Matrix-assisted refolding of autoprotease fusion proteins on an ion exchange column: A kinetic investigation |
| |
Authors: | Elisabeth Schmoeger Martin Wellhoefer Astrid Dürauer Alois Jungbauer Rainer Hahn |
| |
Institution: | 1. Department of Biotechnology, University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190 Vienna, Austria;2. Austrian Centre of Industrial Biotechnology, Muthgasse 18, 1190 Vienna, Austria |
| |
Abstract: | Matrix-assisted refolding is an excellent technique for performing refolding of recombinant proteins at high concentration because aggregation during refolding is partially suppressed. The autoprotease Npro and its engineered mutant EDDIE can be efficiently refolded on cation-exchangers. In the current work, denatured fusion proteins were loaded at different column saturations (5 and 50 mg mL−1 gel), and refolding and self-cleavage were initiated during elution. The contact time of the protein with the matrix significantly influenced the refolding rate and yield. On POROS 50 HS, the refolding rate was comparable to a batch refolding process, but yield was substantially higher; at a protein concentration of 1.55 mg mL−1, an almost complete conversion was observed. With Capto S, the rate of self-cleavage increased by a factor of 20 while yield was slightly reduced. Processing the autoprotease fusion protein on Capto S at a high protein loading of 50 mg mL−1 gel and short contact time (0.5 h) yielded the highest productivity. |
| |
Keywords: | Refolding Ion exchange chromatography Autoprotease Cleavage Productivity |
本文献已被 ScienceDirect 等数据库收录! |
|