@article{MTMT:2762109, title = {Putative chanzyme activity of TRPM2 cation channel is unrelated to pore gating}, url = {https://m2.mtmt.hu/api/publication/2762109}, author = {Tóth, Balázs and Iordanov, Iordan and Csanády, László}, doi = {10.1073/pnas.1412449111}, journal-iso = {P NATL ACAD SCI USA}, journal = {PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA}, volume = {111}, unique-id = {2762109}, issn = {0027-8424}, year = {2014}, eissn = {1091-6490}, pages = {16949-16954}, orcid-numbers = {Tóth, Balázs/0000-0002-1257-2597; Iordanov, Iordan/0000-0001-8251-5857; Csanády, László/0000-0002-6547-5889} } @article{MTMT:2041974, title = {Pore collapse underlies irreversible inactivation of TRPM2 cation channel currents.}, url = {https://m2.mtmt.hu/api/publication/2041974}, author = {Tóth, Balázs and Csanády, László}, doi = {10.1073/pnas.1204702109}, journal-iso = {P NATL ACAD SCI USA}, journal = {PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA}, volume = {109}, unique-id = {2041974}, issn = {0027-8424}, abstract = {The Ca(2+)-permeable cation channel transient receptor potential melastatin 2 (TRPM2) plays a key role in pathogen-evoked phagocyte activation, postischemic neuronal apoptosis, and glucose-evoked insulin secretion, by linking these cellular responses to oxidative stress. TRPM2 channels are coactivated by binding of intracellular ADP ribose and Ca(2+) to distinct cytosolically accessible sites on the channels. These ligands likely regulate the activation gate, conserved in the voltage-gated cation channel superfamily, that comprises a helix bundle formed by the intracellular ends of transmembrane helix six of each subunit. For several K(+) and TRPM family channels, activation gate opening requires the presence of phosphatidylinositol-bisphosphate (PIP(2)) in the inner membrane leaflet. Most TRPM family channels inactivate upon prolonged stimulation in inside-out patches; this "rundown" is due to PIP(2) depletion. TRPM2 currents also run down within minutes, but the molecular mechanism of this process is unknown. Here we report that high-affinity PIP(2) binding regulates Ca(2+) sensitivity of TRPM2 activation. Nevertheless, TRPM2 inactivation is not due to PIP(2) depletion; rather, it is state dependent, sensitive to permeating ions, and can be completely prevented by mutations in the extracellular selectivity filter. Introduction of two negative charges plus a single-residue insertion, to mimic the filter sequence of TRPM5, results in TRPM2 channels that maintain unabated maximal activity for over 1 h, and display altered permeation properties but intact ADP ribose/Ca(2+)-dependent gating. Thus, upon prolonged stimulation, the TRPM2 selectivity filter undergoes a conformational change reminiscent of that accompanying C-type inactivation of voltage-gated K(+) channels. The noninactivating TRPM2 variant will be invaluable for gating studies.}, year = {2012}, eissn = {1091-6490}, pages = {13440-13445}, orcid-numbers = {Tóth, Balázs/0000-0002-1257-2597; Csanády, László/0000-0002-6547-5889} } @article{MTMT:1493078, title = {Identification of Direct and Indirect Effectors of the Transient Receptor Potential Melastatin 2 (TRPM2) Cation Channel}, url = {https://m2.mtmt.hu/api/publication/1493078}, author = {Tóth, Balázs and Csanády, László}, doi = {10.1074/jbc.M109.066464}, journal-iso = {J BIOL CHEM}, journal = {JOURNAL OF BIOLOGICAL CHEMISTRY}, volume = {285}, unique-id = {1493078}, issn = {0021-9258}, year = {2010}, eissn = {1083-351X}, pages = {30091-30102}, orcid-numbers = {Tóth, Balázs/0000-0002-1257-2597; Csanády, László/0000-0002-6547-5889} } @article{MTMT:1502468, title = {Four Ca2+ Ions Activate TRPM2 Channels by Binding in Deep Crevices near the Pore but Intracellularly of the Gate}, url = {https://m2.mtmt.hu/api/publication/1502468}, author = {Csanády, László and Törőcsik, Beáta}, doi = {10.1085/jgp.200810109}, journal-iso = {J GEN PHYSIOL}, journal = {JOURNAL OF GENERAL PHYSIOLOGY}, volume = {133}, unique-id = {1502468}, issn = {0022-1295}, year = {2009}, eissn = {1540-7748}, pages = {189-203}, orcid-numbers = {Csanády, László/0000-0002-6547-5889; Törőcsik, Beáta/0000-0002-9838-3710} }