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» Welcome! Welcome, NMR world! Our visitors map. » Log in User Name Remember Me? Not a member yet? Register Now! Password Paramagnetic NMR to study iron sulfur proteins: 13C detected experiments illuminate the vicinity of the metal center Oct 19, 2023 - 1:17 PM - by nmrlearner Paramagnetic NMR to study iron sulfur proteins: 13C detected experiments illuminate the vicinity of the metal center Abstract The robustness of NMR coherence transfer in proximity of a paramagnetic center depends on the relaxation properties of the nuclei involved. In the case of Iron-Sulfur Proteins, different pulse schemes or different parameter sets often provide complementary results. Tailored versions of HCACO and CACO experiments significantly increase the number of observed Cα/Câ?? connectivities in highly paramagnetic systems, by recovering many resonances that were lost due to paramagnetic relaxation. Optimized 13C direct detected experiments can significantly extend the available assignments, improving the overall knowledge of these systems. The different relaxation properties of Cα and Câ?? nuclei are exploited in CACO vs COCA experiments and the complementarity of the two experiments is used to obtain structural information. The two [Fe2S2]+ clusters containing NEET protein CISD3 and the one [Fe4S4]2+ cluster containing HiPIP protein PioC have been taken as model systems. We show that tailored experiments contribute to decrease the blind sphere around the cluster, to extend resonance assignment of cluster bound cysteine residues and to retrieve details on the topology of the iron-bound ligand residues. Source: Journal of Biomolecular NMR 0 Replies | 204 Views Revealing structural secrets of a key cancer protein - EurekAlert Oct 19, 2023 - 1:17 PM - by nmrlearner Revealing structural secrets of a key cancer protein - EurekAlert Revealing structural secrets of a key cancer protein EurekAlert Read here 0 Replies | 213 Views [NMR paper] Chemical shift transfer: an effective strategy for protein NMR assignment with ARTINA Oct 19, 2023 - 1:17 PM - by nmrlearner Chemical shift transfer: an effective strategy for protein NMR assignment with ARTINA Chemical shift transfer (CST) is a well-established technique in NMR spectroscopy that utilizes the chemical shift assignment of one protein (source) to identify chemical shifts of another (target). Given similarity between source and target systems (e.g., using homologs), CST allows the chemical shifts of the target system to be assigned using a limited amount of experimental data. In this study, we propose a deep-learning based workflow, ARTINA-CST, that automates this procedure, allowing CST... More... 0 Replies | 149 Views [NMR paper] Paramagnetic NMR to study iron sulfur proteins: 13C detected experiments illuminate the vicinity of the metal center Oct 19, 2023 - 1:17 PM - by nmrlearner Paramagnetic NMR to study iron sulfur proteins: 13C detected experiments illuminate the vicinity of the metal center The robustness of NMR coherence transfer in proximity of a paramagnetic center depends on the relaxation properties of the nuclei involved. In the case of Iron-Sulfur Proteins, different pulse schemes or different parameter sets often provide complementary results. Tailored versions of HCACO and CACO experiments significantly increase the number of observed C^(?)/C' connectivities in highly paramagnetic systems, by recovering many resonances that were lost due to paramagnetic relaxation.... More... 0 Replies | 159 Views [NMR paper] Biomolecular NMR spectroscopy in the era of artificial intelligence Oct 18, 2023 - 6:17 AM - by nmrlearner Biomolecular NMR spectroscopy in the era of artificial intelligence Biomolecular nuclear magnetic resonance (NMR) spectroscopy and artificial intelligence (AI) have a burgeoning synergy. Deep learning-based structural predictors have forever changed structural biology, yet these tools currently face limitations in accurately characterizing protein dynamics, allostery, and conformational heterogeneity. We begin by highlighting the unique abilities of biomolecular NMR spectroscopy to complement AI-based structural predictions toward addressing these knowledge... More... 0 Replies | 160 Views [NMR paper] Resolution in Cryogenic Solid State NMR: Challenges and Solutions Oct 18, 2023 - 6:17 AM - by nmrlearner Resolution in Cryogenic Solid State NMR: Challenges and Solutions NMR at cryogenic temperatures has the potential to provide rich site-specific details regarding biopolymer structure, function, and mechanistic intermediates. Broad spectral lines compared with room temperature NMR can sometimes present practical challenges. A number of hypotheses regarding the origins of line broadening are explored. One frequently considered explanation is the presence of inhomogeneous conformational distributions. Possibly these arise when the facile characteristic motions... More... 0 Replies | 153 Views [NMR paper] Stratification of hypertension and SARS-CoV-2 infection by quantitative NMR spectroscopy of human blood serum Oct 18, 2023 - 6:17 AM - by nmrlearner Stratification of hypertension and SARS-CoV-2 infection by quantitative NMR spectroscopy of human blood serum CONCLUSIONS: We present a more precise picture of COVID-19 blood serum parameters. Accordingly, considering sex and comorbidities should be included in future metabolomics studies for improved and refined patient stratification. Due to metabolic similarities with other viral infections, these results can be applied to other respiratory diseases in the future. More... 0 Replies | 139 Views [NMR paper] Synthetic High-Density Lipoprotein-Based Nanomedicine to Silence SOCS1 in Tumor Microenvironment and Trigger Antitumor Immunity against Glioma Oct 18, 2023 - 6:17 AM - by nmrlearner Synthetic High-Density Lipoprotein-Based Nanomedicine to Silence SOCS1 in Tumor Microenvironment and Trigger Antitumor Immunity against Glioma Angewandte Chemie International Edition, Accepted Article. More... 0 Replies | 170 Views Page 54 of 100 « First < 4 44 52 53 54 55 56 64 > Last »

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