humans; D008970:Molecular Weight; D012995:Solubility
chemical_list: D000911:Antibodies, Monoclonal; D000954:Antigens, Surface; D015815:Cell Adhesion Molecules