Requirement of Cholesterol for Calcium‐Dependent Vesicle Fusion by Strengthening Synaptotagmin‐1‐Induced Membrane Bending

HY Ali Moussa, KC Shin, J Ponraj, SJ Kim… - Advanced …, 2023 - Wiley Online Library
Cholesterol is essential for neuronal activity and function. Cholesterol depletion in the
plasma membrane impairs synaptic transmission. However, the molecular mechanisms by …

Synaptotagmin-7 outperforms synaptotagmin-1 to promote the formation of large, stable fusion pores via robust membrane penetration

KC Courtney, T Mandal, N Mehta, L Wu, Y Li… - Nature …, 2023 - nature.com
Abstract Synaptotagmin-1 and synaptotagmin-7 are two prominent calcium sensors that
regulate exocytosis in neuronal and neuroendocrine cells. Upon binding calcium, both …

Synaptotagmin activates membrane fusion through a Ca2+-dependent trans interaction with phospholipids

A Stein, A Radhakrishnan, D Riedel… - Nature structural & …, 2007 - nature.com
Synaptotagmin-1 is the calcium sensor for neuronal exocytosis, but the mechanism by which
it triggers membrane fusion is not fully understood. Here we show that synaptotagmin …

[HTML][HTML] Productive and Non-productive Pathways for Synaptotagmin 1 to Support Ca2+-Triggered Fast Exocytosis

J Kim, YK Shin - Frontiers in Molecular Neuroscience, 2017 - frontiersin.org
Ca2+-triggered SNARE-mediated membrane fusion is essential for neuronal
communication. The speed of this process is of particular importance because it sets a time …

[PDF][PDF] Single vesicle assaying of SNARE-synaptotagmin-driven fusion reveals fast and slow modes of both docking and fusion and intrasample heterogeneity

SM Christensen, MW Mortensen, DG Stamou - Biophysical journal, 2011 - cell.com
Lipid mixing between vesicles functionalized with SNAREs and the cytosolic C2AB domain
of synaptotagmin-1 recapitulates the basic Ca 2+ dependence of neuronal exocytosis …

Calcium-dependent regulation of SNARE-mediated membrane fusion by calmodulin

J Di Giovanni, C Iborra, Y Maulet, C Lévêque… - Journal of Biological …, 2010 - ASBMB
Neuroexocytosis requires SNARE proteins, which assemble into trans complexes at the
synaptic vesicle/plasma membrane interface and mediate bilayer fusion. Ca 2+ sensitivity is …

Cholesterol facilitates the native mechanism of Ca2+-triggered membrane fusion

MA Churchward, T Rogasevskaia… - Journal of cell …, 2005 - journals.biologists.com
The process of regulated exocytosis is defined by the Ca2+-triggered fusion of two apposed
membranes, enabling the release of vesicular contents. This fusion step involves a number …

[PDF][PDF] Roles of cholesterol in vesicle fusion and motion

J Zhang, R Xue, WY Ong, P Chen - Biophysical journal, 2009 - cell.com
Although it is well established that exocytosis of neurotransmitters and hormones is highly
regulated by numerous secretory proteins, such as SNARE proteins, there is an increasing …

How synaptotagmin promotes membrane fusion

S Martens, MM Kozlov, HT McMahon - Science, 2007 - science.org
Synaptic vesicles loaded with neurotransmitters are exocytosed in a soluble N-
ethylmaleimide–sensitive factor attachment protein receptor (SNARE)–dependent manner …

Synaptotagmin arrests the SNARE complex before triggering fast, efficient membrane fusion in response to Ca2+

MC Chicka, E Hui, H Liu, ER Chapman - Nature structural & molecular …, 2008 - nature.com
Neuronal communication is mediated by Ca2+-triggered fusion of transmitter-filled synaptic
vesicles with the presynaptic plasma membrane. Synaptotagmin I functions as a Ca2+ …