@article{mbs:/content/journal/jgv/10.1099/0022-1317-75-3-657, author = "Grund, Christian H. and Lechman, Eric R. and Issel, Charles J. and Montelaro, Ronald C. and Rushlow, Keith E.", title = "Lentivirus cross-reactive determinants present in the capsid protein of equine infectious anaemia virus", journal= "Journal of General Virology", year = "1994", volume = "75", number = "3", pages = "657-662", doi = "https://doi.org/10.1099/0022-1317-75-3-657", url = "https://www.microbiologyresearch.org/content/journal/jgv/10.1099/0022-1317-75-3-657", publisher = "Microbiology Society", issn = "1465-2099", type = "Journal Article", abstract = "In this study we used immune sera from equine infectious anaemia virus (EIAV)-infected horses which uniquely display broad reactivity with different lentivirus capsid proteins (CA) to characterize the cross-reactive determinants of lentivirus CA proteins. In particular, the role of the major homology region (MHR) of lentivirus CA proteins in this serological cross-reactivity was evaluated using both equine immune serum and murine monoclonal antibodies (MAbs) directed against the MHR segment of different lentiviruses. The results of our studies indicate that about 80 %; of sera from long-term experimentally infected ponies or naturally infected horses react with human immunodeficiency virus type 1 CA in Western immunoblot assays. In addition, the cross-reactive determinants on the EIAV CA were localized within the immunodominant carboxyl terminus of the protein (residues 277 to 367). However, the crossreactive determinants recognized by the equine sera do not appear to correlate with linear peptides from the carboxyl terminus of the EIAV CA, including the MHR. These results suggest cross-reactivity between more distant lentiviruses is associated with non-linear determinants. In contrast, MHR-specific MAbs did react with linear peptides by ELISA and distinguished the primate lentiviruses from EIAV and feline immunodeficiency virus. These data support the concept of a highly conserved structural and antigenic organization among the CA proteins of lentiviruses from different species.", }