1v8s Citations

Structural insights into the Thermus thermophilus ADP-ribose pyrophosphatase mechanism via crystal structures with the bound substrate and metal.

J Biol Chem 279 37163-74 (2004)
Related entries: 1v8i, 1v8l, 1v8m, 1v8n, 1v8r, 1v8t, 1v8u, 1v8v, 1v8w, 1v8y

Cited: 20 times
EuropePMC logo PMID: 15210687

Abstract

ADP-ribose pyrophosphatase (ADPRase) catalyzes the divalent metal ion-dependent hydrolysis of ADP-ribose to ribose 5'-phosphate and AMP. This enzyme plays a key role in regulating the intracellular ADP-ribose levels, and prevents nonenzymatic ADP-ribosylation. To elucidate the pyrophosphatase hydrolysis mechanism employed by this enzyme, structural changes occurring on binding of substrate, metal and product were investigated using crystal structures of ADPRase from an extreme thermophile, Thermus thermophilus HB8. Seven structures were determined, including that of the free enzyme, the Zn(2+)-bound enzyme, the binary complex with ADP-ribose, the ternary complexes with ADP-ribose and Zn(2+) or Gd(3+), and the product complexes with AMP and Mg(2+) or with ribose 5'-phosphate and Zn(2+). The structural and functional studies suggested that the ADP-ribose hydrolysis pathway consists of four reaction states: bound with metal (I), metal and substrate (II), metal and substrate in the transition state (III), and products (IV). In reaction state II, Glu-82 and Glu-70 abstract a proton from a water molecule. This water molecule is situated at an ideal position to carry out nucleophilic attack on the adenosyl phosphate, as it is 3.6 A away from the target phosphorus and almost in line with the scissile bond.

Reviews citing this publication (1)

  1. Structures and mechanisms of Nudix hydrolases. Mildvan AS, Xia Z, Azurmendi HF, Saraswat V, Legler PM, Massiah MA, Gabelli SB, Bianchet MA, Kang LW, Amzel LM. Arch Biochem Biophys 433 129-143 (2005)

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  6. Structural and dynamic features of the MutT protein in the recognition of nucleotides with the mutagenic 8-oxoguanine base. Nakamura T, Meshitsuka S, Kitagawa S, Abe N, Yamada J, Ishino T, Nakano H, Tsuzuki T, Doi T, Kobayashi Y, Fujii S, Sekiguchi M, Yamagata Y. J Biol Chem 285 444-452 (2010)
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  13. Structural studies of the Nudix GDP-mannose hydrolase from E. coli reveals a new motif for mannose recognition. Boto AN, Xu W, Jakoncic J, Pannuri A, Romeo T, Bessman MJ, Gabelli SB, Amzel LM. Proteins 79 2455-2466 (2011)
  14. Structure and mechanism of the bifunctional CinA enzyme from Thermus thermophilus. Karuppiah V, Thistlethwaite A, Dajani R, Warwicker J, Derrick JP. J Biol Chem 289 33187-33197 (2014)
  15. Structural and Enzymatic Characterization of a Nucleoside Diphosphate Sugar Hydrolase from Bdellovibrio bacteriovorus. de la Peña AH, Suarez A, Duong-Ly KC, Schoeffield AJ, Pizarro-Dupuy MA, Zarr M, Pineiro SA, Amzel LM, Gabelli SB. PLoS One 10 e0141716 (2015)
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  19. Letter Crystal Structures of Arabidopsis thaliana Nudix Hydrolase NUDT7 Reveal a Previously Unobserved Conformation. Tang Q, Liu C, Zhong C, Ding J. Mol Plant 8 1557-1559 (2015)