1shz

Crystal Structure of the p115RhoGEF rgRGS Domain in A Complex with Galpha(13):Galpha(i1) Chimera

spinqualitylabelsall models 1shz, resolution 2.85Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1shz is a 4 chain structure with sequence from Homo sapiens, Mus musculus and Rattus norvegicus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.85Å Ligands: ALF, GDP, MG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function GNA13_MOUSE Guanine nucleotide-binding proteins (G proteins) are involved as modulators or transducers in various transmembrane signaling systems.GNAI1_RAT Guanine nucleotide-binding proteins (G proteins) are involved as modulators or transducers in various transmembrane signaling systems. The G(i) proteins are involved in hormonal regulation of adenylate cyclase: they inhibit the cyclase in response to beta-adrenergic stimuli. The inactive GDP-bound form prevents the association of RGS14 with centrosomes and is required for the translocation of RGS14 from the cytoplasm to the plasma membrane. May play a role in cell division. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed p115RhoGEF, a guanine nucleotide exchange factor (GEF) for Rho GTPase, is also a GTPase-activating protein (GAP) for G12 and G13 heterotrimeric Galpha subunits. The GAP function of p115RhoGEF resides within the N-terminal region of p115RhoGEF (the rgRGS domain), which includes a module that is structurally similar to RGS (regulators of G-protein signaling) domains. We present here the crystal structure of the rgRGS domain of p115RhoGEF in complex with a chimera of Galpha13 and Galphai1. Two distinct surfaces of rgRGS interact with Galpha. The N-terminal betaN-alphaN hairpin of rgRGS, rather than its RGS module, forms intimate contacts with the catalytic site of Galpha. The interface between the RGS module of rgRGS and Galpha is similar to that of a Galpha-effector complex, suggesting a role for the rgRGS domain in the stimulation of the GEF activity of p115RhoGEF by Galpha13. Structure of the p115RhoGEF rgRGS domain-Galpha13/i1 chimera complex suggests convergent evolution of a GTPase activator.,Chen Z, Singer WD, Sternweis PC, Sprang SR Nat Struct Mol Biol. 2005 Feb;12(2):191-7. Epub 2005 Jan 16. PMID:15665872 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Rho guanine nucleotide exchange factor 3D structures

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