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Glycosylation of foldamers derived from furanoid sugar amino acids with mannose and a propyltriazole linker results in an unprecedented 16/10 mixed-turn structure in the glycopeptides in water, with a preference for the higher-order structure irrespective of the stereochemistry of the starting foldamer. This is in stark contrast to the structures displayed by the same oligomers in water when mannosylated with a two-carbon-shorter methyltriazole linker: 16-membered turn structure in the cis-foldamer and 10-membered in its trans congener. This demonstrates the defining influence of the linker length on the structural preference of these novel glycopeptide mimics.
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http://dx.doi.org/10.1002/cbic.201600386 | DOI Listing |
J Am Chem Soc
September 2025
Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24060, United States.
Recently photoinduced dynamic ligation in a metal-organic frameworks (MOFs) was reported, where a long-lived charge-transfer excited state (ca. 30 μs) featuring partial dissociation between the carboxylate linker and metal-based node was probed by time-resolved infrared (TRIR) spectroscopy. The study offers a new mechanistic perspective to evaluate the potential contribution from the excited state molecular configuration to the performance of MOF photocatalysts.
View Article and Find Full Text PDFInt Immunopharmacol
September 2025
Key Laboratory for Biorheological Science and Technology of Chinese Ministry of Education, National Local Joint Engineering Lab for Vascular Implants, College of Bioengineering, Chongqing University, Chongqing 400044, China; JinFeng Laboratory, Chongqing, 401329, China. Electronic address: wanggx@cq
Thymic stromal lymphopoietin (TSLP) is an epithelial cell-derived cytokine that plays a crucial role in the pathophysiology of asthma, initiating multiple allergic cascade responses. Tezepelumab is the only monoclonal antibody currently approved for marketing, which acts by blocking TSLP binding to TSLPR. However, it is reported that a TSLP trap which simultaneously block TSLP binding with TSLPR and IL-7Rα has better efficiency in the repression of TSLP signal pathway.
View Article and Find Full Text PDFAnal Chem
September 2025
Laboratory of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland.
DNA-encoded libraries have become widely used in drug discovery, and several different setups to link chemical compounds to DNA have been employed in the field, including single-stranded and double-stranded DNA tags as well as a variety of linker chemistries. In our previous study, we observed distinct differences in binding affinities between ligands coupled either to single-stranded or double-stranded DNA; however, the molecular basis for these differences remained unclear. Here, we present a native ion mobility mass spectrometry approach that incorporates gas- and solution-phase activation techniques to systematically investigate these differences, specifically the impact of DNA tags on binding performance in protein-ligand interactions.
View Article and Find Full Text PDFACS Macro Lett
September 2025
Pritzker School of Molecular Engineering, The University of Chicago, Chicago, Illinois 60637, United States.
Introducing dynamic covalent chemistries into polymer networks allows access to complex linear viscoelasticity, owing to the reversible nature of the dynamic bonds. While this macroscopic mechanical behavior is influenced by the dynamic exchange of these chemistries, connecting the microscopic dynamics to the bulk properties is hindered by the time scale conventional techniques can observe. Here, light scattering passive microrheology is applied to probe short-time dynamics of dynamic covalent networks that consist of telechelic benzalcyanoacetate (BCA) Michael acceptors and thiol-functionalized cross-linkers.
View Article and Find Full Text PDFDalton Trans
September 2025
Department of Chemistry and Protein Research Center for Bio-Industry, Hankuk University of Foreign Studies, Yongin 17035, Republic of Korea.
The nanoscale environment within the void spaces of metal-organic frameworks (MOFs) can significantly influence the photoredox catalytic activity of encapsulated visible-light photoredox catalysts (PCs). To compare two isostructural PC@In-MOF systems, three cationic Ru(II) polypyridine complexes were successfully encapsulated within the mesoscale channels of the anionic framework of InTATB (HTATB = 4,4',4''--triazine-2,4,6-triyltribenzoic acid), which features a doubly interpenetrated framework structure. This encapsulation yielded three heterogenized visible-light PCs, RuL@InTATB, where L = 2,2'-bipyridine (bpy), 1,10-phenanthroline (phen), or 2,2'-bipyrazine (bpz).
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