High Throughput Protein Expression and Purification pp 31-54

Part of the Methods in Molecular Biology book series (MIMB, volume 498)

Gateway Cloning for Protein Expression

  • Dominic Esposito
  • Leslie A. Garvey
  • Chacko S. Chakiath

Summary

The rate-limiting step in protein production is usually the generation of an expression clone that is capable of producing the protein of interest in soluble form at high levels. Although cloning of genes for protein expression has been possible for some time, efficient generation of functional expression clones, particularly for human proteins, remains a serious bottleneck. Often, such proteins are hard to produce in heterologous systems because they fail to express, are expressed as insoluble aggregates, or cannot be purified by standard methods. In many cases, researchers are forced to return to the cloning stages to make a new construct with a different purification tag, or perhaps to express the protein in a different host altogether. This usually requires identifying new cloning schemes to move a gene from one vector to another, and frequently requires multistep, inefficient cloning processes, as well as lengthy verification and sequence analysis. Thus, most researchers view this as a linear pathway — make an expression clone, try it out, and if it fails, go back to the beginning and start over. Because of this, protein expression pipelines can be extremely expensive and time consuming.

The advent of recombinational cloning has dramatically changed the way protein expression can be handled. Rapid production of parallel expression clones is now possible at relatively low cost, opening up many possibilities for both low- and high-throughput protein expression, and increasing the flexibility of expression systems that researchers have available to them. While many different recombinational cloning systems are available, the one with the highest level of flexibility remains the Gateway system. Gateway cloning is rapid, robust, and highly amenable to high-throughput parallel generation of expression clones for protein production.

Key words

Recombinational cloning Gateway Cloning Protein expression HTP cloning Site-specific recombination att sites Fusion proteins Solubility tags 

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Copyright information

© Humana Press, a part of Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Dominic Esposito
    • 1
  • Leslie A. Garvey
    • 1
  • Chacko S. Chakiath
    • 1
  1. 1.Protein Expression LaboratoryNational Cancer Institute, SAIC-FrederickFrederickUSA

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