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Endostatin-like domain; the angiogenesis inhibitor endostatin is a C-terminal fragment of collagen XV/XVIII, a proteoglycan/collagen found in vessel walls and basement membranes; this domain has a compact globular fold similar to that of C-type lectins; endostatin XVIII is monomeric and contains a heparin-binding epitope and zinc binding sites while endostatin XV is trimeric and contains neither of these sites; the generation of endostatin or endostatin-like collagen XV/XVIII fragments is catalyzed by proteolytic enzymes within the protease-sensitive hinge region of the C-terminal domain; endostatin inhibits endothelial cell migration in vitro and appears to be highly effective in murine in vivo studies
Jiyao W et al.(2023). "The conserved domain database in 2023.",