| 1988 |
SEC18 (yeast NSF) is essential for yeast cell growth and is required for secretory protein transport between the ER and Golgi complex. The protein is hydrophilic, lacks signal sequence or transmembrane anchor, resides in the cytoplasm, and associates transiently with a 100,000 x g pellet fraction consistent with small vesicles. |
Gene cloning by complementation, gene disruption, subcellular fractionation, in vitro transcription/translation |
Molecular and cellular biology |
High |
3054509
|
| 1990 |
Three soluble NSF attachment proteins (alpha-, beta-, gamma-SNAP) were purified from bovine brain cytosol and shown to bind NSF to Golgi membranes, forming a SNAP-NSF-membrane complex required for the membrane fusion stage of intra-Golgi transport. Yeast SEC17 encodes a functional homolog of alpha-SNAP, establishing evolutionary conservation of the NSF/SNAP fusion mechanism. |
Protein purification, in vitro Golgi transport assay, complementation with yeast sec17 mutant cytosol |
Cell |
High |
2111733
|
| 1991 |
Yeast Sec18p/NSF function is required sequentially for protein transport from the ER to the Golgi, through multiple Golgi compartments, and from the Golgi to the cell surface, defining at least three functionally distinct Golgi compartments. |
Temperature-shift experiments with sec18 and sec23 yeast mutants tracking transport of alpha-factor and CPY biosynthetic intermediates |
The Journal of cell biology |
High |
2071670
|
| 1992 |
NSF and alpha-SNAP are required during the formation of functional transport vesicles from Golgi membranes, not only at the attachment/fusion step; after vesicle formation, the NEM-sensitive function of NSF is no longer required. |
Cell-free Golgi transport assay measuring functional vesicle formation; immunodepletion of NSF/SNAP |
The Journal of cell biology |
Medium |
1522110
|
| 1993 |
Alpha- and gamma-SNAP are ubiquitously expressed and act synergistically in intra-Golgi transport; beta-SNAP is a brain-specific isoform of alpha-SNAP. SNAPs enable NSF to bind to target membranes, and their action at specific fusion sites is controlled by SNARE receptors particular to the membranes being fused. |
cDNA cloning, in vitro Golgi transport assay, tissue expression analysis |
Nature |
High |
8455721
|
| 1994 |
NSF ATPase activity is regulated by alpha- and gamma-SNAPs. Immobilized (but not soluble) SNAPs enhance NSF ATPase activity in a dose-dependent manner, primarily by decreasing the Km of the low-affinity ATPase site ~100-fold, thereby acting as a molecular switch to activate NSF at physiological ATP concentrations. |
In vitro ATPase assay with recombinant His6-tagged NSF and SNAPs; enzyme kinetics analysis |
The Journal of biological chemistry |
High |
7961908
|
| 1995 |
NSF mediates basolateral (but not apical) transport from the trans-Golgi network to the plasma membrane in MDCK epithelial cells. Anti-NSF antibodies and alpha-SNAP inhibit/stimulate basolateral transport, while apical transport is insensitive to NSF, Rab-GDI, and neurotoxins. |
In vitro transport assay with streptolysin O-permeabilized MDCK cells; anti-NSF antibodies; toxin inhibition |
Cell |
High |
7758111
|
| 1995 |
NSF together with SNAPs and p115 (a vesicle docking protein) restores cisternal regrowth from mitotic Golgi fragments in a cell-free system, while p97 (an NSF-like ATPase) also restores regrowth but produces morphologically distinct cisternae, indicating distinct roles in rebuilding Golgi after mitosis. |
Cell-free Golgi reassembly assay; NEM or salt-washing inhibition; reconstitution with purified proteins |
Cell |
High |
7553851
|
| 1995 |
