The basis for small-molecule block, insights into gating, and an unexpected architectural role for the lipid membrane are revealed in structures of the volume regulated anion channel LRRC8A.
The cryo-electron microscopy structures of an LRRC8C chimera with native channel properties reveal the diverse oligomeric assembly and suggest that lipids may play a role in gating in volume-regulated anion channels.
SWELL1 is required for basal, stretch, and flow-mediated endothelial AKT-eNOS signaling in vitro and protects against angiotensin-induced hypertension and diabetes-associated vascular dysfunction in vivo.
LRRC8A is an essential component of a mechanoresponsive ion channel signaling complex that tunes skeletal muscle differentiation, muscle cell size, function and metabolic pathways to regulate adiposity and systemic glycemia.
VRAC activation, observed with a FRET sensor of intracellular LRRC8-domains movement during gating and by fluorometry, requires plasma membrane localization and diacylglycerol signaling, but is independent of intracellular ionic strength.
Kevin Michalski, Johanna L Syrjanen ... Toshimitsu Kawate
The structure of a pannexin 1 uncovers the extracellular loops of pannexin 1 as important structural motifs for ion selectivity and channel inhibition.