1sg6 | pdb_00001sg6

Crystal structure of Aspergillus nidulans 3-dehydroquinate synthase (AnDHQS) in complex with Zn2+ and NAD+, at 1.7D

spinqualitylabelsall models 1sg6, resolution 1.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1sg6 is a 2 chain structure with sequence from Aspergillus nidulans. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.7Å Ligands: NAD, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function ARO1_EMENI The AROM polypeptide catalyzes 5 consecutive enzymatic reactions in prechorismate polyaromatic amino acid biosynthesis.[HAMAP-Rule:MF_03143] 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 Crystallization of Aspergillus nidulans 3-dehydroquinate synthase (DHQS), following turnover of the enzyme by addition of the substrate DAHP, gave a new crystal form (form J). Although the crystals have dimensions of only 50 x 20 x 5 micro m, they are well ordered, diffracting to 1.7 A. The space group is C222(1), with unit-cell parameters a = 90.0, b = 103.7, c = 177.4 A. Structure determination and refinement to R = 0.19 (R(free) = 0.25) shows the DHQS is in the 'open' form with the substrate site unoccupied but with some loop regions perturbed. Previous crystals of open-form DHQS only diffracted to 2.5 A resolution. The use of enzyme turnover may be applicable in other systems in attempts to improve crystal quality. Structure of the 'open' form of Aspergillus nidulans 3-dehydroquinate synthase at 1.7 A resolution from crystals grown following enzyme turnover.,Nichols CE, Hawkins AR, Stammers DK Acta Crystallogr D Biol Crystallogr. 2004 May;60(Pt 5):971-3. Epub 2004, Apr 21. PMID:15103156 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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