3pfq | pdb_00003pfq

Crystal Structure and Allosteric Activation of Protein Kinase C beta II

spinqualitylabelsall models 3pfq, resolution 4.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3pfq is a 1 chain structure with sequence from Rattus norvegicus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ANP, CA, ZN NonStd Res: SEP, TPO Related: 2i0e, 1a25 Gene: Prkcb, Pkcb, Prkcb1 (Rattus norvegicus) Activity: Protein kinase C, with EC number 2.7.11.13 Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed Protein kinase C (PKC) isozymes are the paradigmatic effectors of lipid signaling. PKCs translocate to cell membranes and are allosterically activated upon binding of the lipid diacylglycerol to their C1A and C1B domains. The crystal structure of full-length protein kinase C betaII was determined at 4.0 A, revealing the conformation of an unexpected intermediate in the activation pathway. Here, the kinase active site is accessible to substrate, yet the conformation of the active site corresponds to a low-activity state because the ATP-binding side chain of Phe629 of the conserved NFD motif is displaced. The C1B domain clamps the NFD helix in a low-activity conformation, which is reversed upon membrane binding. A low-resolution solution structure of the closed conformation of PKCbetaII was derived from small-angle X-ray scattering. Together, these results show how PKCbetaII is allosterically regulated in two steps, with the second step defining a novel protein kinase regulatory mechanism. Crystal structure and allosteric activation of protein kinase C betaII.,Leonard TA, Rozycki B, Saidi LF, Hummer G, Hurley JH Cell. 2011 Jan 7;144(1):55-66. PMID:21215369 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Protein kinase C

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