Niles W D, Cohen F S
Department of Physiology, Rush Medical College, Chicago, Illinois 60612.
Biophys J. 1993 Jul;65(1):171-6. doi: 10.1016/S0006-3495(93)81049-X.
The initial steps of membrane fusion, receptor binding and membrane destabilization, are mediated by the envelope glycoprotein hemagglutinin of influenza virus. Interaction between these functions was determined from the time course of individual virion fusions to a planar membrane with and without receptor. With receptor, fusion was described by a Poisson process. In the absence of receptor, the time course was more complicated and could not be described with exponential rate constants. The conversion of a non-Markovian process into a simple Markov chain is direct evidence that receptor binding fundamentally alters the route of fusion.
膜融合、受体结合和膜去稳定化的初始步骤由流感病毒的包膜糖蛋白血凝素介导。这些功能之间的相互作用是根据单个病毒粒子与有或无受体的平面膜融合的时间进程来确定的。有受体时,融合由泊松过程描述。在没有受体的情况下,时间进程更为复杂,无法用指数速率常数来描述。将非马尔可夫过程转化为简单的马尔可夫链直接证明受体结合从根本上改变了融合途径。