1snn

3,4-dihydroxy-2-butanone 4-phosphate synthase from Methanococcus jannaschii3,4-dihydroxy-2-butanone 4-phosphate synthase from Methanococcus jannaschii

Structural highlights 1snn is a 2 chain structure with sequence from Methanocaldococcus jannaschii. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.55Å Ligands: , , Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function RIBB_METJA Catalyzes the conversion of D-ribulose 5-phosphate to formate and 3,4-dihydroxy-2-butanone 4-phosphate. 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 Methanococcus jannaschii 3,4-dihydroxy-2-butanone 4-phosphate synthase in complex with the substrate ribulose 5-phosphate at a dimetal centre has recently been determined at 1.7 A resolution. The enzyme converts ribulose 5-phosphate into 3,4-dihydroxy-2-butanone 4-phosphate, while its C4 atom is released as formate. The resulting four-carbon body supplies all eight C atoms for the xylene moiety of riboflavin. Three of the four hydroxyl groups of ribulose 5-phosphate were coordinated by the metal ions. Based on crystallographic refinement, the metals were assigned as zinc and calcium, which were present in the crystallization buffer. Neither metal supports the enzymatic reaction. In the present study, the correctness of this assignment is assessed using anomalous diffraction data collected at the high-energy side of the zinc absorption edge (lambda = 1.2823 A). Only the three tentative zinc ions give strong peaks in an anomalous difference Fourier map (>20sigma), whereas the four tentative calcium ions do not show anomalous signals above the noise level. These results confirm the initial assignment. In addition, the resolution was improved to 1.55 A. Metal sites in 3,4-dihydroxy-2-butanone 4-phosphate synthase from Methanococcus jannaschii in complex with the substrate ribulose 5-phosphate.,Steinbacher S, Schiffmann S, Bacher A, Fischer M Acta Crystallogr D Biol Crystallogr. 2004 Jul;60(Pt 7):1338-40. Epub 2004, Jun 22. PMID:15213409 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

spinqualitylabelsall models 1snn, resolution 1.55Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image