Seems to mediate adhesion by cell surface integrin binding. May serve as a communication link between the dermal fibroblast cell surface and its extracellular matrix environment. Enhances TGFB1 activity. Inhibits cell proliferation (By similarity). Accelerates collagen fibril formation, and stabilizes collagen fibrils against low-temperature dissociation. Interacts with TGFB1, DCN and collagen. Detected in skin, skeletal muscle, heart, lung, articular cartilage, long bone and calvaria. Smaller amounts detected in kidney. Not detected in brain, liver or spleen. Sulfated on tyrosine residue(s). Allele T1. Allele T2. Allele T3. Allele T4. Allele T5. Five alleles occur, which differ in mass and pI (T1, T2, T3, T4 and T5). Belongs to the dermatopontin family.