@article{ETD, school = {Ph.D.}, author = {Yoder, Nathan B.}, url = {http://digitalcollections.ohsu.edu/record/7583}, title = {Gating and modulation of acid-sensing ion channels}, publisher = {Oregon Health and Science University}, abstract = {By leveraging the inhibitory effects of divalent cations Ca2+ and Ba2+, I determined the structure of a homotrimeric ASIC in a high pH resting conformation by both x-ray crystallography and cryo-electron microscopy (cryo-EM). These results demonstrated that collapse of the acidic pocket is required for proton-dependent activation and that flexible linkers within the palm domain rearrange to enable channel desensitization. Moreover, the location of state-dependent Ba2+ sites within the acidic pocket and central vestibule, determined by anomalous scattering x-ray crystallography, indicates that inhibition of proton-dependent gating by divalent cations is at least partly due to competition for similar binding sites.}, number = {ETD}, doi = {https://doi.org/10.6083/0p0967470}, recid = {7583}, address = {2019}, }