Crystal structures of apo and inhibitor-bound TGF beta R2 kinase domain: insights into TGF beta R isoform selectivity.

(2016) Acta Crystallogr D Struct Biol 72: 658-674

• PubMed: 27139629 Search on PubMed
• DOI: https://doi.org/10.1107/S2059798316003624
• Primary Citation of Related Structures:  
  5E8S,5E8T,5E8U,5E8V,5E8W,5E8X,5E8Y,5E8Z,5E90,5E91,5E92


• PubMed Abstract: 
  

  The cytokine TGF-β modulates a number of cellular activities and plays a critical role in development, hemostasis and physiology, as well as in diseases including cancer and fibrosis. TGF-β signals through two transmembrane serine/threonine kinase receptors: TGFβR1 and TGFβR2. Multiple structures of the TGFβR1 kinase domain are known, but the structure of TGFβR2 remains unreported. Wild-type TGFβR2 kinase domain was refractory to crystallization, leading to the design of two mutated constructs: firstly, a TGFβR1 chimeric protein with seven ATP-site residues mutated to their counterparts in TGFβR2, and secondly, a reduction of surface entropy through mutation of six charged residues on the surface of the TGFβR2 kinase domain to alanines. These yielded apo and inhibitor-bound crystals that diffracted to high resolution (<2 Å). Comparison of these structures with those of TGFβR1 reveal shared ligand contacts as well as differences in the ATP-binding sites, suggesting strategies for the design of pan and selective TGFβR inhibitors.

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Organizational Affiliation: 
• Molecular Structure and Design, Bristol-Myers Squibb R & D, PO Box 4000, Princeton, NJ 08543-4000, USA.
Protein Science, Bristol-Myers Squibb R & D, PO Box 4000, Princeton, NJ 08543-4000, USA.
Discovery Chemistry Oncology, Bristol-Myers Squibb R & D, PO Box 4000, Princeton, NJ 08543-4000, USA.
Mechanistic Biochemistry, Bristol-Myers Squibb R & D, 311 Pennington Rocky Hill Road, Pennington, NJ 08534, USA.
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