Download MendeleyStructure of Dystrophia Myotonica Protein Kinase.
Elkins, J., Amos, A., Niesen, F., Pike, A.C.W., Fedorov, O., Knapp, S.(2009) Protein Sci 18: 782
- PubMed: 19309729
- DOI: https://doi.org/10.1002/pro.82
- Primary Citation of Related Structures:
2VD5 - PubMed Abstract:
Dystrophia myotonica protein kinase (DMPK) is a serine/threonine kinase composed of a kinase domain and a coiled-coil domain involved in the multimerization. The crystal structure of the kinase domain of DMPK bound to the inhibitor bisindolylmaleimide VIII (BIM-8) revealed a dimeric enzyme associated by a conserved dimerization domain. The affinity of dimerisation suggested that the kinase domain alone is insufficient for dimerisation in vivo and that the coiled-coil domains are required for stable dimer formation. The kinase domain is in an active conformation, with a fully-ordered and correctly positioned alphaC helix, and catalytic residues in a conformation competent for catalysis. The conserved hydrophobic motif at the C-terminal extension of the kinase domain is bound to the N-terminal lobe of the kinase domain, despite being unphosphorylated. Differences in the arrangement of the C-terminal extension compared to the closely related Rho-associated kinases include an altered PXXP motif, a different conformation and binding arrangement for the turn motif, and a different location for the conserved NFD motif. The BIM-8 inhibitor occupies the ATP site and has similar binding mode as observed in PDK1.
Organizational Affiliation:
Structural Genomics Consortium, Nuffield Department of Medicine, Oxford University, Old Road Campus Research Building, Oxford, OX3 7DQ, United Kingdom.
