title: Overview of Recent Progress in Protein-Expression Technologies for Small-Molecule Screening.
abstract: Production of novel soluble and membrane-localized protein targets for functional and affinity-based screening has often been limited by the inability of traditional protein-expression systems to generate recombinant proteins that have properties similar to those of their endogenous counterparts. Such targets have often been labeled as challenging. Although biological validation of these challenging targets for specific disease areas may be strong, discovery of small-molecule modulators can be greatly delayed or completely halted due to target-expression issues. In this article, the limitations of traditional protein-expression systems will be discussed along with new systems designed to overcome these challenges. Recent work in this field has focused on two major areas for both soluble and membrane targets: construct-design strategies to improve expression levels and new hosts that can carry out the posttranslational modifications necessary for proper target folding and function. Another area of active research has been on the reconstitution of solubilized membrane targets for both structural analysis and screening. Finally, the potential impact of these new systems on the output of small-molecule screening campaigns will be discussed.
authors: X-Chem, Inc., Waltham, MA, USA jcuozzo@x-chemrx.com.
authors: John W
authors: JW
authors: Cuozzo
authors: X-Chem, Inc., Waltham, MA, USA.
authors: Holly H
authors: HH
authors: Soutter
mesh_terms: D000818:Animals; D002626:Chemistry, Pharmaceutical / Q000379:methods*; D003062:Codon; D030562:Databases, Protein; D015195:Drug Design; D004926:Escherichia coli / Q000378:metabolism; D005786:Gene Expression Regulation; D057809:HEK293 Cells; D006801:Humans; D007313:Insecta; D010766:Phosphorylation; D011499:Protein Processing, Post-Translational; D040901:Proteomics; D011993:Recombinant Fusion Proteins / Q000737:chemistry; D011994:Recombinant Proteins / Q000737:chemistry; D013678:Technology, Pharmaceutical / Q000379:methods
chemical_list: D003062:Codon; D011993:Recombinant Fusion Proteins; D011994:Recombinant Proteins
keywords: Protein expression; drug targets; review; screening; small molecule