Alpha- and gamma-SNAP stimulate Ca2+-dependent exocytosis in digitonin-permeabilized chromaffin cells. Recombinant NSF alone was ineffective, but ~1/3 of cellular NSF is in a non-cytosolic form sufficient for exocytosis. The stimulatory effect of alpha-SNAP requires Ca2+, MgATP, and is blocked by NEM and botulinum A toxin. |
Permeabilized chromaffin cell exocytosis assay; recombinant protein addition; inhibitor analysis |
The EMBO journal |
High |
7835334
|
| 1995 |
NSF is a hollow 10×16 nm cylindrical oligomeric ATPase. Without nucleotide, NSF adopts a 'splayed' protease-sensitive conformation revealing its subunit composition. The ternary SNARE complex (syntaxin/SNAP-25/synaptobrevin) forms a 4×14 nm rod with syntaxin and synaptobrevin aligned in parallel with membrane anchors at the same end. Alpha-SNAP and the SNARE rod bind to one end of the NSF cylinder forming an asymmetric '20S' complex. |
Quick-freeze/deep-etch electron microscopy; epitope tags; antibody and maltose-binding protein markers on recombinant proteins |
Cell |
High |
9267032
|
| 1995 |
A clostridial neurotoxin-sensitive SDS-resistant SNARE core (synaptobrevin/syntaxin/SNAP-25) is the physiological target for NSF-mediated ATP-dependent disassembly in the presence of SNAP. Cleavage of synaptobrevin or SNAP-25 by neurotoxins does not prevent 20S complex assembly but compromises the stability of the SDS-resistant SNARE core. |
In vitro 20S complex assembly/disassembly assay; clostridial neurotoxin cleavage; gel shift analysis |
The EMBO journal |
High |
7588600
|
| 1996 |
NSF is required for homotypic vacuole fusion in vitro. Using purified recombinant Sec18p (NSF) and affinity-purified anti-Sec17p (alpha-SNAP) antibodies, both Sec17p and Sec18p are shown to be essential for the homotypic fusion step of vacuole inheritance. Vacuole-to-vacuole fusion is also stimulated by certain fatty acyl-CoA compounds in a Sec18p-dependent manner. |
Cell-free vacuole inheritance assay; purified recombinant proteins; affinity-purified antibodies |
The EMBO journal |
High |
8670830
|
| 1996 |
C-terminal deletion of alpha-SNAP abolishes NSF binding, while N-terminal deletions (up to 120 residues) do not prevent NSF binding or ATPase stimulation. Both N- and C-terminal domains of alpha-SNAP are required for syntaxin binding and exocytosis stimulation, placing NSF and syntaxin in proximity through alpha-SNAP. |
Alpha-SNAP deletion mutant analysis; NSF ATPase assay; permeabilized chromaffin cell exocytosis assay |
Molecular biology of the cell |
High |
8744944
|
| 1997 |
NSF requires the C-terminal region of alpha-SNAP for ATPase stimulation: deletion of as few as 10 C-terminal residues markedly decreases ATPase stimulation; mutation of conserved leucine 294 to alanine (L294A) reduces ATPase stimulation without affecting NSF binding. Alpha-SNAP mutants defective in stimulating NSF ATPase fail to disassemble the 20S complex or stimulate exocytosis, demonstrating that alpha-SNAP-stimulated NSF ATPase activity is required for SNARE complex disassembly and exocytosis. |
Alpha-SNAP truncation and point mutants; in vitro ATPase assay; 20S complex disassembly assay; permeabilized chromaffin cell exocytosis assay |
The Journal of cell biology |
High |
9362506
|
| 1997 |
NSF is a hexamer (not tetramer or trimer) in the presence of nucleotide, stabilized by D2 domain oligomerization. The sedimentation coefficient is 13.4 S, and the unusual hydrodynamic properties cannot be explained by shape alone. |
Sedimentation equilibrium and velocity analytical ultracentrifugation; transmission EM with rotational image analysis; scanning transmission EM; multiangle light scattering |
The Journal of biological chemistry |
High |
9624162
|
| 1997 |
