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SUMO Protocols pp 303-317 | Cite as

SUMO Fusion Technology for Enhanced Protein Production in Prokaryotic and Eukaryotic Expression Systems

  • Tadas Panavas
  • Carsten Sanders
  • Tauseef R. Butt
Part of the METHODS IN MOLECULAR BIOLOGY™ book series (MIMB, volume 497)

Abstract

In eukaryotic cells, the reversible attachment of small ubiquitin-like modifi er (SUMO) protein is a post-translational modifi cation that has been demonstrated to play an important role in various cellular processes. Moreover, it has been found that SUMO as an N-terminal fusion partner enhances functional protein production in prokaryotic and eukaryotic expression systems, based upon significantly improved protein stability and solubility. Following the expression and purification of the fusion protein, the SUMO-tag can be cleaved by specific (SUMO) proteases via their endopeptidase activity in vitro to generate the desired N-terminus of the released protein partner. In addition to its physiological relevance in eukaryotes, SUMO can, thus, be used as a powerful biotechnological tool for protein expression in prokaryotic and eukaryotic cell systems.

In this chapter, we will describe the construction of a fusion protein with the SUMO-tag, its expression in Escherichia coli, and its purification followed by the removal of the SUMO-tag by a SUMO-specific protease in vitro.

Key words

SUMO fusion Ulp1 protein expression protein stability solubility 

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Copyright information

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

Authors and Affiliations

  • Tadas Panavas
    • 1
  • Carsten Sanders
    • 1
  • Tauseef R. Butt
    • 1
  1. 1.Life Sensors Inc.MalvernUSA

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