Phosphotransferase and substrate binding mechanism of the cAMP-dependent protein kinase catalytic subunit from porcine heart as deduced from the 2.0 A structure of the complex with Mn2+ adenylyl imidodiphosphate and inhibitor peptide PKI(5-24).Bossemeyer, D., Engh, R.A., Kinzel, V., Ponstingl, H., Huber, R.
(1993) EMBO J 12: 849-859
- PubMed: 8384554
- Primary Citation of Related Structures:
- PubMed Abstract:
- 2.2 Angstrom Refined Crystal Structure of the Catalytic Subunit of cAMP-Dependent Protein Kinase Complexed with Mnatp and a Peptide Inhibitor
Zheng, J., Trafny, E.A., Knighton, D.R., Xuong, N.-H., Taylor, S.S., Ten Eyck, L.F., Sowadski, J.M.
(1993) Acta Crystallogr D Biol Crystallogr 49: 362
- Crystal Structures of the Myristylated Catalytic Subunit Ofcamp-Dependent Kinase Reveal Open and Closed Conformation
Zheng, J., Knighton, D.R., Xuong, N.-H., Taylor, S.S., Sowadski, J.M., Ten Eyck, L.F.
(1993) Protein Sci 2: 1559
- Crystal Structure of the Catalytic Subunit of Cyclic Adenosine Monophosphate Dependent-Protein Kinase
Knighton, D.R., Zheng, J.H., Ten Eyck, L.F., Ashford, V.A., Xuong, N.-H., Taylor, S.S., Sowadski, J.M.
(1991) Science 253: 407
- Structure of a Peptide Inhibitor Bound to the Catalytic Subunit of a Cyclic Adenosine Monophosphate-Dependent Protein Kinase
Knighton, D.R., Zheng, J., Ten Eyck, L.F., Xoung, N.-H., Taylor, S.S., Sowadski, J.M.
(1991) Science 253: 414
- Regulation by Phosphorylation of Reversible Association of a Myristoylated Protein Kinase C Substrate with the Plasma Membrane
Thelen, M., Rosen, A., Nairn, A.C., Aderem, A.
(1991) Nature 351: 320
- A Sequence Variant in the N-Terminal Region of the Catalytic Subunit of the cAMP-Dependent Protein Kinase
Hotz, A., Konig, N., Kretschmer, J., Maier, G., Ponstingl, H., Kinzel, V.
(1989) FEBS Lett 256: 115
- Characterization of Genomic Clones Coding for the C-Alpha and C-Beta Subunits of Mouse Camp Dependent Protein Kinase
Chrivia, J.C., Uhler, M.D., Mcknight, G.S.
(1988) J Biol Chem 263: 5739
The crystal structure of the porcine heart catalytic subunit of cAMP-dependent protein kinase in a ternary complex with the MgATP analogue MnAMP-PNP and a pseudosubstrate inhibitor peptide, PKI(5-24), has been solved at 2.0 A resolution from monoclinic crystals of the catalytic subunit isoform CA ...
The crystal structure of the porcine heart catalytic subunit of cAMP-dependent protein kinase in a ternary complex with the MgATP analogue MnAMP-PNP and a pseudosubstrate inhibitor peptide, PKI(5-24), has been solved at 2.0 A resolution from monoclinic crystals of the catalytic subunit isoform CA. The refinement is presently at an R factor of 0.194 and the active site of the molecule is well defined. The glycine-rich phosphate anchor of the nucleotide binding fold motif of the protein kinase is a beta ribbon acting as a flap with conformational flexibility over the triphosphate group. The glycines seem to be conserved to avoid steric clash with ATP. The known synergistic effects of substrate binding can be explained by hydrogen bonds present only in the ternary complex. Implications for the kinetic scheme of binding order are discussed. The structure is assumed to represent a phosphotransfer competent conformation. The invariant conserved residue Asp166 is proposed to be the catalytic base and Lys168 to stabilize the transition state. In some tyrosine kinases Lys168 is functionally replaced by an Arg displaced by two residues in the primary sequence, suggesting invariance in three-dimensional space. The structure supports an in-line transfer with a pentacoordinate transition state at the phosphorus with very few nuclear movements.
Deutsches Krebsforschungzentrum, Heidelberg, Germany.