Abstract:
:Human adenoviruses (HAdVs) shut down host cellular cap-dependent mRNA translation while initiating the translation of viral late mRNAs in a cap-independent manner. HAdV 5' untranslated regions (5'UTRs) are crucial for cap-independent initiation, and influence mRNA localization and stability. However, HAdV translational regulation remains relatively uncharacterized. The HAdV tripartite leader (TPL), composed of three introns (TPL 1-3), is critical to the translation of HAdV late mRNA. Herein, we annotated and analyzed 72 HAdV genotypes for the HAdV TPL and another previously described leader, the i-leader. Using HAdV species D, type 37 (HAdV-D37), we show by reverse transcription PCR and Sanger sequencing that mRNAs of the HAdV-D37 E3 transcription unit are spliced to the TPL. We also identified a polycistronic mRNA for RID-α and RID-β. Analysis of the i-leader revealed a potential open reading frame within the leader sequence and the termination of this potential protein in TPL3. A potential new leader embedded within the E3 region was also detected and tentatively named the j-leader. These results suggest an underappreciated complexity of post-transcriptional regulation, and the importance of HAdV 5'UTRs for precisely coordinated viral protein expression along the path from genotype to phenotype.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Ramke M,Lee JY,Dyer DW,Seto D,Rajaiya J,Chodosh Jdoi
10.1038/s41598-017-00747-ysubject
Has Abstractpub_date
2017-04-04 00:00:00pages
618issue
1issn
2045-2322pii
10.1038/s41598-017-00747-yjournal_volume
7pub_type
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