Anomalous Behavior of Adenovirus L4-33K Mutant Protein
نویسندگان
چکیده
منابع مشابه
L4-33K, an adenovirus-encoded alternative RNA splicing factor.
Splicing of the adenovirus IIIa mRNA is subjected to a strict temporal regulation during virus infection such that efficient IIIa 3' splice site usage is confined to the late phase of the infectious cycle. Here we show that the adenovirus L4-33K protein functions as a virus-encoded RNA splicing factor that preferentially activates splicing of transcripts with a weak 3' splice site sequence cont...
متن کاملRegulation of Human Adenovirus Alternative RNA Splicing by the Adenoviral L4-33K and L4-22K Proteins
Adenovirus makes extensive use of alternative RNA splicing to produce a complex set of spliced viral mRNAs. Studies aimed at characterizing the interactions between the virus and the host cell RNA splicing machinery have identified three viral proteins of special significance for the control of late viral gene expression: L4-33K, L4-22K, and E4-ORF4. L4-33K is a viral alternative RNA splicing f...
متن کاملThe adenovirus L4-33K protein regulates both late gene expression patterns and viral DNA packaging.
The adenovirus (Ad) L4-33K protein has been linked to disparate functions during infection. L4-33K is a virus-encoded alternative RNA splicing factor which activates splicing of viral late gene transcripts that contain weak 3' splice sites. Additionally, L4-33K has been indicated to play a role in adenovirus assembly. We generated and characterized an Ad5 L4-33K mutant virus to further explore ...
متن کاملThe Human Adenovirus Type 5 L4 Promoter Is Negatively Regulated by TFII-I and L4-33K
UNLABELLED The late phase of adenovirus gene expression is controlled by proteins made in the intermediate phase, including L4 proteins of 22,000- and 33,000-Da apparent molecular mass (L4-22K and -33K proteins) that are expressed initially from the L4 promoter (L4P). The L4P is activated by a combination of viral proteins and cellular p53 and is ultimately inhibited again by its own products. ...
متن کاملAdenovirus serotype 5 L4-22K and L4-33K proteins have distinct functions in regulating late gene expression.
Adenoviruses express up to 20 distinct mRNAs from five major late transcription unit (MLTU) regions, L1 to L5, by differential splicing and polyadenylation of the primary transcript. MLTU expression is regulated at transcriptional and posttranscriptional levels. The L4-33K protein acts as a splicing factor to upregulate several MLTU splice acceptor sites as the late phase progresses. The L4 reg...
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ژورنال
عنوان ژورنال: Acta Scientific Microbiology
سال: 2020
ISSN: 2581-3226
DOI: 10.31080/asmi.2020.03.0588