当前位置:
X-MOL 学术
›
ACS Chem. Biol.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Thiol Probes To Detect Electrophilic Natural Products Based on Their Mechanism of Action
ACS Chemical Biology ( IF 3.5 ) Pub Date : 2016-06-28 00:00:00 , DOI: 10.1021/acschembio.5b00924
Gabriel Castro-Falcón 1 , Dongyup Hahn 1 , Daniela Reimer 1 , Chambers C. Hughes 1
ACS Chemical Biology ( IF 3.5 ) Pub Date : 2016-06-28 00:00:00 , DOI: 10.1021/acschembio.5b00924
Gabriel Castro-Falcón 1 , Dongyup Hahn 1 , Daniela Reimer 1 , Chambers C. Hughes 1
Affiliation
![]() |
New methods are urgently needed to find novel natural products as structural leads for the development of new drugs against emerging diseases such as cancer and multiresistant bacterial infections. Here we introduce a reactivity-guided drug discovery approach for electrophilic natural products, a therapeutically relevant class of natural products that covalently modify their cellular targets, in crude extracts. Using carefully designed halogenated aromatic reagents, the process furnishes derivatives that are UV-active and highly conspicuous via mass spectrometry by virtue of an isotopically unique bromine or chlorine tag. In addition to the identification of high-value metabolites, the process facilitates the difficult task of structure elucidation by providing derivatives that are primed for X-ray crystallographic analysis. We show that a cysteine probe efficiently and chemoselectively labels enone-, β-lactam-, and β-lactone-based electrophilic natural products (parthenolide, andrographolide, wortmannin, penicillin G, salinosporamide), while a thiophenol probe preferentially labels epoxide-based electrophilic natural products (triptolide, epoxomicin, eponemycin, cyclomarin, salinamide). Using the optimized method, we were able to detect and isolate the epoxide-bearing natural product tirandalydigin from Salinispora and thereby link an orphan gene cluster to its gene product.
更新日期:2016-06-28