Latent Transforming Growth Factor Beta Binding Protein 2 (LTBP2)

LTBP2 belongs to the family of latent transforming growth factor (TGF)-beta binding proteins (LTBP), which are extracellular matrix proteins with multi-domain structure. This protein is the largest member of the LTBP family possessing unique regions and with most similarity to the fibrillins. It has thus been suggested that it may have multiple functions: as a member of the TGF-beta latent complex, as a structural component of microfibrils, and a role in cell adhesion.LTBP2 has approximately 45% amino acid identity to LTBP1 and 25% identity to fibrillin-1 (FBN1) but unlike other LTBP family members does not bind to latent forms of TGFB. The C-terminal region of LTBP2 competes with LTBP1 for specific binding to the N-terminal region of FBN1, but not FBN2 , in microfibrils.