TY - JOUR
T1 - Kinetics of influenza virus fusion with the endosomal and plasma membranes of cultured cells. Effect of temperature
AU - Nunes-Correia, I.
AU - Nir, S.
AU - Pedroso De Lima, M. C.
PY - 2003/9/1
Y1 - 2003/9/1
N2 - We performed a detailed kinetic analysis of influenza virus fusion with the endosomal and plasma membranes of Madin Darby canine kidney (MDCK) cells and provided a comparison of the kinetic parameters obtained for both cases at 20°C and 37°C. Using our mass action kinetic model, we determined that the fusion rate constant, f, for influenza virus with the endosomal membrane was 0.02 s-1 at 37°C and 0.0035 s-1 at 20°C. The analysis of the fusion kinetics of influenza virus with the plasma membrane yielded that the fusion rate constants were close to those deduced with the endosomal membrane. The systematic kinetic analysis performed in this study provides for the first time a biophysical support for studies on influenza virus-cell fusion where the acidic endosomal internal environment is simulated artificially by lowering the pH of the medium.
AB - We performed a detailed kinetic analysis of influenza virus fusion with the endosomal and plasma membranes of Madin Darby canine kidney (MDCK) cells and provided a comparison of the kinetic parameters obtained for both cases at 20°C and 37°C. Using our mass action kinetic model, we determined that the fusion rate constant, f, for influenza virus with the endosomal membrane was 0.02 s-1 at 37°C and 0.0035 s-1 at 20°C. The analysis of the fusion kinetics of influenza virus with the plasma membrane yielded that the fusion rate constants were close to those deduced with the endosomal membrane. The systematic kinetic analysis performed in this study provides for the first time a biophysical support for studies on influenza virus-cell fusion where the acidic endosomal internal environment is simulated artificially by lowering the pH of the medium.
KW - Endocytosis
KW - Influenza virus
KW - Kinetic analysis
KW - MDCK cells
KW - Membrane fusion
UR - http://www.scopus.com/inward/record.url?scp=0141540481&partnerID=8YFLogxK
U2 - 10.1007/s00232-003-2040-x
DO - 10.1007/s00232-003-2040-x
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C2 - 14502422
AN - SCOPUS:0141540481
SN - 0022-2631
VL - 195
SP - 21
EP - 26
JO - Journal of Membrane Biology
JF - Journal of Membrane Biology
IS - 1
ER -