Rapid Cross-Metathesis for Reversible Protein Modifications via Chemical Access to <i>Se</i>-Allyl-selenocysteine in Proteins
作者:Yuya A. Lin、Omar Boutureira、Lukas Lercher、Bhaskar Bhushan、Robert S. Paton、Benjamin G. Davis
DOI:10.1021/ja403191g
日期:2013.8.21
bioconjugations. This use of Se-relayed Seac CM on proteins has now enabled reactions with substrates (allyl GlcNAc, N-allyl acetamide) that were previously not possible for the corresponding sulfur analogue. This CM strategy was applied to histone proteins to install a mimic of acetylated lysine (KAc, an epigenetic marker). The resulting synthetic H3 was successfully recognized by antibody that binds natural
交叉复分解 (CM) 最近已成为蛋白质修饰的可行策略。在这里,通过脱氢丙氨酸对易位反应性氨基酸底物 Se-烯丙基-硒代半胱氨酸 (Seac) 进行仿生化学访问,证明了有效的蛋白质 CM。蛋白反应动力学揭示了一种快速反应,Seac 介导的 CM 的速率常数与许多当前生物偶联物的蛋白外速率相当或更好。这种在蛋白质上使用 Se-relayed Seac CM 现在已经能够与底物(烯丙基 GlcNAc、N-烯丙基乙酰胺)发生反应,这在以前对于相应的硫类似物是不可能的。这种 CM 策略应用于组蛋白以安装乙酰化赖氨酸(KAc,一种表观遗传标记)的模拟物。由此产生的合成 H3 被结合天然 H3-K9Ac 的抗体成功识别。而且,
Synthesis of selenium-containing bicyclic β-lactams via alkene metathesis
作者:Dinesh R. Garud、Deepali D. Garud、Mamoru Koketsu
DOI:10.1039/b902698c
日期:——
The stereoselective insertion of allyl-seleno moieties at the C(4) position of azetidinones and further ring-closing metathesis afforded novel selenium-containing bicyclic β-lactams.