1u0r

Crystal structure of Mycobacterium tuberculosis NAD kinase

spinqualitylabelsall models 1u0r, resolution 2.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1u0r is a 4 chain structure with sequence from "bacillus_tuberculosis"_(zopf_1883)_klein_1884 "bacillus tuberculosis" (zopf 1883) klein 1884. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 1u0t Gene: ppnK ("Bacillus tuberculosis" (Zopf 1883) Klein 1884) Activity: NAD(+) kinase, with EC number 2.7.1.23 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [NADK_MYCTU] Involved in the regulation of the intracellular balance of NAD and NADP, and is a key enzyme in the biosynthesis of NADP. Catalyzes specifically the phosphorylation on 2'-hydroxyl of the adenosine moiety of NAD to yield NADP. It can use ATP and other nucleoside triphosphates as well as inorganic polyphosphate (poly(P)) as a source of phosphorus.[HAMAP-Rule:MF_00361] 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 NAD kinase catalyzes the magnesium-dependent phosphorylation of NAD, representing the sole source of freshly synthesized NADP in all organisms. The enzyme is essential for the growth of the deadly multidrug-resistant pathogen Mycobacterium tuberculosis and is an attractive target for novel antitubercular agents. The crystal structure of NAD kinase has been solved by multiwavelength anomalous dispersion at a resolution of 2.3 A in its T state. Two crystal forms have been obtained revealing either a dimer or a tetramer. The enzyme architecture discloses a novel molecular arrangement, with each subunit consisting of an alpha/beta N-terminal domain and a C-terminal 12-stranded beta sandwich domain, connected by swapped beta strands. The C-terminal domain shows a striking internal approximate 222 symmetry and an unprecedented topology, revealing a novel fold within the family of all beta structures. The catalytic site is located in the long crevice that defines the interface between the domains. The conserved GGDG structural fingerprint of the catalytic site is reminiscent of the related region in 6-phosphofructokinase, supporting the hypothesis that NAD kinase belongs to a newly reported superfamily of kinases. A novel fold revealed by Mycobacterium tuberculosis NAD kinase, a key allosteric enzyme in NADP biosynthesis.,Garavaglia S, Raffaelli N, Finaurini L, Magni G, Rizzi M J Biol Chem. 2004 Sep 24;279(39):40980-6. Epub 2004 Jul 21. PMID:15269221 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also NAD kinase

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