Download MendeleyA crystal structure of the cyclic GMP-dependent protein kinase I{beta} dimerization/docking domain reveals molecular details of isoform-specific anchoring.
Casteel, D.E., Smith-Nguyen, E.V., Sankaran, B., Roh, S.H., Pilz, R.B., Kim, C.(2010) J Biol Chem 285: 32684-32688
- PubMed: 20826808
- DOI: https://doi.org/10.1074/jbc.C110.161430
- Primary Citation of Related Structures:
3NMD - PubMed Abstract:
Cyclic GMP-dependent protein kinase (PKG) is a key mediator of the nitric oxide/cGMP signaling pathway and plays a central role in regulating cardiovascular and neuronal functions. The N-terminal ∼50 amino acids of the kinase are required for homodimerization and association with isoform-specific PKG-anchoring proteins (GKAPs), which target the kinase to specific substrates. To understand the molecular details of PKG dimerization and gain insight into its association with GKAPs, we solved a crystal structure of the PKG Iβ dimerization/docking domain. Our structure provides molecular details of this unique leucine/isoleucine zipper, revealing specific hydrophobic and ionic interactions that mediate dimerization and demonstrating the topology of the GKAP interaction surface.
Organizational Affiliation:
From the Department of Medicine and Cancer Center, San Diego, La Jolla, California 92093.
