2O8A
rat PP1cgamma complexed with mouse inhibitor-2
Summary for 2O8A
| Entry DOI | 10.2210/pdb2o8a/pdb |
| Related | 2O8G |
| Descriptor | Serine/threonine-protein phosphatase PP1-gamma catalytic subunit, Protein phosphatase inhibitor 2 (3 entities in total) |
| Functional Keywords | protein phosphatase, inhibitor-2, hydrolase-inhibitor complex, hydrolase/inhibitor |
| Biological source | Rattus norvegicus (Norway rat) More |
| Cellular location | Cytoplasm : P63088 |
| Total number of polymer chains | 4 |
| Total formula weight | 122023.87 |
| Authors | Hurley, T.D. (deposition date: 2006-12-12, release date: 2007-07-17, Last modification date: 2024-04-03) |
| Primary citation | Hurley, T.D.,Yang, J.,Zhang, L.,Goodwin, K.D.,Zou, Q.,Cortese, M.,Dunker, A.K.,Depaoli-Roach, A.A. Structural basis for regulation of protein phosphatase 1 by inhibitor-2. J.Biol.Chem., 282:28874-28883, 2007 Cited by PubMed Abstract: The functional specificity of type 1 protein phosphatases (PP1) depends on the associated regulatory/targeting and inhibitory subunits. To gain insights into the mechanism of PP1 regulation by inhibitor-2, an ancient and intrinsically disordered regulator, we solved the crystal structure of the complex to 2.5A resolution. Our studies show that, when complexed with PP1c, I-2 acquires three regions of order: site 1, residues 12-17, binds adjacent to a region recognized by many PP1 regulators; site 2, amino acids 44-56, interacts along the RVXF binding groove through an unsuspected sequence, KSQKW; and site 3, residues 130-169, forms alpha-helical regions that lie across the substrate-binding cleft. Specifically, residues 148-151 interact at the catalytic center, displacing essential metal ions, accounting for both rapid inhibition and slower inactivation of PP1c. Thus, our structure provides novel insights into the mechanism of PP1 inhibition and subsequent reactivation, has broad implications for the physiological regulation of PP1, and highlights common inhibitory interactions among phosphoprotein phosphatase family members. PubMed: 17636256DOI: 10.1074/jbc.M703472200 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.61 Å) |
Structure validation
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