1jjk

Selenomethionine Substitution of Orotidine-5'-monophosphate Decarboxylase from E. coli Causes a Change in Crystal Contacts and Space Group

spinqualitylabelsall models 1jjk, resolution 3.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1jjk is a 16 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 3Å Ligands: BMP, MSE Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function PYRF_ECOLI Catalyzes the decarboxylation of orotidine 5'-monophosphate (OMP) to uridine 5'-monophosphate (UMP).[HAMAP-Rule:MF_01200_B] 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 Orotidine 5'-monophosphate decarboxylase (ODCase) catalyses the decarboxylation of orotidine 5'-monophosphate to uridine 5'-monophosphate, the last step in the de novo biosynthesis of uridine 5'-monophosphate. In order to determine the structure of ODCase from Escherichia coli by the multi-wavelength anomalous dispersion technique, both native and SeMet-substituted proteins have been produced and purified. During the production of SeMet ODCase, it was observed that SeMet was the only amino acid that it was necessary to add to the defined medium during expression. SeMet-substituted ODCase in complex with the inhibitor 1-(5'-phospho-beta-D-ribofuranosyl)barbituric acid crystallizes under similar conditions as the native enzyme. In contrast to the native enzyme, where the crystals belong to the orthorhombic space group P2(1)2(1)2(1), the SeMet-substituted enzyme crystallizes in the monoclinic space group P2(1), with a quadrupling of the volume of the asymmetric unit. Despite the drastic difference in symmetry, the overall crystal packing is effectively identical in the two crystal forms. The change in space group appears to originate in differences in the crystal contacts near the SeMet and Met residues. These differences can be rationalized in terms of SeMet's larger size and hydrophobicity. Selenomethionine substitution of orotidine-5'-monophosphate decarboxylase causes a change in crystal contacts and space group.,Poulsen JC, Harris P, Jensen KF, Larsen S Acta Crystallogr D Biol Crystallogr. 2001 Sep;57(Pt 9):1251-9. Epub 2001, Aug 23. PMID:11526316 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Uridine 5'-monophosphate synthase 3D structures

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