In this issue of Structure, Urbanek et al. (2020a) combine site-specific isotope labeling and NMR spectroscopy to investigate opposing effects of flanking regions onto the conformation of the poly-Q region in Huntingtin. Poly-Q interactions with preceding residues promote an α-helical conformation while a following proline-rich region favors extended conformations.
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http://dx.doi.org/10.1016/j.str.2020.06.005 | DOI Listing |
Sci Total Environ
January 2025
University of Natural Resources and Life Sciences, Institute of Soil Physics and Rural Water Management, Vienna 1190, Austria.
Several groundwater quality investigations have been conducted in coastal regions that are commonly exposed to multiple anthropogenic stressors. Nonetheless, such studies remain challenging because they require focused-diagnostic approaches for a comprehensive understanding of groundwater contamination. Therefore, this study integrates a multi-tracer approach to acquire comprehensive information allowing for an improved understanding of the origins of groundwater contamination, the relative contribution of contaminants, and their biogeochemical cycling within a coastal groundwater system.
View Article and Find Full Text PDFMol Pharm
January 2025
Molecular Imaging Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, United States.
Nanobodies, or single-domain antibody fragments, are promising candidates for molecular imaging due to their small size, rapid tissue penetration, and high target specificity. However, a significant challenge in their use is high renal uptake and retention, which can limit the therapeutic efficacy and complicate image interpretation. This study compares five different fluorine-18-labeled prosthetic groups for nanobodies, aiming to optimize pharmacokinetics and minimize kidney retention while maintaining tumor targeting.
View Article and Find Full Text PDFInt J Pharm
January 2025
Department of Pharmaceutical Sciences, University of Connecticut, Storrs, CT, USA. Electronic address:
Advanced ovarian cancer with peritoneal metastasis is challenging to treat. Limited tumor delivery and penetration of the therapeutics to deep tumor regions are significant barriers to effective treatment. The rising radiopharmaceuticals offer hopes for patients through targeted delivery.
View Article and Find Full Text PDFChem Commun (Camb)
January 2025
Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, Wood Lane, London W120BZ, UK.
The π-clamp-mediated conjugation method, which enables site-specific modification of cysteine residues, is a promising strategy for developing well-defined radiolabelled biomolecules for positron emission tomography (PET) imaging. We have applied this method to site-specifically attach the macrocyclic chelators "NODA" and "NODAGA" to the somatostatin receptor 2-targeted peptide, octreotate. The resulting novel NODA-octreotate and NODAGA-octreotate compounds can be radiolabelled with either [F]AlF or [Ga]Ga respectively.
View Article and Find Full Text PDFChemistry
December 2024
Centre de Biologie Structurale (CBS), Université de Montpellier, INSERM, CNRS, 29 rue de Navacelles, 34090, Montpellier, France.
The incorporation of fluorinated amino acids into proteins provides new opportunities to study biomolecular structure-function relationships in an elegant manner. The available strategies to incorporate the majority of fluorinated amino acids are not site-specific or imply important structural modifications. Here, we present a chemical biology approach for the site-specific incorporation of three commercially available C-modified fluoroprolines that has been validated using a non-pathogenic version of huntingtin exon-1 (HttExon-1).
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