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Dveksler, G.S. et al.

Mouse hepatitis virus strain A59 and blocking antireceptor monoclonal antibody bind to the N-terminal domain of cellular receptor.

Mouse hepatitis virus (MHV) strain A59 uses as cellular receptors members of the carcinoembryonic antigen family in the immunoglobulin superfamily. Recombinant receptor proteins with deletions of whole or partial immunoglobulin domains were used to identify the regions of receptor glycoprotein recognized by virus and by antireceptor monoclonal antibody CC1, which blocks infection of murine cells. Monoclonal antibody CC1 and MHV-A59 virions bound only to recombinant proteins containing the entire first domain of MHV receptor. To determine which of the proteins could serve as functional virus receptors, receptor-negative hamster cells were transfected with recombinant deletion clones and then challenged with MHV-A59 virions. Receptor activity required the entire N-terminal domain with either the second or the fourth domain and the transmembrane and cytoplasmic domains. Recombinant proteins lacking the first domain or its C-terminal portion did not serve as viral receptors. Thus, like other virus receptors in the immunoglobulin superfamily, including CD4, poliovirus receptor, and intercellular adhesion molecule 1, the N-terminal domain of MHV receptor is recognized by the virus and the blocking monoclonal antibody.[1]

References

Mouse hepatitis virus strain A59 and blocking antireceptor monoclonal antibody bind to the N-terminal domain of cellular receptor. Dveksler, G.S., Pensiero, M.N., Dieffenbach, C.W., Cardellichio, C.B., Basile, A.A., Elia, P.E., Holmes, K.V. Proc. Natl. Acad. Sci. U.S.A. (1993) [Pubmed]

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