Abstract
The genomic localization of two immunodominant genes encoding two proteins of the Epstein-Barr virus capsid antigen (VCA) complex, VCA-p18 and VCA-p40, has been identified. For that purpose, lambda gt11-based cDNA libraries were constructed from HH514.c16 cells induced for virus production. The libraries were screened with a monoclonal antibody, EBV.OT41A, directed against VCA-p40 or with affinity-purified human antibodies against VCA-p18. Sequencing of the inserts of positive plaques showed that VCA-p18 and VCA-p40 are encoded within open reading frames (ORFs) BFRF3 and BdRF1, respectively. Peptide scanning analysis of the predicted protein of ORF BdRF1 resulted in defining the epitope of monoclonal antibody EBV.OT41A at the C-terminal region. The dominant VCA-p18 reactivity of human sera can be completely inhibited by preadsorption with Escherichia coli-expressed BFRF3-beta-galactosidase. Serum of a rabbit immunized with BFRF3-beta galactosidase reacts with a VCA-specific protein of 18 kDa. In addition, BFRF3-beta-galactosidase affinity-purified antibodies react with VCA-p18 of virus-producing cells (HH514.c16). Complete inhibition of viral DNA polymerase activity by phosphonoacetic acid is associated with the absence of RNAs and protein products of both ORFs, indicating that VCA-p18 and VCA-p40 are true late antigens.
MeSH Terms
Amino Acid Sequence
Antibodies, Monoclonal/immunology
Antibodies, Viral/immunology
Antigens, Viral/genetics,immunology
Base Sequence
Blotting, Western
Capsid/genetics,immunology
Capsid Proteins
Cloning, Molecular
Epitopes
Escherichia coli
Genes, Viral
Herpesvirus 4, Human/genetics,immunology
Molecular Sequence Data
Oligodeoxyribonucleotides/chemistry
RNA, Viral/genetics
Viral Structural Proteins/genetics
Chemicals
Antibodies, Monoclonal
Antibodies, Viral
Antigens, Viral
Capsid Proteins
Epitopes
Epstein-Barr viral capsid antigen
Oligodeoxyribonucleotides
RNA, Viral
Viral Structural Proteins
Authors & Affiliations
5 authors, click to expand affiliations / ORCID
van Grunsven W M
Biotechnological Research Unit, Organon Teknika, RM Boxtel, The Netherlands.
van Heerde E C
de Haard H J
Spaan W J
Middeldorp J M
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