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在色谱分析、有机合成和交叉偶联反应领域已被 0 篇同行评审文献引用。
特点和优势:
dPEG4-SATA(S-乙酰基-dPEG4-NHS酯)在单分子量dPEG连接体的一端含有乙酰基保护的硫醇,在另一端含有胺反应性N-羟基琥珀酰亚胺(NHS)酯。目标分子上的一种或多种游离伯胺可以与dPEG4-SATA反应,以通过dPEG连接体将受保护的硫醇连接到分子上。三种不同的连接体长度提供了目标分子和乙酰基保护的硫醇基团之间的精确距离控制。dPEG连接体赋予靶分子水溶性和降低的免疫原性。与仅含有烃间隔物的试剂相比,含有dPEG的试剂还减少了交联蛋白质的聚集和沉淀。乙酰基很容易用盐酸羟胺进行温和的化学脱保护,暴露出游离的硫醇,然后可以用来与另一个分子形成二硫键或硫醇醚键。尽管通常与蛋白质一起使用,但这些试剂也适用于具有合适功能的任何小分子或肽。
Features and advantages:
dPEG4-SATA (S-acetyl-dPEG4-NHS ester) contains an acetyl-protected thiol on one end of a single molecular weight dPEG linker and an amine-reactive N-hydroxysuccinimide (NHS) ester on the other end. One or more free primary amines on the target molecule can be reacted with dPEG4-SATA to install a protected thiol connected to the molecule via the dPEG linker. Three different linker lengths provide precise distance control between the target molecule and the acetyl-protected thiol group. The dPEG linker imparts water solubility and reduced immunogenicity to the target molecule. Compared to reagents containing only hydrocarbon spacers, dPEG-containing reagents also reduce aggregation and precipitation of crosslinked proteins. The acetyl group is easily removed by mild chemical deprotection with hydroxylamine hydrochloride, exposing the free thiol, which can then be used to form a disulfide or thiol ether bond to another molecule. Although commonly used with proteins, these reagents are also suitable for any small molecules or peptides with suitable functionalities.