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Related Concept Videos

Tagging and Fusion Proteins01:24

Tagging and Fusion Proteins

Proteins are involved in several cellular processes and biochemical reactions. Analyzing a specific protein of interest requires it to be isolated from the other proteins in the cell. This is achieved by overexpressing the specific gene in a suitable host to produce large quantities of the target protein. A tag or label is recombined with the gene to produce a fusion protein containing the target protein and the tag. The tags on these fusion proteins can then be used for easy detection and...

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Related Experiment Video

Updated: Jul 7, 2026

Generation of Plasmid Vectors Expressing FLAG-tagged Proteins Under the Regulation of Human Elongation Factor-1α Promoter Using Gibson Assembly
10:18

Generation of Plasmid Vectors Expressing FLAG-tagged Proteins Under the Regulation of Human Elongation Factor-1α Promoter Using Gibson Assembly

Published on: February 9, 2015

Introduction to expression by fusion protein vectors.

P Riggs1, E R La Vallie, J M McCoy

  • 1New England Biolabs, Beverly, Massachusetts, USA.

Current Protocols in Molecular Biology
|February 12, 2008
PubMed
Summary
This summary is machine-generated.

Creating fusion proteins for expression involves optimizing translation signals and codon usage. Gene fusion strategies, using carrier sequences, simplify expression and purification of target proteins.

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Last Updated: Jul 7, 2026

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Area of Science:

  • Molecular Biology
  • Protein Expression
  • Biotechnology

Background:

  • Efficient protein expression requires specific genetic elements like promoters and start codons.
  • mRNA secondary structures can impede translation initiation.
  • Codon preferences and coding sequence characteristics influence protein expression levels.

Purpose of the Study:

  • To discuss challenges in creating and manipulating expression vectors for fusion proteins.
  • To present gene fusion as a strategy to overcome expression hurdles.
  • To highlight the utility of carrier proteins in enhancing expression and purification.

Main Methods:

  • Altering sequences preceding the start codon.
  • Modifying the 5' end of coding sequences without changing the protein.
  • Creating gene fusions by inserting a gene downstream of a carrier gene in an expression vector.

Main Results:

  • Gene fusions provide necessary signals for high-level protein expression.
  • Fusion proteins incorporate an N-terminal carrier protein region.
  • Carrier sequences facilitate protein purification through affinity binding or exploiting unique properties.

Conclusions:

  • Gene fusion is an effective method to optimize protein expression and simplify purification.
  • Carrier proteins offer versatile strategies for recombinant protein isolation.
  • Understanding vector design is crucial for successful heterologous protein production.