NSF and alpha-SNAP mediate dissociation of the Golgi SNARE complex containing GS28 and syntaxin 5. ATP hydrolysis by NSF is required; neither alpha-SNAP nor NSF alone dissociates the complex. Upon dissociation, GS28 (but not syntaxin 5) binds immobilized alpha-SNAP. |
Coimmunoprecipitation of endogenous Golgi proteins; in vitro disassembly assay with ATP/ATPgammaS; pulldown with immobilized alpha-SNAP |
The Journal of biological chemistry |
High |
9325254
|
| 1997 |
LMA1 (a heterodimer of thioredoxin and IB2) requires Sec18p (NSF) for high-affinity binding to vacuoles. The Sec18p 'priming' ATPase requires both Sec17p and LMA1. Upon Sec18p ATP hydrolysis, LMA1 transfers to and stabilizes the Vam3p (t-SNARE) complex, coupling priming to t-SNARE stabilization. |
Cell-free vacuole fusion assay; genetic synthetic lethality; subcellular fractionation; biochemical binding assays |
The Journal of cell biology |
High |
9015301
|
| 1997 |
Sec18p (NSF) is required for a novel complex at the Golgi-to-endosome (VPS) transport step in yeast. Pep12p (endosomal t-SNARE) affinity chromatography identified Vac1p, Vps45p, and Sec18p as binding partners; sec18-1 combined with overexpression of a dominant pep12 allele caused synthetic growth defects rescued by deletion of PEP12 or VAC1. |
Affinity chromatography (Pep12p-sepharose); genetic epistasis; temperature-sensitive mutant analysis; subcellular fractionation |
Molecular biology of the cell |
High |
9201718
|
| 1998 |
NSF interacts directly and selectively with the intracellular C-terminal domain of the AMPA receptor GluR2 subunit (residues Lys-844–Gln-853, with Asn-851 critical), requiring all three domains of NSF. Loading blocking decapeptides corresponding to the NSF-binding domain of GluR2, or an anti-NSF antibody, into CA1 neurons progressively decremented AMPA receptor-mediated synaptic transmission. |
Direct binding assay, peptide mapping with mutagenesis, intracellular infusion of blocking peptides and antibody in hippocampal CA1 neurons, electrophysiology |
Neuron |
High |
9697854
|
| 1998 |
GluR2 C-terminal peptide forms an ATP hydrolysis-reversible complex with NSF and alpha-/beta-SNAPs, resembling the SNARE-NSF-SNAP complex assembly. The molar ratio of NSF to SNAP in the GluR2-NSF-SNAP complex is similar to that in the t-SNARE syntaxin-NSF-SNAP complex. |
Pulldown assay with GluR2 C-terminal peptide; co-immunoprecipitation; immunofluorescence colocalization; ATPgammaS/ATP comparison |
Neuron |
High |
9697855
|
| 1998 |
In the Drosophila comatose (dNSF-1) mutant, an SDS-resistant neural SNARE complex (syntaxin/n-synaptobrevin/SNAP-25) accumulates at restrictive temperature, predominantly in plasma membrane and docked synaptic vesicle fractions. This establishes that NSF functions to disassemble or rearrange SNARE complexes after vesicle docking to maintain the readily releasable pool. |
SDS-PAGE of SNARE complexes in Drosophila NSF temperature-sensitive mutant; subcellular fractionation; electrophysiology |
The Journal of neuroscience |
High |
9852562
|
| 1998 |
NSF functions in Drosophila neuromuscular synapses downstream of vesicle docking to prime docked vesicles for calcium-triggered fusion. In comatose (dNSF-1) mutants at restrictive temperature, progressive activity-dependent reduction in neurotransmitter release occurs with marked accumulation of docked vesicles, indicating NSF does not directly catalyze fusion but maintains the pool of fusion-competent vesicles. |
Electrophysiology at adult Drosophila neuromuscular junctions; transmission electron microscopy; temperature-sensitive comatose mutant analysis |
The Journal of neuroscience |
High |
9852561
|
| 1998 |
Injection of peptides inhibiting alpha-SNAP-stimulated NSF ATPase activity into the giant squid presynaptic terminal reduces the amount and slows the kinetics of neurotransmitter release, acting at a step subsequent to vesicle docking and requiring vesicle turnover. |
