PMID: 8937990Nov 1, 1996Paper

Dual functions of transglutaminase in novel cell adhesion

Journal of Cell Science
S UekiY Saito

Abstract

Transglutaminases (TGases) are enzymes which catalyze cross-link formation between glutamine residues and lysine residues in substrate proteins. In the present study, we report for the first time that a representative enzyme, blood coagulation factor XIIIa (FXIIIa), is capable of mediating adhesion of various cells. When coated on plastic surfaces FXIIIa promoted adhesion and spreading of various cells of both normal and tumor origin, in a concentration-dependent manner. The adhesion was not inhibited by antibodies against possible contaminants in the enzyme preparation such as fibronectin and vitronectin, but was completely inhibited by a polyclonal antibody against the enzyme. Therefore, if there were any contaminating cell adhesive substrates in the enzyme preparation, they cannot account for the observed cell adhesion to the enzyme; FXIIIa itself mediates the cell adhesion. Furthermore, phosphorylation of tyrosine residues in 120 kDa and 70 kDa proteins was clearly shown in human fibroblasts adhering to the enzyme. Formation of actin stress fibers was also unambiguously observed in the adhering cells. These biochemical reactions, which are also observed when cells adhere to a typical cell adhesion protein, fibronectin, are ...Continue Reading

Related Concepts

Related Feeds

Adhesion Molecules in Health and Disease

Cell adhesion molecules are a subset of cell adhesion proteins located on the cell surface involved in binding with other cells or with the extracellular matrix in the process called cell adhesion. In essence, cell adhesion molecules help cells stick to each other and to their surroundings. Cell adhesion is a crucial component in maintaining tissue structure and function. Discover the latest research on adhesion molecule and their role in health and disease here.