Chemoselective, biocompatible ligation reactions are the key components for efficient and modular access to biomolecular scaffolds. Tetrazine ligation leads to the formation of a mixture of isomers, which makes reaction monitoring, purification and characterization of conjugates difficult. We report herein a modified tetrazine ligation strategy based on the use of a pyrazolone coupling partner, which
Selective Modification of Ribosomally Synthesized and Post‐Translationally Modified Peptides (RiPPs) through Diels–Alder Cycloadditions on Dehydroalanine Residues
作者:Reinder H. Vries、Jakob H. Viel、Ruben Oudshoorn、Oscar P. Kuipers、Gerard Roelfes
DOI:10.1002/chem.201902907
日期:2019.10
late‐stage chemical modification of ribosomally synthesized and post‐translationally modified peptides (RIPPs) by Diels–Alder cycloadditions to naturally occurring dehydroalanines. The tail region of the thiopeptide thiostrepton could be modified selectively and efficiently under microwave heating and transition‐metal‐free conditions. The Diels–Alder adducts were isolated and the different site‐ and endo/exo
我们报道了Diels–Alder环加成反应对天然脱氢丙氨酸进行核糖体合成和翻译后修饰的肽(RIPPs)的后期化学修饰。在微波加热和无过渡金属的条件下,硫肽硫代链霉菌素的尾部区域可以有选择地进行有效修饰。分离出Diels–Alder加合物,并通过1D / 2D 1鉴定出不同的位点和内/外异构体1 H NMR。通过对硫肽诺西肽和瘦肽乳链菌肽Zinin Z的有效修饰,建立了该方法的通用性。纯化的硫代链球菌Diels-Alder产品对硫代链球菌敏感菌株的最低抑菌浓度(MIC)测定显示出与天然硫代链球菌相当的高活性。这些Diels–Alder产品还成功地与各种功能化的四嗪进行了逆电子需求的Diels–Alder反应,证明了该方法在标记RIPPs上的实用性。
Genetic Encoding of Bicyclononynes and <i>trans</i>-Cyclooctenes for Site-Specific Protein Labeling in Vitro and in Live Mammalian Cells via Rapid Fluorogenic Diels–Alder Reactions
作者:Kathrin Lang、Lloyd Davis、Stephen Wallace、Mohan Mahesh、Daniel J. Cox、Melissa L. Blackman、Joseph M. Fox、Jason W. Chin
DOI:10.1021/ja302832g
日期:2012.6.27
site-specific labeling of proteins with diverse probes remains an outstanding challenge for chemical biologists. Enzyme-mediated labeling approaches may be rapid but use protein or peptide fusions that introduce perturbations into the protein under study and may limit the sites that can be labeled, while many “bioorthogonal” reactions for which a component can be geneticallyencoded are too slow to effect
Fast and pH‐Independent Elimination of
<i>trans</i>
‐Cyclooctene by Using Aminoethyl‐Functionalized Tetrazines
作者:Alexi J. C. Sarris、Thomas Hansen、Mark A. R. de Geus、Elmer Maurits、Ward Doelman、Herman S. Overkleeft、Jeroen D. C. Codée、Dmitri V. Filippov、Sander I. van Kasteren
DOI:10.1002/chem.201803839
日期:2018.12.5
The inverse‐electron‐demandDiels–Alder/pyridazine elimination tandem reaction, in which the allylic substituent on trans‐cyclooctene is eliminated following reaction with tetrazines, is gaining interest as a versatile bioorthogonal process. One potential shortcoming of such currently usedreactions is their propensity to proceed faster and more efficiently at lower pH, a feature caused by the nature
A facile, efficient and metal‐free synthetic approach to 3‐monosubstituted unsymmetrical 1,2,4,5‐tetrazines is presented. Dichloromethane (DCM) is for the first time recognized as a novel reagent in the synthetic chemistry of tetrazines. Using this novel approach 11 3‐aryl/alkyl 1,2,4,5‐tetrazines were prepared in excellent yields (up to 75 %). The mechanism of this new reaction, including the role