Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
2021092 | Protein Expression and Purification | 2010 | 6 Pages |
Abstract
We have therefore established a protocol for the rapid high-level synthesis of recombinant human TNF-α in Escherichia coli shake-flask cultures and the subsequent purification of the mature protein. Using the advantages of SUMO-fusion technology we were able to produce protein with an authentic N-terminus in high yield. Two immobilized metal ion-affinity chromatography steps with a protease cleavage step in between and subsequent size-exclusion chromatography were utilized to purify the protein. The protein was obtained from the last chromatography step as a trimer, while purity was at least 96% as estimated by SDS-PAGE. The identity of the protein was confirmed by MALDI-TOF mass spectrometry. Recombinant mature TNF-α was correctly folded as assessed by CD spectroscopy and its biological activity was confirmed by an L929 cell assay.
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Authors
Andreas Hoffmann, Mathias Q. Müller, Manja Gloser, Andrea Sinz, Rainer Rudolph, Sven Pfeifer,