Monitoring the kinetics of the pH-driven transition of the anthrax toxin prepore to the pore by biolayer interferometry and surface plasmon resonance.
炭疽保护性抗原(PA)前孔七聚体的第2结构域在内体酸化过程中发生展开与再折叠,形成可插入内体膜的约100 Å β桶状孔,并促进致死因子(LF)和/或水肿因子(EF)从内体向细胞质转位。作者构建了PA前孔与LF结合域LFN的固定化复合物,利用表面等离子共振(SPR)和生物层干涉(BLI)实时监测前孔向孔转变的动力学。当溶液pH从7.5...