May be involved in the assembly, secretion and targeting of TGFB1 to sites at which it is stored and/or activated. May play critical roles in controlling and directing the activity of TGFB1. May have a structural role in the extra cellular matrix (ECM).
Specificity
Natural and recombinant Human Latent-transforming growth factor beta-binding protein 4
Forms part of the large latent transforming growth factor beta precursor complex; removal is essential for activation of complex. Interacts with LTBP1 and TGFB1. Binds to FBN1.