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Poly-Histidine-Tagged Protein Purification Using Immobilized Metal Affinity Chromatography (IMAC).

Sinéad T Loughran1, Ronan T Bree2, Dermot Walls3

  • 1Department of Life and Health Sciences, School of Health and Science, Dundalk Institute of Technology, Dundalk, Louth, Ireland. sinead.loughran@dkit.ie.

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|August 30, 2023
PubMed
Summary
This summary is machine-generated.

Purify recombinant proteins using poly-histidine tags (His-tags) and immobilized metal affinity chromatography (IMAC). This method efficiently isolates highly purified His-tagged proteins from E. coli under native or denaturing conditions.

Keywords:
6xHistidineAffinity chromatographyIMACNi-NTAPolyhistidineProtein purification

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Protein Purification

Background:

  • Poly-histidine tagging (His-tagging) is a widely adopted technique for recombinant protein purification.
  • His-tags facilitate protein isolation via immobilized metal affinity chromatography (IMAC).

Purpose of the Study:

  • To describe efficient procedures for purifying His-tagged proteins from Escherichia coli.
  • To detail the application of IMAC using a bind-wash-elute strategy.

Main Methods:

  • Engineering recombinant DNA to add His-tags to target proteins.
  • Utilizing immobilized metal affinity chromatography (IMAC) for protein purification.
  • Implementing a bind-wash-elute strategy for His-tagged proteins.

Main Results:

  • Successful isolation of highly purified His-tagged target proteins.
  • Demonstration of efficient purification procedures.
  • Adaptability of the method for both native and denaturing conditions.

Conclusions:

  • His-tagging combined with IMAC provides a versatile and efficient method for recombinant protein purification.
  • The described procedures enable high-purity isolation of His-tagged proteins from E. coli.
  • The protocol is effective under both native and denaturing conditions, enhancing its applicability.