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  • Title: Defective Marek's disease virus DNA contains a gene encoding a potential nuclear DNA binding protein and a HSV a-like sequence.
    Author: Camp HS, Silva RF, Coussens PM.
    Journal: Virology; 1993 Oct; 196(2):484-95. PubMed ID: 8396799.
    Abstract:
    Four RNA transcripts from chicken embryo fibroblast cells infected with Marek's disease virus (MDV) strain 281Ml/1 hybridized to the 4-kbp MDV replicon DNA. In an attempt to identify open reading frames coding for the four transcripts, we determined the nucleotide sequences of 4-kbp replicon DNA (represents a single monomeric repeat unit of defective MDV genome). Computer analysis indicates that the 4-kbp MDV replicon DNA contains two intact open reading frames (ORFs) with common promoter regulatory elements. ORF-A codes for a putative 204 amino acid protein that shares 21 and 36% amino acid sequence identity to nuclear DNA binding proteins such as the EBNA-1 of Epstein-Barr virus and galline, a chicken sperm histone protein, respectively. ORF-B encodes for a potential 350 amino acid protein, which did not show any significant amino acid sequence identity to known protein sequences within Swiss-Protein data base. ORF-B may, therefore, encode a MDV specific protein. The 5'-region of MDV replicon DNA revealed seven reiterated copies of an 11-bp motif sharing 8 out of 11 nucleotide sequence identity to DR2 elements of the herpes simplex virus strain USA-8 a sequence.
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