2x2e

Dynamin GTPase dimer, long axis form

spinqualitylabelsall models 2x2e, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2x2e is a 2 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ALF, GDP, MG, NA NonStd Res: MSE Related: 2x2f, 2dyn, 1dyn Activity: Dynamin GTPase, with EC number 3.6.5.5 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [DYN1_HUMAN] Microtubule-associated force-producing protein involved in producing microtubule bundles and able to bind and hydrolyze GTP. Most probably involved in vesicular trafficking processes. Involved in receptor-mediated endocytosis. 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 Dynamin is an atypical GTPase that catalyses membrane fission during clathrin-mediated endocytosis. The mechanisms of dynamin's basal and assembly-stimulated GTP hydrolysis are unknown, though both are indirectly influenced by the GTPase effector domain (GED). Here we present the 2.0 A resolution crystal structure of a human dynamin 1-derived minimal GTPase-GED fusion protein, which was dimeric in the presence of the transition state mimic GDP.AlF(4)(-).The structure reveals dynamin's catalytic machinery and explains how assembly-stimulated GTP hydrolysis is achieved through G domain dimerization. A sodium ion present in the active site suggests that dynamin uses a cation to compensate for the developing negative charge in the transition state in the absence of an arginine finger. Structural comparison to the rat dynamin G domain reveals key conformational changes that promote G domain dimerization and stimulated hydrolysis. The structure of the GTPase-GED fusion protein dimer provides insight into the mechanisms underlying dynamin-catalysed membrane fission. G domain dimerization controls dynamin's assembly-stimulated GTPase activity.,Chappie JS, Acharya S, Leonard M, Schmid SL, Dyda F Nature. 2010 May 27;465(7297):435-40. Epub 2010 Apr 28. PMID:20428113 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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