【摘 要】
:
During intracellular membrane trafficking, N-ethylmaleimide-sensitive factor (NSF) and alpha-soluble NSF attachment protein (a-SNAP) disassemble the soluble NSF attachment protein receptor (SNARE) com
【机 构】
:
Physics, KAIST, Daejeon, South Korea Chemistry an
【出 处】
:
The 9th Asian Biophysics Association Symposium (ABA2015)(第九届
论文部分内容阅读
During intracellular membrane trafficking, N-ethylmaleimide-sensitive factor (NSF) and alpha-soluble NSF attachment protein (a-SNAP) disassemble the soluble NSF attachment protein receptor (SNARE) complex for recycling of the SNARE proteins.The molecular mechanism by which NSF disassembles the SNARE complex is largely unknown.Using single-molecule fluorescence spectroscopy and magnetic tweezers, we found that NSF disassembled a single SNARE complex in only one round of adenosine triphosphate (ATP) turnover.Upon ATP cleavage, the NSF hexamer developed internal tension with dissociation of phosphate ions.After latent time measuring tens of seconds, NSF released the built-up tension in a burst within 20 milliseconds, resulting in disassembly followed by immediate release of the SNARE proteins.Thus, AAA+ adenosine triphosphatases (ATPases) appear to use a "spring-loaded" mechanism to couple ATP hydrolysis and unfolding of substrate proteins.
其他文献
Enrichment and purification of silymarin from Silybum marianum extracts were performed using five types of macroporous resins.Static tests indicated that HPD-600 resin had the best performance.To opti
Protein aggregation is usually mediated by denaturation and hydrophobic interaction under the presence of water molecule.In general, hydrophilic residues of proteins are exposed outside to maximize th
Liver fibrosis is a frequent, life-threatening complication in modern life.Despite major achievements in the understanding of its pathogenesis, the reversible treatment is still limited.Many studies h
Electron transfer (ET) is widely used for driving the processes that underlie the chemistry of life.However, our abilities to probe electron transfer mechanisms in proteins and design redox enzymes ar
objective: The main cellular components of the heart include cardiac fibroblasts, myocytes, endothelial cells and vascular smooth muscle cells.The fibroblast composite the largest cell population of t
Aims: Diabetes mellitus (DM) increases morbidity/mortality of ischemic heart disease.Although the ability of the natriuretic peptides to modulate cardiac function and cell proliferation has been recog
Laser tweezers Raman spectroscopy (LTRS) was used to investigate the Raman spectra of the mitochondrias of yeast cells in vitro after induced with acetic acid.The results showed that the spectral peak
Aspergillus fumigatus (a.f.) is the most frequent cause of invasive fungal infection in immunosuppressed individuals, which includes patients receiving immunosuppressive therapy for autoimmune or neop
The kidney plays a critically important role in maintaining the pH homeostasis in the body.Dysfunction in renal acid-base transport often results in severe pathological consequences.A previous study f
Large-conductance Ca2+-and voltage-activated BK channels, composed of poreforming α subunits and auxiliary β subunits, play important roles in diverse physiological activities.The β1 is predominately