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Related Experiment Video

Updated: May 14, 2026

Rapid, Enzymatic Methods for Amplification of Minimal, Linear Templates for Protein Prototyping using Cell-Free Systems
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Rapid, Enzymatic Methods for Amplification of Minimal, Linear Templates for Protein Prototyping using Cell-Free Systems

Published on: June 14, 2021

A new method to customize protein expression vectors for fast, efficient and background free parallel cloning.

Judith Scholz1, Hüseyin Besir, Claudia Strasser

  • 1Max-Planck Institute of Biochemistry, Am Klopferspitz 18, Martinsried 82152, Germany. suppmann@biochem.mpg.de

BMC Biotechnology
|February 16, 2013
PubMed
Summary

We developed a novel expression vector series using Sequence and Ligation Independent Cloning (SLIC) for rapid, background-free protein expression and purification. This method enhances cloning efficiency and reduces background, enabling efficient screening of protein constructs and expression hosts.

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Area of Science:

  • Molecular Biology
  • Protein Expression and Purification
  • Synthetic Biology

Background:

  • Protein expression and purification often require extensive screening of variants, tags, and hosts.
  • Existing parallel vector systems can involve compromises in efficiency or background.
  • A need exists for a universally applicable, efficient, and background-free cloning approach.

Purpose of the Study:

  • To establish a fast, efficient, and background-free cloning method for protein expression.
  • To develop a parallel expression vector series for diverse expression systems.
  • To enable high-throughput screening of protein constructs and optimize purification.

Main Methods:

  • Modified expression vectors (pET, pFastBac, pTT) for parallel Sequence and Ligation Independent Cloning (SLIC).
  • Incorporated the toxic ccdB gene for counterselection, ensuring zero vector background.
  • Introduced shared primer binding sites and protease cleavage sites for streamlined cloning and tag removal.

Main Results:

  • Developed over 30 parallel expression vectors, successfully cloning and expressing over 250 genes.
  • Achieved >95% clone efficiency with up to 200 clones, demonstrating no size restriction for inserts.
  • Demonstrated 100% efficiency of ccdB counterselection, reducing vector background to zero.
  • Verified efficient expression of eGFP and various target proteins across E. coli, insect, and HEK293E cells.

Conclusions:

  • The new expression vector series enables efficient and cost-effective parallel cloning.
  • Facilitates rapid screening of diverse protein constructs, tags, and expression hosts.
  • Provides a robust platform for optimizing protein production and purification workflows.