thioacid-mediated strategy, which can couple two peptides with the N- and C-termini of glycosyl asparagine thioacid. Previous glycoprotein synthesis methods required valuable glycosyl asparagine in the early stage and subsequent multiple glycoprotein synthesis routes, whereas the developed concept can generate glycoproteins within a few steps from peptide and glycosyl asparagine thioacid. Herein, we report the characterization
糖基化是分泌蛋白和细胞表面蛋白的主要修饰,由此产生的聚糖在其结构中表现出相当大的异质性。要了解每种糖型产生的生物学过程,制备均质糖蛋白对于广泛的生物学实验至关重要。为了建立一种更加稳健和快速的合成均质糖蛋白的合成路线,我们研究了几个基于氨基硫代酸的关键反应。我们发现与糖基天冬酰胺硫代酸和肽硫代酸形成的二酰基二硫键偶联 (DDC) 产生糖肽。这种高效的偶联反应使我们能够开发一种新的糖蛋白合成方法,例如双功能硫代酸介导的策略,该方法可以将两个肽与糖基天冬酰胺硫代酸的 N 端和 C 端偶联。以前的糖蛋白合成方法在早期需要有价值的糖基天冬酰胺和随后的多种糖蛋白合成路线,而开发的概念可以在几个步骤内从肽和糖基天冬酰胺硫代酸中生成糖蛋白。在这里,我们报告了氨基硫代酸的 DDC 的表征和糖基天冬酰胺硫代酸用于稳健糖蛋白半合成的有效能力。
Controlling Intracellular Macrocyclization for the Imaging of Protease Activity
作者:Deju Ye、Gaolin Liang、Man Lung Ma、Jianghong Rao
DOI:10.1002/anie.201006140
日期:2011.3.1
ground: An intramolecular macrocyclization reaction took place highly efficiently in live cells under the control of a specific enzyme and reduction by glutathione (GSH; see picture). Macrocyclic products (represented as blue rings) synthesized in cells self‐assembled into nanoparticles aggregated and retained at the site near the enzyme location to report local proteolytic activity in live cells.
biocompatible condensation to prepare oligomerichydrogels. Glutathione reduction of 1 or 2 yields the same gelator Cys‐Lys‐CBT (3) which condenses with each other to yield amphiphilic cyclic oligomers. The oligomers instantly self‐assemble into nanofibers and form oligomerichydrogels with similar mechanic properties. Chemical analyses indicated that the major condensation product in both two hydrogels is a
THREE-FUNCTIONAL PSEUDO-PEPTIDIC REAGENT, AND USES AND APPLICATIONS THEREOF
申请人:Clave Guillaume
公开号:US20100221749A1
公开(公告)日:2010-09-02
The invention relates to a three-functional pseudo-peptidic reagent, to the various uses thereof, in particular for preparing bioluminescent reagents or optionally luminescent bio-conjugates, to the use of said reagents and bio-conjugates for functionalising solid substrates, and to the use of solid substrates thus functionalised in the detection of molecules of interest.