- Muckelbauer J, Sack JS, Ahmed N, Burke J, Chang CY, Gao M, Tino J, Xie D, Tebben AJ
- X-Ray Crystal Structure of Bone Marrow Kinase in the X Chromosome; a Tec Family Kinase.
- Chem Biol Drug Des. 2011 Aug 30. doi: 10.1111/j.1747-0285.2011.01230.x.
- Bone marrow kinase in the X chromosome (BMX), a member of the Tec family of tyrosine kinases, plays a role in both monocyte/macrophage trafficking as well as cytokine secretion. Although the structures of Tec family kinases Bruton's tyrosine kinase (BTK) and IL-2-inducible T cell kinase (ITK) are known, the crystal structures of other Tec family kinases have remained elusive. We report the X-ray crystal structures of BMX in complex with dasatinib at 2.4A resolution and PP2 at 1.9A resolution. The BMX structures reveal a typical kinase protein fold; with well ordered protein conformation that includes an open/extended activation loop and a stabilized DFG-motif rendering the kinase in an inactive conformation. Dasatinib and PP2 bind to BMX in the ATP binding pocket and display similar binding modes to that observed in other Tec and Src protein kinases. The BMX structures identify conformational elements of the DFG-motif that could potentially be utilized to design potent and/or selective BMX inhibitors.