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Non-chromatographic Purification of Recombinant Elastin-like Polypeptides and their Fusions with Peptides and Proteins from Escherichia coli
Published on: June 9, 2014
An improved nonchromatographic method for the purification of recombinant proteins using elastin-like
Dongming Lan1, Guangrui Huang, Hongwei Shao
1State Key Laboratory of Biocontrol, Guangdong Province Key Laboratory of Therapeutic Functional Genes, College of Life Sciences, Sun Yat-sen University, Guangdong 510275, People's Republic of China.
Abstract:
Proteins fused to the elastin-like polypeptide (ELP) tag can be selectively separated from crude cell extract without chromatography. To avoid the interference of the ELP tag on properties of the target protein, it is necessary to remove the ELP tag from target protein by protease digestion. Therefore, an additional chromatographic purification step is required to remove the proteases, and this is time- and labor-consuming. Here we demonstrate the utility of the ELP-tagged proteases for cleavage of ELP fusion proteins, allowing one-step removal of the cleaved ELP tag and ELP-tagged proteases without chromatography.

