Jie Xu, Yan-Tian Lv, Xiao-Yun Zhao, Jing-Jing Wang, Zhong-Shan Shen, Jian Li, Fei-Fei Zhang, Jing Liu, Xiao-Hui Wang, Yun Xu, Qi Geng, Yi-Tong Ding, Jing-Jing Xu, Meng-Jiao Tan, Zhi-Xiao Li, Ran Wang, Jian Chen, Wen Sun, Meng Cui, Diomedes E Logothetis, Jun-Li Cao, Qiong-Yao Tang, Zhe Zhang
The Slack channel (KCNT1, Slo2.2) is a sodium and chloride-activated potassium channel that regulates heart rate and maintains the normal excitability of the nervous system. Despite intense interest in the sodium gating mechanism, a comprehensive investigation to identify the sodium-sensitive and chloride-sensitive sites has been missing. In the present study, we identified two potential sodium-binding sites in the C-terminal domain of the rat Slack channel by conducting electrophysical recordings and systematic mutagenesis of cytosolic acidic residues in the rat Slack channel C-terminus...
March 9, 2023: Journal of Neuroscience