Efficient recovery of secretory recombinant proteins from protease negative mutant Escherichia coli strains

Si Jae Park, Sang Yup Lee

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Osmotic shock and lysozyme/EDTA methods were used to recover secreted recombinant proteins from protease negative mutant strains of E. coli. Up to 80% of protein A-β-lactamase fusion protein was recovered from protease negative mutants by simple osmotic shock. Fractionation by lysozyme/EDTA treatment, increased the recovery of protein A-β-lactamase fusion protein from the mutant strain up to 93%. Mild fractionation condition allowed efficient recovery of secreted protein from protease negative mutant strains, but not from the parent strain possessing proteases.

Original languageEnglish
Pages (from-to)815-818
Number of pages4
JournalBiotechnology Techniques
Volume12
Issue number11
DOIs
StatePublished - 1998

Keywords

  • Lysozyme/EDTA treatment
  • Osmotic shock
  • Protease negative mutant E. coli
  • Protein A-β-lactamase fusion protein

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