2'-Deoxyadenosine 5'-diphosphoribose is an Endogenous TRPM2 Superagonist
Overview
Biology
Chemistry
Authors
Affiliations
Transient receptor potential melastatin 2 (TRPM2) is a ligand-gated Ca-permeable nonselective cation channel. Whereas physiological stimuli, such as chemotactic agents, evoke controlled Ca signals via TRPM2, pathophysiological stimuli such as reactive oxygen species and genotoxic stress result in prolonged TRPM2-mediated Ca entry and, consequently, apoptosis. To date, adenosine 5'-diphosphoribose (ADPR) has been assumed to be the main agonist for TRPM2. Here we show that 2'-deoxy-ADPR was a significantly better TRPM2 agonist, inducing 10.4-fold higher whole-cell currents at saturation. Mechanistically, this increased activity was caused by a decreased rate of inactivation and higher average open probability. Using high-performance liquid chromatography (HPLC) and mass spectrometry, we detected endogenous 2'-deoxy-ADPR in Jurkat T lymphocytes. Consistently, cytosolic nicotinamide mononucleotide adenylyltransferase 2 (NMNAT-2) and nicotinamide adenine dinucleotide (NAD)-glycohydrolase CD38 sequentially catalyzed the synthesis of 2'-deoxy-ADPR from nicotinamide mononucleotide (NMN) and 2'-deoxy-ATP in vitro. Thus, 2'-deoxy-ADPR is an endogenous TRPM2 superagonist that may act as a cell signaling molecule.
Huang P, Qu C, Rao Z, Wu D, Zhao J Front Immunol. 2024; 15:1391355.
PMID: 39007141 PMC: 11239348. DOI: 10.3389/fimmu.2024.1391355.
Benzi A, Heine M, Spinelli S, Salis A, Worthmann A, Diercks B Front Endocrinol (Lausanne). 2024; 14:1251351.
PMID: 38390373 PMC: 10882718. DOI: 10.3389/fendo.2023.1251351.
Pick J, Sander S, Etzold S, Rosche A, Tidow H, Guse A Front Immunol. 2024; 15:1294357.
PMID: 38318185 PMC: 10838996. DOI: 10.3389/fimmu.2024.1294357.
Okada Y, Numata T, Sabirov R, Kashio M, Merzlyak P, Sato-Numata K Front Cell Dev Biol. 2023; 11:1246955.
PMID: 37842082 PMC: 10576435. DOI: 10.3389/fcell.2023.1246955.
Zhang M, Wang Y, Xu S, Huang S, Wu M, Chen G Int J Mol Sci. 2023; 24(18).
PMID: 37762313 PMC: 10530916. DOI: 10.3390/ijms241814010.