The amino terminus of acid-sensing ion channel 1a forms a reentrant 'loop' that frames the lower pore and harbors a conserved 'His-Gly' motif implicated in gating and ion selectivity mechanisms.
Paul Pfeiffer, Alexei V Egorov ... Susanne Schreiber
Independently gating ion channels typically act fast within milliseconds, but cooperative interactions within a cluster of channels allow for a memory of previous electrical activity for several seconds.
Mambalgin1 binds to the thumb domain of human ASIC1a channel and inhibits the channel through hindering the proton-induced transitions from the resting closed state to the active and/or desensitized state.
The tarantula toxins psalmotoxin and guangxitoxin have a similar concave surface for interacting with α-helices in voltage-gated and acid-sensing ion channels.
Sebastian Jojoa-Cruz, Kei Saotome ... Andrew B Ward
Structures of OSCA1.2, a member of a newly characterized family of mechanically activated ion channels, provide insights into mechanism of channel gating by membrane tension.
Development of nanobodies against a model pentameric ligand-gated ion channel demonstrates they can be functionally active as negative or positive allosteric modulators and offers opportunities for future drug development.
Cathrine Bergh, Stephanie A Heusser ... Erik Lindahl
Computational models of gating processes in an ion channel show how stability shifts upon ligand-binding and mutations are reproduced, which highlights mechanistic details and proposes a new role for symmetry in gating.
Tension is the activating stimulus of Piezo1 mechanosensitive ion channels and resting membrane tension modulates overall channel sensitivity to mechanical stimulation.