Cloning the Horse RNA Polymerase I Promoter and Its Application to Studying Influenza Virus Polymerase Activity.
Abstract: An influenza virus polymerase reconstitution assay based on the human, dog, or chicken RNA polymerase I (PolI) promoter has been developed and widely used to study the polymerase activity of the influenza virus in corresponding cell types. Although it is an important member of the influenza virus family and has been known for sixty years, no studies have been performed to clone the horse PolI promoter or to study the polymerase activity of equine influenza virus (EIV) in horse cells. In our study, the horse RNA PolI promoter was cloned from fetal equine lung cells. Using the luciferase assay, it was found that a 500 bp horse RNA PolI promoter sequence was required for efficient transcription. Then, using the developed polymerase reconstitution assay based on the horse RNA PolI promoter, the polymerase activity of two EIV strains was compared, and equine myxovirus resistance A protein was identified as having the inhibiting EIV polymerase activity function in horse cells. Our study enriches our knowledge of the RNA PolI promoter of eukaryotic species and provides a useful tool for the study of influenza virus polymerase activity in horse cells.
Publication Date: 2016-05-31 PubMed ID: 27258298PubMed Central: PMC4926170DOI: 10.3390/v8060119Google Scholar: Lookup
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- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
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This research article revolves around the cloning of horse RNA Polymerase I (PolI) promoter and its application in evaluating the polymerase activity of the equine influenza virus in horse cells.
Cloning of the Horse RNA PolI Promoter
- In this study, the horse RNA PolI promoter was cloned from fetal equine lung cells. This is a significant step as until now, no studies had been conducted to clone the horse PolI promoter.
- The cloning of the horse RNA PolI promoter expands our understanding of the RNA PolI promoter in eukaryotic species, which are organisms whose cells have a nucleus enclosed within membranes. This includes animals, plants and fungi.
Studying Equine Influenza Virus Polymerase Activity
- Previously, a reconstitution assay based on the human, dog or chicken RNA PolI promoter has been used to study the polymerase activity of the influenza virus in corresponding cell types.
- In this research, a similar polymerase reconstitution assay, but based on the newly cloned horse RNA PolI promoter, was developed for studying the polymerase activity of the equine influenza virus (EIV) in horse cells.
- The relative activity of two EIV strains was compared using this novel assay.
Identifying the Inhibition Function of Equine Myxovirus Resistance A Protein
- Furthermore, the research identified the protein “equine myxovirus resistance A” as having the ability to inhibit EIV polymerase activity in horse cells.
- This discovery can provide valuable input in the study of the response of horse cells to EIV and may guide future development of remedies or preventatives against EIV.
Further Implication of the Study
- This study not only provides deeper insights about RNA PolI promoters among eukaryotes, but it also offers a useful tool for future research on influenza virus polymerase activity in horse cells.
- This opens new avenues for better understanding and treating influenza viruses, particularly the ones impacting equine species.
Cite This Article
APA
Lu G, He D, Wang Z, Ou S, Yuan R, Li S.
(2016).
Cloning the Horse RNA Polymerase I Promoter and Its Application to Studying Influenza Virus Polymerase Activity.
Viruses, 8(6), 119.
https://doi.org/10.3390/v8060119 Publication
Researcher Affiliations
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510000, China. 18814113742@163.com.
- Key Laboratory of Comprehensive Prevention and Control for Severe Clinical Animal Diseases of Guangdong Province, Guangzhou 510000, China. 18814113742@163.com.
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510000, China. donghe9108@163.com.
- Key Laboratory of Comprehensive Prevention and Control for Severe Clinical Animal Diseases of Guangdong Province, Guangzhou 510000, China. donghe9108@163.com.
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510000, China. lugang19860501@163.com.
- Key Laboratory of Comprehensive Prevention and Control for Severe Clinical Animal Diseases of Guangdong Province, Guangzhou 510000, China. lugang19860501@163.com.
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510000, China. whj751364486@163.com.
- Key Laboratory of Comprehensive Prevention and Control for Severe Clinical Animal Diseases of Guangdong Province, Guangzhou 510000, China. whj751364486@163.com.
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510000, China. jeremyjessica@163.com.
- Key Laboratory of Comprehensive Prevention and Control for Severe Clinical Animal Diseases of Guangdong Province, Guangzhou 510000, China. jeremyjessica@163.com.
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510000, China. shoujunli@scau.edu.cn.
- Key Laboratory of Comprehensive Prevention and Control for Severe Clinical Animal Diseases of Guangdong Province, Guangzhou 510000, China. shoujunli@scau.edu.cn.
MeSH Terms
- Animals
- Cell Line
- Cloning, Molecular
- DNA-Directed RNA Polymerases / genetics
- DNA-Directed RNA Polymerases / metabolism
- Horses
- Influenza A virus / enzymology
- Influenza A virus / physiology
- Promoter Regions, Genetic
- RNA Polymerase I / genetics
- Transcription, Genetic
- Virus Replication
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Citations
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