title: Methods for efficient high-throughput screening of protein expression in recombinant Pichia pastoris strains.
abstract: The methylotrophic yeast Pichia pastoris is becoming one of the favorite industrial workhorses for protein expression. Due to the widespread use of integration vectors, which generates significant clonal variability, screening methods allowing assaying hundreds of individual clones are of particular importance. Here we describe methods to detect and analyze protein expression, developed in a 96-well format for high-throughput screening of recombinant P. pastoris strains. The chapter covers essentially three common scenarios: (1) an enzymatic assay for proteins expressed in the cell cytoplasm, requiring cell lysis; (2) a whole-cell assay for a fungal cytochrome P450; and (3) a nonenzymatic assay for detection and quantification of tagged protein secreted into the supernatant.
authors.affiliation: Graz University of Technology, Petersgasse 14, 8010, Graz, Austria, andrea.camattari@tugraz.at.
authors.forename: Andrea
authors.initials: A
authors.lastname: Camattari
authors.forename: Katrin
authors.initials: K
authors.lastname: Weinhandl
authors.forename: Rama K
authors.initials: RK
authors.lastname: Gudiminchi
mesh_terms: D001681:Biological Assay / Q000379:methods*; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics; D015870:Gene Expression; D042541:Intracellular Space / Q000235:genetics; D010843:Pichia / Q000166:cytology / Q000235:genetics*; D011994:Recombinant Proteins / Q000235:genetics*
chemical_list: D011994:Recombinant Proteins; D003577:Cytochrome P-450 Enzyme System