A fast and simple method to eliminate Cpn60 from functional recombinant proteins produced by E. coli Arctic Express

Protein Expr Purif. 2015 May:109:29-34. doi: 10.1016/j.pep.2015.01.009. Epub 2015 Feb 3.

Abstract

A frequent problem of recombinant protein production is their insolubility. To address this issue, engineered Escherichiacoli strains like Arctic Express that produce an exogenous chaperone facilitating protein folding, have been designed. A drawback is the frequent contamination of the protein by chaperones. A simple method, using urea at a sub-denaturing concentration, allows unbinding of Cpn60 from expressed protein. This method was successfully used to purify 2 proteins, an enzyme and a viral protein. The enzyme was fully active. The nature of interaction forces between enzyme and Cpn60 was investigated. The method is likely applicable to purify other proteins.

Keywords: Arctic Express; Cpn60; IMAC; Recombinant protein.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biochemistry / methods*
  • Chaperonin 60 / metabolism*
  • Dynamic Light Scattering
  • Electrophoresis, Polyacrylamide Gel
  • Escherichia coli / metabolism*
  • Genetic Engineering*
  • Kinetics
  • Recombinant Proteins / metabolism*

Substances

  • Chaperonin 60
  • Recombinant Proteins