3g59

Crystal Structure of Candida glabrata FMN Adenylyltransferase in complex with ATP

spinqualitylabelsall models 3g59, resolution 1.87Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3g59 is a 1 chain structure with sequence from Candida glabrata. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.87Å Ligands: ACT, ATP, POP Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q6FNA9_CANGA 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 Flavin mononucleotide adenylyltransferase (FMNAT) catalyzes the formation of the essential flavocoenzyme flavin adenine dinucleotide (FAD) and plays an important role in flavocoenzyme homeostasis regulation. By sequence comparison, bacterial and eukaryotic FMNAT enzymes belong to two different protein superfamilies and apparently utilize different sets of active-site residues to accomplish the same chemistry. Here we report the first structural characterization of a eukaryotic FMNAT from the pathogenic yeast Candida glabrata. Four crystal structures of C. glabrata FMNAT in different complexed forms were determined at 1.20-1.95 A resolutions, capturing the enzyme active-site states prior to and after catalysis. These structures reveal a novel flavin-binding mode and a unique enzyme-bound FAD conformation. Comparison of the bacterial and eukaryotic FMNATs provides a structural basis for understanding the convergent evolution of the same FMNAT activity from different protein ancestors. Structure-based investigation of the kinetic properties of FMNAT should offer insights into the regulatory mechanisms of FAD homeostasis by FMNAT in eukaryotic organisms. Structure and mechanism of a eukaryotic FMN adenylyltransferase.,Huerta C, Borek D, Machius M, Grishin NV, Zhang H J Mol Biol. 2009 Jun 5;389(2):388-400. Epub 2009 Apr 16. PMID:19375431 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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