Peptide injection into squid giant presynaptic terminal; electrophysiology |
Science |
High |
9469810
|
| 1998 |
LMA1 binds to vacuoles in a Sec18p-dependent manner, and Sec18p priming ATPase requires both Sec17p and LMA1. Upon Sec18p ATP hydrolysis, LMA1 transfers to a Vam3p (t-SNARE) complex and is later released in a phosphatase-regulated step, coupling the priming reaction to t-SNARE stabilization. |
Cell-free vacuole fusion assay; protein-membrane binding assays; mutant analysis |
Cell |
High |
9657146
|
| 1998 |
Late endosome-lysosome fusion is an NSF-dependent direct fusion event (not vesicular transport) that also requires a Rab GTPase. Hybrid organelles formed by this fusion can be isolated from rat liver homogenates confirming the reaction occurs in vivo. |
Cell-free content mixing assay with rat liver endosomes and lysosomes; NEM inhibition; GDP-dissociation inhibitor; density gradient fractionation; immunoEM |
The Journal of cell biology |
High |
9456319
|
| 1999 |
NSF identifies beta-arrestin1 as a binding partner (identified by yeast two-hybrid, confirmed by in vitro binding and co-immunoprecipitation). Beta-arrestin1 preferentially interacts with the ATP-bound form of NSF. NSF overexpression enhances agonist-mediated beta2-adrenergic receptor internalization and rescues dominant-negative beta-arrestin1-mediated inhibition of internalization. |
Yeast two-hybrid screen; in vitro binding of purified recombinant proteins; co-immunoprecipitation; overexpression in HEK293 cells; receptor internalization assay |
The Journal of biological chemistry |
Medium |
10196135
|
| 1999 |
Disruption of NSF-GluR2 interaction by infusion of blocking peptide (pep2m) into cultured hippocampal neurons reduces surface expression of GluR2-containing AMPA receptors (shown by reduced mEPSC frequency and reduced surface GluR2 immunostaining) without changing total GluR2. NMDA receptor surface expression is unaffected. |
Blocking peptide infusion into cultured hippocampal neurons; whole-cell patch-clamp; immunostaining with surface vs. total GluR2 comparison; viral expression of pep2m |
Neuron |
High |
10399941
|
| 1999 |
Alpha-SNAP and NSF are required at an early priming step in chromaffin cell exocytosis before release of readily releasable vesicles. Alpha-SNAP increases the amplitude of both the exocytotic burst and the slow secretion component without changing fusion kinetics, while NEM only partially inhibits the slow component without altering the exocytotic burst. |
Flash photolysis of caged Ca2+ combined with high-time-resolution capacitance measurement and amperometry; alpha-SNAP and NEM treatments |
The EMBO journal |
High |
10369670
|
| 1999 |
Blockade of NSF-GluR2 interaction prevents homosynaptic LTD in hippocampal CA1 region. Saturation of LTD prevents pep2m-induced reduction in AMPAR EPSCs. Both pep2m and LTD cause changes in quantal size and content without changes in AMPAR single-channel conductance or EPSC kinetics, suggesting an NSF-GluR2-dependent pool of AMPARs is specifically removed during LTD. |
Intracellular peptide infusion (pep2m); whole-cell patch clamp; LTD induction; minimal stimulation experiments in hippocampal slices |
Neuron |
High |
10571232
|
| 2000 |
Trans-SNARE complexes (SNAREpins) assembled between opposing membranes are functionally resistant to disruption by NSF and alphaSNAP, becoming so at the moment of formation; this resistance allows fusion to proceed despite NSF activity in the surrounding environment that normally dismantles cis-SNARE complexes. |
Reconstituted liposome fusion assay with isolated SNARE proteins; NSF/alphaSNAP addition to trans- vs cis-SNARE complexes |
