title: One-step generation of error-prone PCR libraries using Gateway® technology.
abstract: BACKGROUND
  Error-prone PCR (epPCR) libraries are one of the tools used in directed evolution. The Gateway® technology allows constructing epPCR libraries virtually devoid of any background (i.e., of insert-free plasmid), but requires two steps: the BP and the LR reactions and the associated E. coli cell transformations and plasmid purifications.
  
  
  RESULTS
  We describe a method for making epPCR libraries in Gateway® plasmids using an LR reaction without intermediate BP reaction. We also describe a BP-free and LR-free sub-cloning method for in-frame transferring the coding sequence of selected clones from the plasmid used to screen the library to another one devoid of tag used for screening (such as the green fluorescent protein). We report preliminary results of a directed evolution program using this method.
  
  
  CONCLUSIONS
  The one-step method enables producing epPCR libraries of as high complexity and quality as does the regular, two-step, protocol for half the amount of work. In addition, it contributes to preserve the original complexity of the epPCR product.
authors.affiliation: Architecture et Fonction des Macromolécules Biologiques, UMR 7257 CNRS and Aix-Marseille University, 163, Avenue de Luminy, Case 932, 13288 Marseille, Cedex 09, France.
authors.forename: Antoine
authors.initials: A
authors.lastname: Gruet
authors.forename: Sonia
authors.initials: S
authors.lastname: Longhi
authors.forename: Christophe
authors.initials: C
authors.lastname: Bignon
mesh_terms: D003001:Cloning, Molecular; D015723:Gene Library; D005821:Genetic Techniques; D010957:Plasmids / Q000235:genetics / Q000378:metabolism; D016133:Polymerase Chain Reaction