A branched peptide amphiphile system was designed for enhanced recognition of biotin on nanofibers formed by self-assembly of these molecules. Branching at a lysine residue was used to design peptide amphiphiles that are capable of presenting more than one epitope per molecule. We found that biotinylated branched structures form nanofibers that enhance recognition by the avidin protein receptor relative to similar nanostructures formed by linear peptide analogues. Biotin-avidin binding to the supramolecular nanofibers was characterized by measurement of fluorescence from nanofibers incubated with chromophore-conjugated avidin.
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http://dx.doi.org/10.1021/nl048238z | DOI Listing |
Biosens Bioelectron
December 2024
Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, 411105, China. Electronic address:
Food Chem X
December 2024
National Key Laboratory of Veterinary Public Health Security, College of Veterinary Medicine, China Agricultural University, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, and Beijing Laboratory for Food Quality and Safety, Beijing 100193, PR China.
Lack of biorecognition elements significantly hinders the development of rapid detection methods for clavulanic acid (CA). To address this, we expressed Class A β-lactamases PC1 in vitro and demonstrated its high affinity for CA. Then we investigated the recognition mechanisms of PC1 for CA and identified key contact amino acids: Ser70, Lys73, Ser130, Glu166, and Lys234.
View Article and Find Full Text PDFNanoscale
December 2024
Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui 230601, China.
BMJ Case Rep
December 2024
Department of Pediatrics, Graphic Era Institute of Medical Sciences, Dehradun, Uttarakhand, India
Biotinidase deficiency, a rare metabolic disorder characterised by abnormal biotin metabolism, affects the biotin-dependent carboxylase functions. Primarily characterised by neurological and skin disorder, it may present with myriad features. Early recognition is important for preventing long-term morbidities.
View Article and Find Full Text PDFRSC Chem Biol
January 2025
Organic and Biomimetic Chemistry Research Group, Department of Organic and Macromolecular Chemistry, Ghent University Krijgslaan 281-S4 9000 Gent Belgium
In this study, we developed a simple pull-down assay using peptide nucleic acids (PNAs) equipped with a His-Tag and a G-quadruplex (G4) ligand for the selective recognition and quantification of G4-forming DNA sequences. Efficient and specific target recovery was achieved using optimized buffer conditions and magnetic Ni-NTA beads, while quantification was realized by employing the enzyme-like properties of the G4/hemin complex. The assay was validated through HPLC analysis and adapted for a 96-well plate format.
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