Mechanosensitive Piezo channels form a small protein family encompassing only two paralogs in vertebrates, Piezo1 and Piezo2 ^[1]. Piezo1 and Piezo2 are unusually large proteins with predicted lengths of 2 100–4 700 aa and contain 24–36 TM domains ^[2]. It includes the nine repetitive THUs, beam, anchor, and the C-terminal pore module comprising the OH, CED, IH, and CTD. The N-terminal THU1-THU3 were not structurally resolved ^[5].

GsMTx4 at the membrane surface, where it is stabilized by the lysines, and occupying a small fraction of the surface area in unstressed membranes. When applied tension reduces lateral pressure in the lipids, the peptides penetrate deeper acting as "area reservoirs" leading to partial relaxation of the outer monolayer, thereby reducing the effective magnitude of stimulus acting on the MSC gate ^[7]. For PIEZO1, mutations that lead to a single amino acid substitution at human PIEZO1 M2225 (M2225R) (blue sphere in the 3D structure viewer) or R2456 (R2456H), or mouse PIEZO1 M2241 or R2482, slow down PIEZO1 inactivation and are linked to xerocytosis ^[3].

Jedi, which activates Piezo1 through the extracellular side of the blade instead of the C-terminal extracellular domain of the pore, indicating long-range allosteric gating ^[5]. Wesley M. et. al. using a combination of all-atom molecular dynamics simulations, calcium imaging and electrophysiology, we identify an allosteric Yoda1 binding pocket located in the putative mechanosensory domain, approximately 40 Å away from the central pore. Our simulations further indicate that the presence of the agonist correlates with increased tension-induced motions of the Yoda1-bound subunit. The results suggest a model wherein Yoda1 acts as a molecular wedge, facilitating force-induced conformational changes, effectively lowering the channel's mechanical threshold for activation. The identification of an allosteric agonist binding site in Piezo1 channels will pave the way for the rational design of future Piezo modulators with clinical value ^[6]. The binding site corresponding to the most stable ligand, L13, is a narrow hydrophobic pocket located near residues 1961–2063 (Piezo 1,Red Sphere in the 3D structure viewer), which are critical for Yoda1-mediated Piezo1 activation ^[4].