1nb2

Crystal Structure of Nucleoside Diphosphate Kinase from Bacillus Halodenitrificans

spinqualitylabelsall models 1nb2, resolution 2.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1nb2 is a 1 chain structure with sequence from Virgibacillus halodenitrificans. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Activity: Nucleoside-diphosphate kinase, with EC number 2.7.4.6 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [Q7SIA9_VIRHA] Major role in the synthesis of nucleoside triphosphates other than ATP. The ATP gamma phosphate is transferred to the NDP beta phosphate via a ping-pong mechanism, using a phosphorylated active-site intermediate.[HAMAP-Rule:MF_00451] 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 We found that when grown under anaerobic conditions the moderate halophile, gram-positive bacterium Bacillus halodenitrificans (ATCC 49067) synthesizes large amounts of a polypeptide complex that contains a heme center capable of reversibly bind nitric oxide. This complex, when exposed to air, dissociates and reassociates into two active components, a Mn-containing superoxide dismutase (SOD) and a nucleoside diphosphate kinase (BhNDK). The crystal structure of this latter enzyme has been determined at 2.2A resolution using molecular replacement method, based on the crystal structure of Drosophila melanogaster NDK. The model contains 149 residues of a total 150 residues and 34 water molecules. BhNDK consists of a four-stranded antiparallel beta-sheet, whose surfaces are partially covered by six alpha-helices, and its overall and active site structures are similar to those of homologous enzymes. However, the hexameric packing of BhNDK shows that this enzyme is different from both eukaryotic and gram-negative bacteria. The need for the bacterium to presynthesize both SOD and NDK precursors which are activated during the anaerobic-aerobic transition is discussed. Crystal structure of a nucleoside diphosphate kinase from Bacillus halodenitrificans: coexpression of its activity with a Mn-superoxide dismutase.,Chen CJ, Liu MY, Chang T, Chang WC, Wang BC, Le Gall J J Struct Biol. 2003 May;142(2):247-55. PMID:12713952 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Nucleoside diphosphate kinase 3D structures

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