Journal
JOURNAL OF VIROLOGY
Volume 84, Issue 2, Pages 1193-1197Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/JVI.01961-09
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Funding
- NIAID [AI46458, AI56310]
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Alternative splicing of adeno-associated virus type 2 (AAV2) P19-generated pre-mRNAs generates the small Rep proteins Rep52 and Rep40, which differ in their carboxyl termini. Both proteins are required for optimal packaging of AAV2 genomes. AAV5 Rep-encoding P19-generated transcripts are primarily polyadenylated within the central intron and not efficiently spliced; however, surprisingly, AAV5 was found to generate high levels of a Rep40-like protein. The AAV5 Rep40-like protein was generated by internal initiation and has the same C terminus as Rep52. Although precluded from using alternative splicing to generate multiple Rep isoforms, AAV5 ensures the production of a Rep40-like protein by utilizing a novel internal translation initiation event.
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