Folding screening assayed by proteolysis: application to various cystine deletion mutants of vascular endothelial growth factor

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Item Type:	Article
Title:	Folding screening assayed by proteolysis: application to various cystine deletion mutants of vascular endothelial growth factor
Creators Name:	Heiring, C. and Muller, Y.A.
Abstract:	The production of recombinant proteins in Escherichia coli often leads to the formation of inclusion bodies. Although this has a number of advantages, a major disadvantage is the need to develop folding protocols for the renaturing of the proteins. However, the systematic screening of folding conditions is often hampered by the lack of convenient assays to detect correctly folded proteins. To address this problem we present a simple protocol, which combines folding screens and limited proteolysis to rapidly assess and optimize folding conditions. The efficacy of this method, termed Fsap (folding screening assayed by proteolysis), is demonstrated by the large-scale folding, purification and crystallization of various cystine deletion mutants of the cystine knot family member: vascular endothelial growth factor (vegf). These mutants are particularly difficult to fold as the cystine knot is believed to make major contributions to the stability of the protein and this family of proteins lacks extensive hydrophobic core regions.
Keywords:	Cystine Knot Growth Factor Family, Inclusion Bodies, Proteolysis, Renaturing, Screening
Source:	Protein Engineering
ISSN:	0269-2139
Publisher:	Oxford University Press
Volume:	14
Number:	3
Page Range:	183-188
Date:	1 January 2001
Official Publication:	http://peds.oxfordjournals.org/cgi/content/abstract/14/3/183
PubMed:	View item in PubMed

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