A modular polycistronic expression system for overexpressing protein complexes in Escherichia coli - PubMed (original) (raw)
A modular polycistronic expression system for overexpressing protein complexes in Escherichia coli
S Tan. Protein Expr Purif. 2001 Feb.
Abstract
To facilitate studies of multicomponent protein complexes, I have developed an Escherichia coli expression system which coexpresses up to four polypeptides from a single plasmid. The modular nature of the system enables efficient subcloning of a gene into each of the 4 cassettes in the polycistronic expression vector. Restriction sites present in the polycistronic expression vector allow both affinity tagged and untagged complexes to be overexpressed. I demonstrate successful use of the expression system for binary and ternary complexes, including the reconstitution of the VHL-elonginC-elonginB complex in E. coli and purification of the complex by affinity and ion-exchange chromatography. This polycistronic expression system should provide an important alternative to in vitro reconstitution of multicomponent complexes.
Copyright 2001 Academic Press.
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