http://hdl.handle.net/123456789/38085 2026-05-27T05:26:31Z 2026-05-27T05:26:31Z Ortiz Giron, Jhoan Sebastian http://hdl.handle.net/123456789/38086 2025-10-28T14:17:33Z 2025-09-22T00:00:00Z

Resolving the continuous high-order organization of the exocyst during vesicle tethering Ortiz Giron, Jhoan Sebastian Constitutive exocytosis is an essential and highly-conserved trafficking pathway for the delivering of cargo to the plasma membrane and the extracellular space. During this pathway, cargo-loaded vesicles are tethered to the plasma membrane by the exocyst, an heterodiramic complex, prior the vesicle fusion. Despite exocyst-mediated vesicle tethering represents a crucial stage, how multiple exocysts organize in space and time remains poorly understood. Here, we employed an integrative approach to unveil the dynamic architecture of exocyst-mediated vesicle tethering. To achieve this goal, we developed a computational workflow for the analysis of datasets from live-cell imaging, super-resolution microscopy and correlative cryo-electron tomography. We demonstrated that the exocyst high-order structure consists on seven exocyst, on average, assembled into in ring-like shapes. The radius of those rings expand from 18 to 38 nm following a saturated-exponential function defined by a characteristic time of 3.1 s.

2025-09-22T00:00:00Z