Stereoselective synthesis of light-activatable perfluorophenylazide-conjugated carbohydrates for glycoarray fabrication and evaluation of structural effects on protein binding by SPR imaging
作者:Lingquan Deng、Oscar Norberg、Suji Uppalapati、Mingdi Yan、Olof Ramström
DOI:10.1039/c1ob05040k
日期:——
A series of light-activatable perfluorophenylazide (PFPA)-conjugated carbohydrate structures have been synthesized and applied to glycoarray fabrication. The glycoconjugates were structurally varied with respect to anomeric attachment, S-, and O-linked carbohydrates, respectively, as well as linker structure and length. Efficient stereoselective synthetic routes were developed, leading to the formation of the PFPA-conjugated structures in good yields over few steps. The use of glycosyl thiols as donors proved especially efficient and provided the final compounds in up to 70% total yield with high anomeric purities. PFPA-based photochemistry was subsequently used to generate carbohydrate arrays on a polymeric surface, and surface plasmon resonance imaging (SPRi) was applied for evaluation of carbohydrate-protein interactions using the plant lectin Concanavalin A (Con A) as a probe. The results indicate better performance and equal efficiency of S- and O-linked structures with intermediate linker length.
一系列光活化可激活的含全氟苯基叠氮(PFPA)的碳水化合物结构已被合成并应用于糖阵列制造。这些糖缀合物在异头连接、S-连接和O-连接的糖以及连接子结构和长度方面进行了结构上的变化。建立了高效的立体选择性合成路线,通过少数步骤以良好产率形成了PFPA缀合结构。使用糖基硫醇作为供体特别有效,最终化合物总产率高达70%,且具有高异头纯度。随后利用基于PFPA的光化学在聚合物表面生成碳水化合物阵列,并应用表面等离子体共振成像(SPRi)评估碳水化合物与蛋白质的相互作用,以植物凝集素刀豆蛋白A(Con A)作为探针。结果表明,S-连接和O-连接结构在中间链长下表现出更好的性能和相等的效率。