The Journal of cell biology |
High |
10831610
|
| 2001 |
In Saccharomyces cerevisiae, Sec18p (NSF) and SNAREs (including Vti1p) are required for fusion of autophagosomes with the vacuole but are not involved in autophagosome formation itself. |
Temperature-shift experiments with sec18 yeast mutant; monitoring of autophagy flux and vacuolar delivery |
Molecular biology of the cell |
Medium |
11694599
|
| 2001 |
NSF ATPase activity and alpha-/beta-SNAPs disassemble the AMPA receptor GluR2-PICK1 complex. GluR2, PICK1, NSF, and alpha-/beta-SNAPs form a complex in the presence of ATPgammaS; NSF ATPase disrupts PICK1-GluR2 interactions. Alpha- and beta-SNAP have differential effects, and SNAP overexpression in hippocampal neurons alters AMPAR trafficking by acting on GluR2-PICK1 complexes. This is the first non-SNARE substrate identified for NSF disassembly activity. |
In vitro complex assembly with ATPgammaS; ATPase-dependent disassembly assay; SNAP overexpression in cultured neurons with AMPAR trafficking readout |
Neuron |
High |
11931741
|
| 2001 |
Ergosterol is required for the Sec18p (NSF)-mediated priming step of homotypic vacuole fusion. Ergosterol ligands (filipin, nystatin, amphotericin B) block in vitro vacuole fusion specifically at the priming stage, inhibiting Sec17p release from vacuoles, and their action is prevented by a reversible delay in Sec18p action. |
In vitro vacuole fusion assay; lipid manipulation with ergosterol ligands; genetic deletion of ERG genes; reversible inhibition kinetics |
The EMBO journal |
High |
11483507
|
| 2001 |
The ionic layer of the SNARE complex (specifically, the glutamine residue of syntaxin) is required for efficient alpha-SNAP/NSF-mediated disassembly. Mutation of this glutamine allows SNARE complex binding to alpha-SNAP and NSF and ATP hydrolysis but prevents dissociation into SNARE monomers, indicating the ionic layer couples ATP hydrolysis to complex dissociation. |
SNARE complex mutagenesis; in vitro NSF disassembly assay with ATPgammaS/ATP; gel-shift analysis |
Proceedings of the National Academy of Sciences of the United States of America |
High |
11762430
|
| 2001 |
SNARE complex disassembly by NSF follows (rather than precedes) synaptic vesicle fusion in Drosophila. Genetic interaction studies show that blocking evoked fusion delays accumulation of assembled SNARE complexes in comatose mutants. Double comatose/shibire mutants can deplete the entire vesicle pool, demonstrating NSF activity is not required for the fusion step itself. |
Drosophila genetic epistasis (comatose × para and comatose × shibire double mutants); behavioral paralysis assay; biochemical SNARE complex accumulation |
Proceedings of the National Academy of Sciences of the United States of America |
High |
11593041
|
| 2002 |
AP2 (clathrin adaptor) associates with GluR2 at a region overlapping the NSF binding site. Dissecting NSF vs AP2 binding with specific GluR2 mutants shows AP2 mediates NMDA-induced (but not ligand-dependent) AMPA receptor internalization and is essential for LTD, while NSF maintains synaptic AMPAR responses but is not required for NMDA receptor-mediated internalization or LTD. |
GluR2 mutant constructs dissociating NSF vs AP2 binding; co-immunoprecipitation; receptor internalization assays; hippocampal LTD recordings |
Neuron |
High |
12441055
|
| 2002 |
Ablation of NSF binding to GluR2 results in increased AMPA receptor endocytosis in response to AMPA or NMDA compared to wild-type, while loss of GRIP/ABP binding stabilizes an intracellular pool of internalized AMPARs and inhibits recycling, defining distinct roles for NSF (preventing excess endocytosis) vs GRIP/ABP (preventing recycling from intracellular stores). |
