Transglutaminases (TGM) are a family of structurally and functionally related Ca2+-dependent enzymes (TGases) that stabilize protein assemblies through the formation of gamma-glutamyl-epsilon lysine crosslinks. TGases influence numerous biological processes, including blood coagulation, cell differentiation, fertilization and apoptosis. TGM5 belongs to the transglutaminase superfamily and catalyzes the cross-linking of proteins between glutamine and lysine residues, often resulting in stabilization of protein assemblies. TGM5 is also expressed in the human hair follicle. Defects in TGM5 are associated with acral peeling skin syndrome.Synonyms: Protein-glutamine gamma-glutamyltransferase 5, TGMX, TGX, TGase 5, TGase X, Transglutaminase X