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» Welcome! Welcome, NMR world! Our visitors map. » Log in User Name Remember Me? Not a member yet? Register Now! Password Everything you need to know about ‘protein-folding problem’ – but were too afraid to ask - Newslaundry Aug 28, 2023 - 8:28 AM - by nmrlearner Everything you need to know about ‘protein-folding problem’ – but were too afraid to ask Newslaundry Everything you need to know about ‘protein-folding problem’ – but were too afraid to ask - Newslaundry More... 0 Replies | 210 Views Relationships Between Disease Severity and the C-reactive Protein ... - Cureus Aug 26, 2023 - 9:35 PM - by nmrlearner Relationships Between Disease Severity and the C-reactive Protein ... - Cureus Relationships Between Disease Severity and the C-reactive Protein ... Cureus Read here 0 Replies | 206 Views An integrated approach of NMR experiments and MD simulations visualizes structural dynamics of a cyclic multi-domain protein Aug 26, 2023 - 9:35 PM - by nmrlearner An integrated approach of NMR experiments and MD simulations visualizes structural dynamics of a cyclic multi-domain protein Abstract Cyclization can stabilize the structure of proteins, as previously demonstrated in single-domain proteins. Although Lys48-linked polyubiquitin, a multi-domain protein, is also known to be cyclized in human cells, the structural effects of cyclization remain unclear. Here, we examined the impact of cyclization on the structural stability and dynamics of cyclic Lys48-linked diubiquitin (Ub2). As expected, cyclization increased the thermal stability of Ub2 and its resistance to proteolytic digestion, indicating that cyclization stabilized the structure of Ub2. Furthermore, cyclization repressed the interdomain motion in Ub2, but cyclic Ub2 still exhibited microsecond conformational exchange in NMR relaxation dispersion experiments. A series of long coarse-grained (CG) MD simulations visualized how cyclization slowed down the intrinsic nanosecond open-closed domain motion of Ub2 to microseconds. Thus, CG-MD analysis helped to explain the unexpected NMR relaxation results, thereby facilitating characterization of the structural stabilization of cyclic Ub2. This article is protected by copyright. All rights reserved. More... 0 Replies | 303 Views [NMR paper] An integrated approach of NMR experiments and MD simulations visualizes structural dynamics of a cyclic multi-domain protein Aug 26, 2023 - 9:35 PM - by nmrlearner An integrated approach of NMR experiments and MD simulations visualizes structural dynamics of a cyclic multi-domain protein Cyclization can stabilize the structure of proteins, as previously demonstrated in single-domain proteins. Although Lys48-linked polyubiquitin, a multi-domain protein, is also known to be cyclized in human cells, the structural effects of cyclization remain unclear. Here, we examined the impact of cyclization on the structural stability and dynamics of cyclic Lys48-linked diubiquitin (Ub(2) ). As expected, cyclization increased the thermal stability of Ub(2) and its resistance to proteolytic... More... 0 Replies | 185 Views [NMR paper] Characterization of Bioactivity of Selective Molecules in Fruit Wines by FTIR and NMR Spectroscopies, Fluorescence and Docking Calculations Aug 26, 2023 - 9:35 PM - by nmrlearner Characterization of Bioactivity of Selective Molecules in Fruit Wines by FTIR and NMR Spectroscopies, Fluorescence and Docking Calculations Fourier transform infrared (FTIR) and proton nuclear magnetic resonance (¹H NMR) spectroscopies were applied to characterize and compare the chemical shifts in the polyphenols' regions of some fruit wines. The obtained results showed that FTIR spectra (1800-900 cm^(-1)) and ¹H NMR (? 6.5-9.3 ppm) of different fruit wines can be used as main indices of the year of vintage and quality of fruit wines. In addition to the classical determination of antioxidant profiles and bioactive substances in... More... 0 Replies | 196 Views [NMR paper] Unique epitope-antibody interactions in the intrinsically disordered proteoglycan-like domain of human carbonic anhydrase IX defined by high-resolution NMR combined with yeast surface display Aug 26, 2023 - 9:35 PM - by nmrlearner Unique epitope-antibody interactions in the intrinsically disordered proteoglycan-like domain of human carbonic anhydrase IX defined by high-resolution NMR combined with yeast surface display Carbonic anhydrase (CA)-IX is an extracellular enzyme that is essential in the adaptation of tumor cells to their increasingly more hypoxic and acidic microenvironment. Within the family of carbonic anhydrases, CA-IX is unique in that it is the only CA with an N-terminal intrinsically disordered region (IDR) containing a proteoglycan (PG)-like domain. This PG-like IDR has been described to be instrumental in CA-IX's enzyme activity, as well as tumor cell motility and invasion. We have... More... 0 Replies | 197 Views [NMR paper] Binding Affinity Studies of Nicotinamide N-methyltransferase and Ligands by Saturation Transfer Difference NMR Aug 26, 2023 - 9:35 PM - by nmrlearner Binding Affinity Studies of Nicotinamide N-methyltransferase and Ligands by Saturation Transfer Difference NMR CONCLUSION: The binding affinity of nicotinamide and SAH to NNMT and its mutants were obtained by STD NMR in this study. It was found that nicotinamide and SAH bind to WT in a particular orientation, and Y20 is critical for their binding orientation and affinity to NNMT. More... 0 Replies | 214 Views [NMR paper] Fluoride permeation mechanism of the Fluc channel in liposomes revealed by solid-state NMR Aug 25, 2023 - 2:40 PM - by nmrlearner Fluoride permeation mechanism of the Fluc channel in liposomes revealed by solid-state NMR Solid-state nuclear magnetic resonance (ssNMR) methods can probe the motions of membrane proteins in liposomes at the atomic level and propel the understanding of biomolecular processes for which static structures cannot provide a satisfactory description. In this work, we report our study on the fluoride channel Fluc-Ec1 in phospholipid bilayers based on ssNMR and molecular dynamics simulations. Previously unidentified fluoride binding sites in the aqueous vestibules were experimentally... More... 0 Replies | 176 Views Page 64 of 100 « First < 14 54 62 63 64 65 66 74 > Last »

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