منابع مشابه
Dilation of fusion pores by crowding of SNARE proteins
Hormones and neurotransmitters are released through fluctuating exocytotic fusion pores that can flicker open and shut multiple times. Cargo release and vesicle recycling depend on the fate of the pore, which may reseal or dilate irreversibly. Pore nucleation requires zippering between vesicle-associated v-SNAREs and target membrane t-SNAREs, but the mechanisms governing the subsequent pore dil...
متن کاملDeterminants of liposome fusion mediated by synaptic SNARE proteins.
Synaptic exocytosis requires the soluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) proteins syntaxin 1, SNAP-25, and synaptobrevin (VAMP). Assembly of the SNAREs into a stable core complex is supposed to catalyze membrane fusion, and proteoliposomes reconstituted with synaptic SNARE proteins spontaneously fuse with each other. We now show that liposome fusion mediate...
متن کاملImaging single membrane fusion events mediated by SNARE proteins.
Using total internal reflection fluorescence microscopy, we have developed an assay to monitor individual fusion events between proteoliposomes containing vesicle soluble N-ethylmaleimide-sensitive factor attachment protein receptors (SNAREs) and a supported planar bilayer containing cognate target SNAREs. Approach, docking, and fusion of individual vesicles to the target membrane were quantifi...
متن کاملMembrane fusion: grappling with SNARE and SM proteins.
The two universally required components of the intracellular membrane fusion machinery, SNARE and SM (Sec1/Munc18-like) proteins, play complementary roles in fusion. Vesicular and target membrane-localized SNARE proteins zipper up into an alpha-helical bundle that pulls the two membranes tightly together to exert the force required for fusion. SM proteins, shaped like clasps, bind to trans-SNAR...
متن کاملRoles of SNARE Proteins in Synaptic Vesicle Fusion
Neurotransmitters are stored in small membrane-bound vesicles at synapses. Neurotransmitter release is initiated by depolarization of the neuron, which in turn activates voltage-gated calcium channels. Calcium influx then triggers the fusion of the synaptic vesicles with the plasma membrane. Fusion of the vesicular and plasma membranes is mediated by SNARE (soluble N-ethylmaleimide– sensitive f...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 2015
ISSN: 0006-3495
DOI: 10.1016/j.bpj.2014.11.2237