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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Structural and functional characterization of a cell surface binding protein of vaccinia virus.

The nature of the interaction between the enveloped DNA-containing poxviruses and the surfaces of host cells as a first step in virus infection is not known. In this investigation we have identified and defined structural and functional properties of a 32-kDa protein of vaccinia virus. This protein is part of the virus envelope and binds to the cell surface of various cultured cells. The gene encoding the 32-kDa viral protein was mapped and sequenced. It was found to code a 35,426-Da protein with a large N-terminal domain with sequence homology to carbonic anhydrases and a C-terminal domain with sequences similar to those of the attachment glycoprotein VP7 of rotavirus and to transmembrane proteins. A potential cell surface binding domain was within the last 50 amino acid residues of the C terminus. The 32-kDa protein is basic, predicted pI 8.67, is synthesized at late times post-infection, may form dimers held by disulfide bonds at the single cysteine 262, and is apparently non-glycosylated. The 32-kDa protein is a vaccinia virus antigen, with predicted antigenic sites located near amino acids 108-110 (carbonic anhydrase domain) and 298-299 (transmembrane domain). Several lines of evidence suggest that the 32-kDa protein is needed for efficient virus replication in cultured cells but that in addition to this protein other viral proteins are involved in the process of virus entry into cells.[1]


  1. Structural and functional characterization of a cell surface binding protein of vaccinia virus. Maa, J.S., Rodriguez, J.F., Esteban, M. J. Biol. Chem. (1990) [Pubmed]
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