Norovirus protease cleaves the virus-encoded polyprotein into six mature nonstructural proteins, presenting itself as an essential enzyme for the viral replication as well as an attractive target for the antiviral drug development. A deeper understanding of the structural mechanism of the protease-substrates/inhibitors interactions by means of solution NMR methods would facilitate a rational design of the virus protease inhibitor. We here report the backbone and side-chain resonance assignment of the protease from Norwalk virus, which is the prototype strain of norovirus. The assignment data has been deposited in the BMRB database under the accession number 17523.
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http://dx.doi.org/10.1007/s12104-011-9316-3 | DOI Listing |
ACS Appl Mater Interfaces
December 2024
Air Force Research Laboratory, 711th Human Performance Wing, Wright-Patterson Air Force Base, Wright-Patterson AFB, Ohio 45433, United States.
Peptides, due to their diverse and controllable properties, are used as both liquid and gas phase recognition elements for both biological and chemical targets. While it is well understood how binding of a peptide to a biomolecule can be converted into a sensing event, there is not the same mechanistic level of understanding with regard to how peptides modulate the selectivity of semiconductor/conductor-based gas sensors. Notably, a rational, mechanistic study has not yet been performed to correlate peptide properties to the sensor response for volatile organic compounds (VOCs) as a function of chemical properties.
View Article and Find Full Text PDFJ Am Chem Soc
December 2024
Institute for Molecular Bioscience, Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, Queensland 4072, Australia.
Transpeptidases are specialized enzymes that have evolved for site-selective modification of peptides and proteins at their backbone termini. Approaches for adapting transpeptidases to catalyze side chain modifications are substantially more restricted, and typically rely on large recognition tags or require specific reaction conditions that are not easily compatible with broader applications. Here we show that the engineered asparaginyl ligase AEP1 catalyzes direct isopeptide ligation by accepting an internal 2,3-diaminopropionic acid (Dap) residue adjacent to Leu, a motif that mimics the canonical N-terminal Gly-Leu substrate.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
December 2024
Department of Physics and Centre for Processable Electronics, Imperial College London, SW7 2AZ, London, United Kingdom.
Conjugated polymers (CPs) with polar side chains can conduct electronic and ionic charges simultaneously, making them promising for bioelectronics, electrocatalysis and energy storage. Recent work showed that adding alkyl spacers between CP backbones and polar side chains improved electronic charge carrier mobility, reduced swelling and enhanced stability, without compromising ion transport. However, how alkyl spacers impact polymer backbone conformation and, subsequently, electronic properties remain unclear.
View Article and Find Full Text PDFJ Chem Phys
December 2024
Department of Chemistry, University of Chicago, Chicago, Illinois 60637, USA.
Peptoids (N-substituted glycines) are a class of sequence-defined synthetic peptidomimetic polymers with applications including drug delivery, catalysis, and biomimicry. Classical molecular simulations have been used to predict and understand the conformational dynamics of single chains and their self-assembly into morphologies including sheets, tubes, spheres, and fibrils. The CGenFF-NTOID model based on the CHARMM General Force Field has demonstrated success in accurate all-atom molecular modeling of peptoid structure and thermodynamics.
View Article and Find Full Text PDFFood Chem
December 2024
State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China. Electronic address:
A novel neutral water-soluble polysaccharide (HCBP1-1) was isolated and purified from Hemerocallis citrina Borani by column chromatography. The fine structure of HCBP1-1 was determined by a series of physical and chemical means. HCBP1-1 was a homogeneous low molecular weight polysaccharide of 7.
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