Native Chemical Ligation of Thioamide-Containing Peptides: Development and Application to the Synthesis of Labeled α-Synuclein for Misfolding Studies
作者:Solongo Batjargal、Yanxin J. Wang、Jacob M. Goldberg、Rebecca F. Wissner、E. James Petersson
DOI:10.1021/ja2113245
日期:2012.6.6
Thioamide modifications of the peptide backbone are used to perturb secondary structure, to inhibit proteolysis, as photoswitches, and as spectroscopic labels. Thus far, their incorporation has been confined to single peptides synthesized on solid phase. We have generated thioamides in C-terminal thioesters or N-terminal Cys fragments and examined their compatibility with native chemical ligation conditions
肽主链的硫代酰胺修饰用于扰乱二级结构、抑制蛋白水解、作为光开关和光谱标记。到目前为止,它们的掺入仅限于固相合成的单一肽。我们在 C 端硫酯或 N 端 Cys 片段中生成了硫代酰胺,并检查了它们与天然化学连接条件的相容性。大多数序列变体可以与 TCEP 或 DTT 作为还原剂以良好的产率偶联,但在延长 TCEP 孵育时观察到一些副产物。此外,我们发现硫代酰胺与 N 末端 Cys 的噻唑烷保护相容,因此可以使用多重连接来构建更大的蛋白质。由于硫代酰胺的酸不稳定性阻碍了使用 Boc 化学在树脂上合成硫酯,因此我们设计了一种合成硫代酰胺肽的方法,该方法具有原位显示的掩蔽 C 末端硫酯。最后,我们证明,通过合成用于蛋白质折叠研究的淀粉样蛋白 α-突触核蛋白的标记版本,硫代酰胺肽可以与表达的蛋白质片段偶联,生成带有主链硫代酰胺标记的大蛋白质。在原理验证实验中,我们证明硫代酰胺的荧光猝灭可用于跟踪标记的
Microparticle Matrix Encoding of Beads
作者:Morten Meldal、Søren Flygering Christensen
DOI:10.1002/anie.200906563
日期:2010.5.3
Reloaded matrix: Facile optical encoding of polyethylene glycol (PEG) based resins provides a direct identification of compounds in combinatorial libraries, and the structures may be correlated with bioactivity. The new technique, microparticlematrix (MPM) encoding (see picture), circumvents some problems often encountered in solid‐phase combinatorial chemistry and is extremely simple to implement
Selection of DNA‐Encoded Dynamic Chemical Libraries for Direct Inhibitor Discovery
作者:Yuqing Deng、Jianzhao Peng、Feng Xiong、Yinan Song、Yu Zhou、Jianfu Zhang、Fong Sang Lam、Chao Xie、Wenyin Shen、Yiran Huang、Ling Meng、Xiaoyu Li
DOI:10.1002/anie.202005070
日期:2020.8.24
that can identify full ligand structures from large‐scale DEDLs. This method is also able to convert unbiased libraries into focused ones targeting specific protein classes. We demonstrated this method by selecting DEDLs against five proteins, and novel inhibitors were identified for all targets. Notably, several selective BD1/BD2 inhibitors were identified from the selections against bromodomain 4 (BRD4)
Development of Low Molecular Weight HIV-1 Protease Dimerization Inhibitors
作者:You Seok Hwang、Jean Chmielewski
DOI:10.1021/jm049581j
日期:2005.3.1
The role of HIV protease in viral replication has made it a significant target for inhibition. The focus of our studies is to target the dimerization interface of HIV-1 protease because disruption of the dimer will inhibit enzymatic activity. The initial strategy began with cross-linked peptides derived from the interface of HIV protease. Herein we describe the design of a focused library of agents