Abstract
Recombinant human procollagen C-proteinase enhancer (rPCPE) was expressed using a baculovirus system and purified to homogeneity using a three-step procedure including heparin affinity chromatography. Heparin binding was dependent on the C-terminal netrin-like domain. The recombinant protein was found to be active, increasing the activity of procollagen C-proteinase/bone morphogenetic protein-1 on type I procollagen in a manner comparable to the native protein. Enhancing activity was dependent on intact disulfide bonding within the protein. By circular dichroism, the observed secondary structure of rPCPE was consistent with the known three-dimensional structures of proteins containing homologous domains.
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