function of polymeric nanostructures during self‐assembly remains a challenge in materials as well as biomedical science, especially when independent control over particle properties is desired. Herein, we report on nanostructures derived from amphiphilic block copolypept(o)ides by secondary‐structure‐directed self‐assembly, presenting a strategy to adjust core polarity and function separately from particle
Synthesis of diastereomerically pure Lys(<i>N</i>
<sup>ε</sup>
-lipoyl) building blocks and their use in Fmoc/tBu solid phase synthesis of lipoyl-containing peptides for diagnosis of primary biliary cirrhosis
作者:Cédric Rentier、Giulia Pacini、Francesca Nuti、Elisa Peroni、Paolo Rovero、Anna Maria Papini
DOI:10.1002/psc.2761
日期:2015.5
PrimaryBiliaryCirrhosis is an immune‐mediated disease in which one of the epitopes recognized by antimitochondrial autoantibodies is a lipoylated fragment of the PDC‐E2 protein. Accordingly, the synthesis of lipoylated peptides as diagnostic tools is a relevant target. Up to now, the proper tools for the introduction of lipoylation on buildingblocks to be used in Fmoc/tBusolidphasepeptide synthesis
PEG-ylated cationic CdSe/ZnS QDs as an efficient intracellular labeling agent
作者:Junghan Lee、Junwon Kim、Eunjung Park、Shineun Jo、Rita Song
DOI:10.1039/b801317a
日期:——
Quantum dots (QDs) have size-tunable optical properties, such as photostability, strong photoluminescence and a large Stokes-shift, which make it possible to adapt them to various biological applications. In many cases, surface modification of QDs by carboxylate ligands has been extensively studied. However, there have been few applications on QDs modified with a potential cationic ligand such as amine. In this study, we synthesized robust amine-functionalized QDs and modified their surface with poly(ethylene glycol) for long-term stability. These QDs showed an excellent stability over a broad pH-range and remarkable internalization efficiency into living cells.
Fluorogenic assay and live cell imaging of HIV-1 protease activity using acid-stable quantum dot–peptide complex
作者:Youngseon Choi、Junghan Lee、Keumhyun Kim、Heeyeon Kim、Peter Sommer、Rita Song
DOI:10.1039/c0cc02702b
日期:——
A novel QD-peptide complex for detecting HIV-1 protease activity was prepared from simple one step electrostatic interaction. Fluorescence recovery of the pre-quenched QD through fluorescence resonance energy transfer allowed for in vitro assay and live cell imaging of the protease activity in HIV-1 transfected cells, proving the potential for cell-based protease inhibitor screening.