Does Cyclic ADP-Ribose (cADPR) Activate the Non-selective Cation Channel TRPM2?

ABSTRACT: TRPM2 is a non-selective, Ca²⁺-permeable cation channel widely expressed in immune cells. It is firmly established that the channel can be activated by intracellular adenosine 5'-diphosphoribose (ADPR). Until recent cryo-EM structures have exhibited an additional nucleotide binding site in the N-terminus of the channel, this activation was thought to occur via binding to a C-terminal domain of the channel that is highly homologous to the ADPR pyrophosphatase NudT9. Over the years it has been controversially discussed whether the Ca²⁺ mobilizing second messenger cyclic ADP ribose (cADPR) might also directly activate Ca²⁺ entry via TRPM2. Here we will review the status of this discussion.

SUBMITTER: Fliegert R 

PROVIDER: S-EPMC7438885 | biostudies-literature |

REPOSITORIES: biostudies-literature