Epitope-tagged GluR2 mutants lacking NSF or PDZ binding; surface expression assays; endocytosis measurements in neurons |
Proceedings of the National Academy of Sciences of the United States of America |
Medium |
12011465
|
| 2002 |
NSF has an ATPase-independent function distinct from SNARE disassembly that is essential for Golgi membrane fusion. The Golgi-reassembly-defective mammalian NSF G274E mutant and Drosophila comatose NSF bind but cannot disassemble SNARE complexes and have almost no ATPase activity, yet retain activity in Golgi reassembly. NSF/alpha-SNAP catalyze binding of GATE-16 to GOS-28 (a Golgi v-SNARE) in an ATP-dependent but hydrolysis-independent manner, protecting the v-SNARE from binding its t-SNARE. |
Mammalian NSF mutant characterization; cell-free Golgi reassembly assay; SNARE disassembly assay; GATE-16/GOS-28 binding assay |
The Journal of cell biology |
High |
12070132
|
| 2003 |
Dominant-interfering ATP hydrolysis-deficient NSF(E329Q) disrupts Golgi stack structure into dispersed vesicular elements and inhibits intra-Golgi transport (glycosaminoglycan sulfation), while dominant-interfering p97(E578Q) does not affect Golgi structure or function. This establishes that only NSF (not p97) is directly required for Golgi membrane fusion. |
Expression of ATP hydrolysis-deficient dominant-negative mutants NSF(E329Q) and p97(E578Q) in mammalian cells; Golgi morphology by immunofluorescence; glycosaminoglycan sulfation assay; VSV-G transport assay |
Molecular biology of the cell |
High |
14617820
|
| 2005 |
NSF and PICK1 are specifically required for calcium-permeable AMPA receptor plasticity (CARP), the dynamic exchange of GluR2-lacking and GluR2-containing receptors at synapses. NSF, but not PICK1, is required for receptor stabilization at synapses; PICK1, but not NSF, regulates formation of extrasynaptic GluR2-containing receptor pools that are laterally mobilized into synapses during CARP. |
Dominant-negative NSF and PICK1 interference; GluR2 subunit tracking; electrophysiology; fluorescence imaging in hippocampal neurons |
Neuron |
Medium |
15797551
|
| 2005 |
NSF interaction with the GluR2 C-terminal domain is necessary and sufficient for rapid direct synaptic insertion of AMPA receptors. Wild-type GluR2 inserts rapidly into plasma membrane from intracellular compartments and accumulates at synaptic sites; a GluR2 mutant defective in NSF binding (DeltaA849-Q853) or GluR3 (which does not interact with NSF) show slower kinetics and initial extrasynaptic insertion. Introducing the NSF-binding site into GluR3 confers GluR2-like kinetics and synaptic targeting. |
Cell-surface thrombin cleavage assay; GluR2 mutants and chimeras; live imaging of receptor surface delivery in hippocampal neurons |
Molecular and cellular neurosciences |
Medium |
15797712
|
| 2005 |
There is a SEC18/NSF-independent protein sorting pathway from the yeast cortical ER to the plasma membrane, mediated by the C-terminal domain of Ist2p. This pathway operates independently of COPII vesicle formation and overrides other sorting signals. |
Temperature-sensitive sec18 yeast mutant; chimeric protein constructs; fluorescence microscopy of protein localization |
The Journal of cell biology |
Medium |
15911878
|
| 2006 |
NSF interacts directly with the GABAB receptor (GBR) heterodimer, forming a ternary complex in rat brain synaptosomes and CHO cells regulated by agonist stimulation. NSF functions as a priming factor required for agonist-promoted GBR desensitization independently of receptor internalization: inhibition of NSF binding (via TAT-Pep-27) abolished desensitization and prevented both PKC recruitment and receptor phosphorylation. |
