3cwh

D-xylose Isomerase in complex with linear product, per-deuterated xylulose

spinqualitylabelsall models 3cwh, resolution 2.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3cwh is a 1 chain structure with sequence from Streptomyces rubiginosus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Neutron Diffraction, Resolution 2.2Å Ligands: DOD, MG, OH, XUL Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function XYLA_STRRU Involved in D-xylose catabolism. 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 time-of-flight neutron Laue technique has been used to determine the location of hydrogen atoms in the enzyme d-xylose isomerase (XI). The neutron structure of crystalline XI with bound product, d-xylulose, shows, unexpectedly, that O5 of d-xylulose is not protonated but is hydrogen-bonded to doubly protonated His54. Also, Lys289, which is neutral in native XI, is protonated (positively charged), while the catalytic water in native XI has become activated to a hydroxyl anion which is in the proximity of C1 and C2, the molecular site of isomerization of xylose. These findings impact our understanding of the reaction mechanism. Hydrogen location in stages of an enzyme-catalyzed reaction: time-of-flight neutron structure of D-xylose isomerase with bound D-xylulose.,Kovalevsky AY, Katz AK, Carrell HL, Hanson L, Mustyakimov M, Fisher SZ, Coates L, Schoenborn BP, Bunick GJ, Glusker JP, Langan P Biochemistry. 2008 Jul 22;47(29):7595-7. Epub 2008 Jun 26. PMID:18578508 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also D-xylose isomerase 3D structures

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