Carbene Footprinting Reveals Binding Interfaces of a Multimeric Membrane-Spanning Protein
作者:Lucio Manzi、Andrew S. Barrow、Jonathan T. S. Hopper、Renata Kaminska、Colin Kleanthous、Carol V. Robinson、John E. Moses、Neil J. Oldham
DOI:10.1002/anie.201708254
日期:2017.11.20
Mapping the interaction sites between membrane‐spanning proteins is a key challenge in structural biology. In this study a carbene‐footprinting approach was developed and applied to identify the interfacial sites of a trimeric, integral membrane protein, OmpF, solubilised in micelles. The diazirine‐based footprinting probe is effectively sequestered by, and incorporated into, the micelles, thus leading
绘制跨膜蛋白之间的相互作用位点是结构生物学中的关键挑战。在这项研究中,开发了卡宾足迹法,并将其应用于识别溶解在胶束中的三聚体完整膜蛋白OmpF的界面位点。基于二嗪胺的足迹探针可被胶束有效隔离,并掺入胶束中,从而在349 nm辐射下有效标记蛋白质的跨膜区域。三聚体亚基之间与蛋白质-蛋白质相互作用相关的区域仍未标记,从而揭示了它们的位置。