Optimized in vitro and in vivo expression of proteorhodopsin: A seven-transmembrane proton pump
Artikel i vetenskaplig tidskrift, 2008
Proteorhodopsin is an integral membrane light-harvesting proton pump that is found in bacteria distributed throughout global surface waters. Here, we present a protocol for functional in vitro production of pR using a commercial cell-free synthesis system yielding 1.0 mg purified protein per milliliter of cell lysate. We also present an optimized protocol for in vivo over-expression of pR in Escherichia coli, and a two-step purification yielding 5 mg of essentially pure functional protein per liter of culture. Both approaches are straightforward, rapid, and easily scalable. Thus either may facilitate the exploitation of pR for commercial biotechnological applications. Finally, the implications of some observations of the in vitro synthesis behavior, as well as preliminary results towards a structural determination of pR are discussed.
Membrane protein
Functional expression
Cell-free
Proteorhodopsin
Författare
Pontus Emanuel Gourdon
Chalmers, Kemi- och bioteknik, Molekylär mikroskopi
Anna Alfredsson
Göteborgs universitet
Anders Pedersen
Göteborgs universitet
Erik Malmerberg
Göteborgs universitet
Anna Maria Nyblom
Chalmers, Kemi- och bioteknik, Molekylär mikroskopi
Mikael Widell
Chalmers
Ronnie Berntsson
Chalmers
Rijksuniversiteit Groningen
Jarone Pinhassi
Linnéuniversitetet
Marc Braiman
Syracuse University
Örjan Hansson
Göteborgs universitet
Nicklas Bonander
Göteborgs universitet
B Göran Karlsson
Göteborgs universitet
Richard Neutze
Göteborgs universitet
Protein Expression and Purification
1046-5928 (ISSN) 1096-0279 (eISSN)
Vol. 58 1 103-113Ämneskategorier
Kemi
DOI
10.1016/j.pep.2007.10.017