Cloning, Expression, and Purification of Recombinant Neisseria gonorrhoeae Proteins.

Modern DNA recombinant techniques and major advances in genetic engineering have resulted in the development of bacterial expression systems that guarantee an unlimited supply of valuable proteins that have potential clinical or industrial use, but which are often limited by their low natural availability. This chapter provides the reader with a general scheme to clone, express, and purify native histidine (His)-tagged proteins in the desired quantity and quality required for its intended use, and reviews the most important factors affecting the production of recombinant proteins in a soluble form. Alternative methods for purification of insoluble recombinant proteins under denaturing conditions are also discussed. An optimized protocol to successfully purify native Neisseria gonorrhoeae Adhesin Complex Protein (Ng-ACP; NGO1981) is used as a technical example for the processes, which could potentially be applied to any gonococcal recombinant protein of interest.