Latent-transforming growth factor beta-binding protein 1 (LTBP1)

Key regulator of transforming growth factor beta (TGFB1, TGFB2 and TGFB3) that controls TGF-beta activation by maintaining it in a latent condition during storage in extracellular space (PubMed:2022183, PubMed:8617200, PubMed:8939931). Associates especially via disulfide bonds with the Latency-associated peptide (LAP), that's the regulatory chain of TGF-beta, also modulates integrin-dependent activation of TGF-beta (PubMed:8617200, PubMed:8939931, PubMed:15184403).

Outcompeted by LRRC32/GARP for binding to LAP regulatory chain of TGF-beta (PubMed:22278742). .