2'-Deoxyadenosine 5'-diphosphoribose is an endogenous TRPM2 superagonist.
2'-Deoxyadenosine 5'-diphosphoribose is an endogenous TRPM2 superagonist.
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DOI:
10.1038/nchembio.2415
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发表时间:
2017-09
影响因子:
14.8
通讯作者:
Guse AH
中科院分区:
文献类型:
--
作者:
Fliegert R;Bauche A;Wolf Pérez AM;Watt JM;Rozewitz MD;Winzer R;Janus M;Gu F;Rosche A;Harneit A;Flato M;Moreau C;Kirchberger T;Wolters V;Potter BVL;Guse AH
Transient receptor potential melastatin 2 (TRPM2), is a ligand-gated Ca2+-permeable non-selective cation channel. While physiological stimuli, e.g. chemotactic agents, evoke controlled Ca2+ signals via TRPM2, pathophysiological signals, such as reactive oxygen species or genotoxic stress result in prolonged TRPM2-mediated Ca2+ entry and consequently apoptosis. To date, adenosine 5′-diphosphoribose (ADPR, 1) has been assumed to be the main agonist for TRPM2. Here, we show that 2′-deoxy-ADPR 2 was a significantly better TRPM2 agonist, inducing 10.4-fold higher whole cell currents at saturation. Mechanistically, this increased activity was caused by decreased rate of inactivation and higher average open probability. Using high performance liquid chromatography (HPLC) and mass spectrometry, endogenous 2′-deoxy-ADPR was detected in Jurkat T-lymphocytes. Consistently, cytosolic nicotinamide mononucleotide adenylyltransferase 2 (NMNAT-2) and nicotinamide adenine dinucleotide (NAD)-glycohydrolase CD38 sequentially catalyzed synthesis of 2′-deoxy-ADPR from nicotinamide mononucleotide and 2′-deoxy-ATP in vitro. Thus, 2′-deoxy-ADPR is an endogenous TRPM2 superagonist that may act as cell signaling molecule.
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影响因子:
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作者:
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通讯作者:
Virág, L
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Gagné JP;Pic E;Isabelle M;Krietsch J;Ethier C;Paquet E;Kelly I;Boutin M;Moon KM;Foster LJ;Poirier GG
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Sattelle, David B.
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通讯作者:
O'Brien, Thomas