. The crystal structure of a ternary complex containing the catalytic subunit of cAMP-dependent protein kinase, ATP and a 20-residue inhibitor peptide was refined at a resolution of 2.2 A to an R value of 0.177. In order to identify the metal binding sites, the crystals, originally grown in the presence of low concentrations of Mg(2+), were soaked in Mn(2+) ...
. The crystal structure of a ternary complex containing the catalytic subunit of cAMP-dependent protein kinase, ATP and a 20-residue inhibitor peptide was refined at a resolution of 2.2 A to an R value of 0.177. In order to identify the metal binding sites, the crystals, originally grown in the presence of low concentrations of Mg(2+), were soaked in Mn(2+). Two Mn(2+) ions were identified using an anomalous Fourier map. One Mn(2+) ion bridges the gamma- and beta-phosphates and interacts with Asp184 and two water molecules. The second Mn(2+) ion interacts with the side chains of Asn171 and Asp l84 as well as with a water molecule. Modeling a serine into the P site of the inhibitor peptide suggests a mechanism for phosphotransfer.
Related Citations:
2.0 Angstrom Refined Crystal Structure of the Catalytic Subunit of Camp-Dependent Protein Kinase Complexed with a Peptide Inhibitor and Detergent Knighton, D.R., Bell, S.M., Zheng, J., Teneyck, L.F., Xuong, N.-H., Taylor, S.S., Sowadski, J.M. () To be published --: --
Crystal Structure of the Catalytic Subunit of cAMP-Dependent Protein Kinase Complexed with Mg/ATP and Peptide Inhibitor Zheng, J., Knighton, D.R., Teneyck, L.F., Karlsson, R., Xuong, N.-H., Taylor, S.S., Sowadski, J.M. (1993) Biochemistry 32: 2154
Crystal Structure of the Catalytic Subunit of Cyclic Adenosine Monophosphate-Dependent Protein Kinase Knighton, D.R., Zheng, J., Teneyck, L.F., Xuong, V.A., Ashford, N.-H., Taylor, S.S., Sowadski, J.M. (1991) Science 253: 407
Structure of a Peptide Inhibitor Bound to the Catalytic Subunit of Cyclic Adenosine Monophosphate-Dependent Protein Kinase Knighton, D.R., Zheng, J., Teneyck, L.F., Xuong, N.-H., Taylor, S.S., Sowadski, J.M. (1991) Science 253: 414
Expression of the Catalytic Subunit of C/AMP-Dependent Protein Kinase in Escherichia Coli Slice, L.W., Taylor, S.S. (1989) J Biol Chem 264: 20940
Organizational Affiliation:
Department of Chemistry, University of California, San Diego, La Jolla 92093-0654, USA.
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