Co-immunoprecipitation from synaptosomes and CHO cells; TAT peptide inhibition; Ca2+ mobilization assay; hippocampal slice electrophysiology; PKC recruitment assay |
The EMBO journal |
Medium |
16724110
|
| 2006 |
In zebrafish, nsf is required cell-autonomously in neurons for organization of nodes of Ranvier (sodium channel clustering) and myelin basic protein expression, independent of its role in synaptic vesicle fusion. Neural activity and chemical synapse function are not required for sodium channel clustering in the larval nervous system. |
Forward genetic screen in zebrafish; chimeric larval analysis (transplantation); pharmacological inhibition of neural activity and synaptic transmission; immunostaining |
Current biology |
High |
16581508
|
| 2009 |
Alpha-SNAP contains a conserved membrane attachment site (an extended loop with two phenylalanine residues in the N-terminal domain) that facilitates NSF-driven disassembly of membrane-bound (but not soluble) SNARE complexes. Mutation of these phenylalanines prevents SNAPs from supporting disassembly of membrane-anchored SNARE complexes. |
In vitro SNARE disassembly assay comparing soluble vs membrane-bound substrates; site-directed mutagenesis of alpha-SNAP phenylalanines; liposome binding assay |
The Journal of biological chemistry |
High |
19762473
|
| 2010 |
NSF-binding site within GluR2 intracellular domain is required for plasma membrane insertion of GluR2-containing AMPA receptors. RNA editing of the Q/R site in the ion channel region also plays a key role in GluR2 plasma membrane insertion. These two structural elements act in the same pathway for GluA2 and heteromeric GluA2/3 receptor delivery. |
pHluorin-tagged GluA2 with TIRF microscopy to visualize individual plasma membrane fusion events; GluA2 mutants lacking NSF binding or with Q/R editing changes |
Proceedings of the National Academy of Sciences of the United States of America |
High |
20534470
|
| 2010 |
Polo-like kinase 2 (Plk2), an activity-inducible kinase, directly interacts with NSF through a specific motif (independent of canonical polo box sites), disrupts NSF-GluA2 interaction, promotes loss of surface GluA2, increases GluA2 association with PICK1 and GRIP1, and decreases synaptic AMPAR current. Plk2 engagement of NSF (not Plk2 kinase activity) is required for this homeostatic reduction in surface AMPAR. |
Co-immunoprecipitation; pulldown with Plk2 mutants; surface biotinylation; whole-cell patch clamp in hippocampal neurons; dominant-negative and deletion constructs |
Nature neuroscience |
High |
20802490
|
| 2012 |
Cryo-EM structures of NSF hexamer in ATPgammaS, ADP-AlFx, and ADP states reveal parallel arrangement of D1 and D2 domains and nucleotide-dependent conformational changes. The 20S particle structure shows the SNARE complex held at two interaction interfaces around the C-terminus and N-terminal half of the SNARE complex. |
Single-particle cryo-EM and negative stain EM; 3D reconstruction of NSF hexamer and 20S particle |
Nature structural & molecular biology |
High |
22307055
|
| 2013 |
NSF-mediated disassembly of all tested SNARE complexes is initiated by a conserved 1:1 interaction between alpha-SNAP and the ternary SNARE complex (not influenced by N-terminal SNARE domains). This 1:1 alpha-SNAP:SNARE complex is confirmed by multiangle light scattering; NSF binding follows. |
SNARE-stimulated ATP hydrolysis rate measurements; Michaelis-Menten kinetics; SNAP-SNARE binding constants; multiangle light scattering; four different SNARE complexes tested |
The Journal of biological chemistry |
High |
23836889
|
| 2015 |
