Affinity Purification of Protein Kinases that Adopt a Specific Inactive Conformation
- 2k Downloads
Several protein kinases have been characterized in a specific inactive form called the DFG-out conformation. Unlike the active conformation which is conserved in all kinases, the inactive DFG-out conformation appears to be accessible to only certain kinases. This inactive conformation has been successfully targeted with highly selective kinase inhibitors, including the cancer drugs imatinib and sorafenib. However, the structural and sequence requirements for adopting this conformation are still poorly understood. Here, we describe a general method for enriching DFG-out adopting kinases from cell lysates with an affinity resin that contains a general ligand that specifically recognizes this inactive form.
Key wordsProtein kinase DFG-out conformation Affinity purification Inhibitors Protein conformation Protein ligands
This work was supported by the National Institute of General Medical Science (R01GM086858).
- 7.Ranjitkar P, Brock AM, Maly DJ, Affinity reagents that target a specific inactive form of protein kinases. Chem. Biol. 17:195–206.Google Scholar
- 8.Knockaert M, Gray N, Damiens E, Chang YT, Grellier P, Grant K, Fergusson D, Mottram J, Soete M, Dubremetz JF, Le Roch K, Doerig C, Schultz P, Meijer L (2000) Intracellular targets of cyclin-dependent kinase inhibitors: identification by affinity chromatography using immobilised inhibitors. Chem Biol 7:411–422PubMedCrossRefGoogle Scholar