Download MendeleyStructure of pyruvate dehydrogenase kinase. Novel folding pattern for a serine protein kinase.
Steussy, C.N., Popov, K.M., Bowker-Kinley, M.M., Sloan Jr., R.B., Harris, R.A., Hamilton, J.A.(2001) J Biol Chem 276: 37443-37450
- PubMed: 11483605
- DOI: https://doi.org/10.1074/jbc.M104285200
- Primary Citation of Related Structures:
1JM6 - PubMed Abstract:
The structure of mitochondrial pyruvate dehydrogenase kinase isozyme 2 is of interest because it represents a family of serine-specific protein kinases that lack sequence similarity with all other eukaryotic protein kinases. Similarity exists instead with key motifs of prokaryotic histidine protein kinases and a family of eukaryotic ATPases. The 2.5-A crystal structure reported here reveals that pyruvate dehydrogenase kinase isozyme 2 has two domains of about the same size. The N-terminal half is dominated by a bundle of four amphipathic alpha-helices, whereas the C-terminal half is folded into an alpha/beta sandwich that contains the nucleotide-binding site. Analysis of the structure reveals this C-terminal domain to be very similar to the nucleotide-binding domain of bacterial histidine kinases, but the catalytic mechanism appears similar to that of the eukaryotic serine kinases and ATPases.
Organizational Affiliation:
Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, Indiana 46202-5122, USA.
