Previous Article | Next Article ![]()
J. Virol., Nov 1995, 6751-6757, Vol 69, No. 11
UR de Verdugo, HC Selinka, M Huber, B Kramer, J Kellermann, PH Hofschneider and R Kandolf
Viral infection of host cells primarily depends on binding of the virus to
a specific cell surface protein. In order to characterize the binding
protein for group B coxsackieviruses (CVB), detergent- solubilized membrane
proteins of different cell lines were tested in virus overlay
protein-binding assays. A prominent virus-binding protein with a molecular
mass of 100 kDa was detected in various CVB-permissive human and monkey
cell lines but was not detected in nonpermissive cell lines. The
specificity of CVB binding to the 100-kDa protein on permissive human cells
was substantiated by binding of all six serotypes of CVB and by competition
experiments. In contrast, poliovirus and Sendai virus did not bind to the
100-kDa CVB-specific protein. A fraction of HeLa membrane proteins enriched
in the range of 100 kDa showed functional activity by transforming
infectious CVB (160S) into A-particles (135S). In order to purify this
CVB-binding protein, solubilized membrane proteins from HeLa cells were
separated by preparative sodium dodecyl sulfate-polyacrylamide gel
electrophoresis followed by elution of the 100-kDa protein. Amino acid
sequence analysis of tryptic fragments of the CVB-binding protein indicated
that this 100-kDa CVB-specific protein is a cell surface protein related to
nucleolin. These results were confirmed by immunoprecipitations of the
CVB-binding protein with nucleolin-specific antibodies, suggesting that a
nucleolin-related membrane protein acts as a specific binding protein for
the six serotypes of CVB.
Copyright © 1995, American Society for Microbiology
Characterization of a 100-kilodalton binding protein for the six serotypes of coxsackie B viruses
Max-Planck-Institute for Biochemistry, Martinsried, Germany.
This article has been cited by other articles:
Copyright © 2009 by the American Society for Microbiology. For an alternate route to Journals.ASM.org, visit: http://intl-journals.asm.org | More Info»