Azido‐Desferrioxamine Siderophores as Functional Click‐Chemistry Probes Generated in Culture upon Adding a Diazo‐Transfer Reagent
作者:Michael P. Gotsbacher、Rachel Codd
DOI:10.1002/cbic.201900661
日期:2020.5.15
azide groups to enable downstream click chemistry. Initial studies trialed a precursor-directed biosynthesis (PDB) approach. Supplementing Streptomyces pilosus culture with blunt-end azido/amine non-native substrates designed to replace 1,5-diaminopentane as the native diamine substrate in the terminal amine position of DFOB did not produce azido-DFOB. Addition of the diazo-transfer reagent imidazole-1-sulfonyl
这项工作旨在进行细菌去铁氧胺(DFO)铁载体的端胺基团(包括去铁胺B(DFOB))的原位转化为叠氮基团的操作,以实现下游点击化学反应。最初的研究试用了前驱体定向生物合成(PDB)方法。用钝端叠氮基/胺非天然底物补充毛链霉菌培养物以取代1,5-二氨基戊烷作为DFOB末端胺位置的天然二胺底物不会产生叠氮基-DFOB。将重氮转移试剂咪唑-1-磺酰叠氮化硫酸氢盐添加到已在1,4-二氨基丁烷存在下培养的废毕赤酵母培养基中,作为可行的天然底物以扩展天然DFO型铁载体的套件,成功生成了相关的azido-DFO类似物套件。这种最少加工的混合物与适当的带有炔烃的生物素试剂之间的CuI介导的或菌株促进的CuI无点击化学反应产生了相关的1,4-二取代的三唑连接的DFO-生物素化合物作为潜在的分子探针,检测为FeIII负载的物种。通过直接添加重氮转移试剂以传递功能性点击化学试剂,将复杂混合物中的含胺天然产物进行胺