FRET events in fluorescent pentapeptides containing aliphatic triazolo amino acid scaffolds: Role of spacer lengths
摘要:
The FRET efficiencies in donor/acceptor pairs in the two termini of designed fluorescent pentapeptides depend on the flexibility of two arms of triazolyl amino acid scaffolds positioned in the center of the backbones inducing predominant beta-sheet conformations. Flexible N-Terminus of the scaffold in a pentapeptide has led to higher FRET efficiency and makes it different from other peptide with flexible C-terminus.
Some Aspects of the Azide-Alkyne 1,3-Dipolar Cycloaddition Reaction
作者:N. T. Pokhodylo、M. A. Tupychak、O. Ya. Shyyka、M. D. Obushak
DOI:10.1134/s1070428019090082
日期:2019.9
Some peculiar features of two most commonly used catalytic systems (Cul and CuSOVsodium ascorbate) controlling the regioselectivity of 1,3-dipolar cycloaddition of azides to terminal alkynes have been studied. Their potentialities, main disadvantages, and limitations have been demonstrated by a number of examples, including reactions of low-molecular-weight azides and alkynes containing heterocyclic
New supportedcatalysts for the Huisgen’s [3+2] azide‐alkyne cycloaddition have been prepared by immobilization of copper species on commercially available polymeric matrixes incorporating the 1,5,7‐triazabicyclo[4.4.0]dec‐5‐ene (TBD) template. The synergic exploitation of the exceptional copper chelating ability and basicity profile of the TBD framework, in addition to ensuring effective immobilization
[EN] BETA-LACTAMASE INHIBITORS<br/>[FR] INHIBITEURS DE BÊTA-LACTAMASES
申请人:VENATORX PHARMACEUTICALS INC
公开号:WO2017044828A1
公开(公告)日:2017-03-16
Described herein are compounds and compositions that modulate the activity of beta -lactamases. In some embodiments, the compounds described herein inhibit beta-lactamase. In certain embodiments, the compounds described herein are useful in the treatment of bacterial infections.
Triazolo-β-aza-ε-amino acid and its aromatic analogue as novel scaffolds for β-turn peptidomimetics
作者:Subhendu Sekhar Bag、Subhashis Jana、Afsana Yashmeen、Suranjan De
DOI:10.1039/c4cc08414d
日期:——
Triazolo-β-aza-ε-amino acid and its aromatic analogue (AlTAA/ArTAA) in the peptide backbone mark a novel class of conformationally constrained molecular scaffolds to induce β-turn conformations. This was demonstrated in a Leu-enkephalin analogue and in other designed peptides.
Harnessing the Dual Properties of Thiol-Grafted Cellulose Paper for Click Reactions: A Powerful Reducing Agent and Adsorbent for Cu
作者:Jordi Rull-Barrull、Martin d'Halluin、Erwan Le Grognec、François-Xavier Felpin
DOI:10.1002/anie.201606760
日期:2016.10.17
new approach exploiting the dualproperties of thiol‐grafted cellulosepaper for promoting copper‐catalyzed [3+2]‐cycloadditions of organic azides with alkynes and adsorbing residual copper species in solution was developed. The thiol‐grafted cellulosepaper, used as a paper strip, effects the reduction of CuII to catalytically active CuI and acts as a powerfuladsorbent for copper, thereby facilitating