Tyrosine Bioconjugation through Aqueous Ene-Like Reactions
申请人:Barbas, III Carlos F.
公开号:US20120289682A1
公开(公告)日:2012-11-15
A new and versatile class of cyclic diazodicarboxamides that reacts efficiently and selectively with phenols and the phenolic side chain of tyrosine through an Ene-like reaction is reported. This mild aqueous tyrosine ligation reaction works over a broad pH range and expands the repertoire of aqueous chemistries available for small molecule, peptide, and protein modification. The tyrosine ligation reactions are shown to be compatible with the labeling of native enzymes and antibodies in buffered aqueous solution. This reaction provides a novel synthetic approach to bispecific antibodies. This reaction will find broad utility in peptide and protein chemistry and in the chemistry of phenol-containing compounds.
Thermally Triggered Triazolinedione–Tyrosine Bioconjugation with Improved Chemo- and Site-Selectivity
作者:Elias Denijs、Kamil Unal、Kevin Bevernaege、Sabah Kasmi、Bruno G. De Geest、Johan M. Winne
DOI:10.1021/jacs.4c02173
日期:2024.5.8
electrochemical bioorthogonal bond-forming methods, not only avoids the classical synthesis and handling difficulties of these highly reactive click-like reagents but also markedly improves the selectivity profile of the tyrosine conjugation reaction itself. It avoids oxidative damage and “off-target” tryptophan labeling, and it even improves site-selectivity in discriminating between different tyrosine
据报道,一种生物共轭策略允许通过基于三唑啉二酮的“Y-点击”衍生酪氨酸侧链。与经典的三唑啉二酮试剂相比,开发了封闭的三唑啉二酮试剂,该试剂可以在使用前纯化,可以长期保存,并允许使用更广泛的货物和标签进行功能化。这些试剂在室温下是稳定的,但在生理 pH 值的缓冲介质中加热至 40 °C 时会稳定释放高反应性三唑啉二酮,在 0 至 40 °C 范围内表现出尖锐的温度响应。这种概念上有趣的策略是对现有光或电化学生物正交成键方法的补充,不仅避免了这些高反应性点击样试剂的经典合成和处理困难,而且还显着提高了酪氨酸缀合反应本身的选择性。 。它避免了氧化损伤和“脱靶”色氨酸标记,甚至提高了区分同一蛋白质或不同多肽链上不同酪氨酸侧链的位点选择性。在这篇研究文章中,我们描述了这些试剂的逐步发展,从它们的简短和模块化合成到小分子模型生物共轭研究以及肽和蛋白质的原理验证生物正交化学。
The Enzyme-Inhibitor Dissociation Constants of α-Chymotrypsin and Three Enantiomorphic Pairs of Competitive Inhibitors<sup>1</sup>