Abstract
Replication of human adenovirus (Ad) DNA requires three virus-encoded proteins that are coordinately transcribed from a single promoter at early times after infection. The mRNAs for two of these proteins, the precursor to the terminal protein (pTP) and the Ad DNA polymerase (Ad Poll, share several exons, including one encoded near Ad genome coordinate 39. The positions of the splice points of these mRNAs have been mapped by S1 nuclease mapping, by RNA sequencing, and by cDNA cloning. As a result of RNA splicing events, a short open reading frame (ORF) encoded at genome coordinate 39 is connected to the beginning of both the pTP and Ad Pol coding sequences; inclusion of this upstream ORF is essential for expression of functional pTP and Ad Pol proteins.
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