NSF disassembles a single SNARE complex in one round of ATP turnover using a 'spring-loaded' mechanism: upon ATP cleavage, the NSF hexamer develops internal tension with phosphate dissociation, then releases the tension in a burst within 20 ms resulting in SNARE disassembly and immediate release of SNARE proteins. |
Single-molecule fluorescence spectroscopy; magnetic tweezers; real-time monitoring of single SNARE complex disassembly |
Science |
High |
25814585
|
| 2015 |
Sec17 (alpha-SNAP) can trigger fusion of trans-SNARE paired membranes without Sec18 (NSF) by binding to trans-SNARE complexes and inserting apolar loops into apposed membranes; Sec18 does not substitute for Sec17 in this fusion-triggering role. Sec17 thus has two functions: stimulating Sec18-mediated cis-SNARE disassembly and independently triggering trans-SNARE-dependent fusion. |
Proteoliposome fusion assay with SNARE proteins; Sec17 and Sec18 mutants (L291A/L292A, F21S/M22S) dissociating the two functions; liposome binding assays |
Proceedings of the National Academy of Sciences of the United States of America |
High |
25902545
|
| 2016 |
LRRK2 phosphorylates NSF at threonine 645 in the ATP-binding pocket of the D2 domain. NSF phosphorylated by LRRK2 displays enhanced ATPase activity and increased rate of SNARE complex disassembly. Substitution of Thr645 with alanine abrogates LRRK2-mediated increased ATPase activity. |
In vitro kinase assay with LRRK2 and full-length NSF; phosphosite mapping; ATPase assay; SNARE complex disassembly assay; alanine substitution mutagenesis |
Molecular neurodegeneration |
High |
26758690
|
| 2017 |
Sec17 (alpha-SNAP) and Sec18 (NSF) act twice in the vacuolar fusion cycle: first binding to trans-SNARE complexes to stimulate fusion (without requiring ATP hydrolysis), and then hydrolyzing ATP to disassemble cis-SNARE complexes. At physiological protein levels, Sec17 stimulates fusion through its central residues binding the 0-layer of the SNARE complex and its N-terminal apolar loop for membrane binding. |
Yeast vacuole fusion assay with Sec17 mutants; proteoliposome fusion with asymmetric SNARE arrangement; cis-SNARE disassembly assay; transmembrane-anchored Sec17 chimera |
eLife |
High |
28718762
|
| 2018 |
Cryo-EM structure of the 20S supercomplex (NSF/2×alphaSNAP/neuronal SNARE complex) at ~3.9 Å reveals: two alphaSNAP molecules interface with a specific surface of the SNARE complex via electrostatic interactions; 15 N-terminal residues of SNAP-25A are loaded into the D1 ring pore of NSF via spiral interactions between a conserved NSF tyrosine residue and SNAP-25A backbone atoms, preceding ATP hydrolysis. |
Electron cryo-microscopy of 20S supercomplex; near-atomic resolution structure determination |
eLife |
High |
30198481
|
| 2018 |
NSF disassembles ternary SNARE complexes in a single step within 100 ms; complexin-1 competes with alphaSNAP binding to the SNARE complex, reducing disassembly rate and increasing failed disassembly events, suggesting complexin differentially regulates cis vs trans SNARE complex disassembly. NSF also disassembles anti-parallel SNARE complexes, implicating it in quality control. |
Single-molecule FRET assay monitoring repeated rounds of NSF-mediated SNARE complex disassembly and reassembly; complexin-1 competition assay |
eLife |
High |
29985126
|
| 2019 |
Formation of trans-SNARE complexes in the presence of NSF-alphaSNAP requires both Munc18-1 and Munc13-1, and is facilitated by synaptotagmin-1. Munc18-1, Munc13-1, complexin-1, and likely synaptotagmin-1 also contribute to maintaining assembled trans-SNARE complexes in the presence of NSF-alphaSNAP, preventing de-priming. |
Reconstituted proteoliposome system with defined protein components; SNARE complex formation assays with and without NSF-alphaSNAP; co-flotation and co-sedimentation assays |
eLife |
High |
30657450
|