Method for refolding insoluble, misfolded insulin-like growth factor-1 into an active conformation

摘要

A method for refolding insoluble, improperly folded IGF-I is provided, wherein the IGF-I, precipitated from prokaryotic host cells, is concurrently solubilized, unfolded, and refolded into a biologically active conformation in a single buffer. The buffer contains reducing agent and chaotropic agent to solubilize the IGF-I at concentrations sufficiently low to allow solubilization and refolding to occur. Also provided is a triple-protease deficient E. coli host suitable for use in the process.