3ezw | pdb_00003ezw

Crystal Structure of a Hyperactive Escherichia coli Glycerol Kinase Mutant Gly230 --> Asp Obtained Using Microfluidic Crystallization Devices

spinqualitylabelsall models 3ezw, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3ezw is a 8 chain structure with sequence from Escherichia coli. This structure supersedes the now removed PDB entry 2p3r. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CL, EDO, GOL, MG Gene: b3926, glpK, JW3897 (Escherichia coli) Activity: Glycerol kinase, with EC number 2.7.1.30 Resources: FirstGlance, OCA, RCSB, PDBsum Function [GLPK_ECOLI] Key enzyme in the regulation of glycerol uptake and metabolism.[HAMAP-Rule:MF_00186] 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 The crystal structure of an Escherichia coli glycerol kinase mutant Gly230 --> Asp (GKG230D) was determined to 2.0 A resolution using a microfluidics based crystallization platform. The crystallization strategy involved a suite of microfluidic devices that characterized the solubility trends of GKG230D, performed nanoliter volume free interface diffusion crystallization experiments, and produced diffraction-quality crystals for in situ data collection. GKG230D displays increased enzymatic activity and decreased allosteric regulation by the glycolytic pathway intermediate fructose 1,6-bisphosphate (FBP) compared to wild-type GK (GKWT). Structural analysis revealed that the decreased allosteric regulation is a result of the altered FBP binding loop conformations in GKG230D that interfere with the wild-type FBP binding site. The altered FBP binding loop conformations in GKG230D are supported through a series of intramolecular loop interactions. The appearance of Asp230 in the FBP binding loops also repositions the wild-type FBP binding residues away from the FBP binding site. Light scattering analysis confirmed GKG230D is a dimer and is resistant to tetramer formation in the presence of FBP, whereas GKWT dimers are converted into putatively inactive tetramers in the presence of FBP. GKG230D also provides the first structural evidence for multiple GK monomer conformations in the presence of glycerol and in the absence of a nucleotide substrate and verifies that glycerol binding is not responsible for locking GK into the closed conformation necessary for GK activity. Crystal structure of a hyperactive Escherichia coli glycerol kinase mutant Gly230 --> Asp obtained using microfluidic crystallization devices.,Anderson MJ, DeLabarre B, Raghunathan A, Palsson BO, Brunger AT, Quake SR Biochemistry. 2007 May 15;46(19):5722-31. Epub 2007 Apr 19. PMID:17441732 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Glycerol kinase

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