The non-structural 1 (NS1) protein plays a crucial role in moderating the virulence of influenza virus by multiple mechanisms. Due to C-terminal ‘tail’ (CTT) truncation of NS1, there are length variation types of NS1 in different subtype influenza viruses. CTT functions in several ways to defeat the cellular innate immune responses. Here, we discuss those different effects of CTT truncation or elongation of NS1 protein in different genetic backgrounds of influenza experimentations. Conclusively, it can be stated that CTT confers a positive role during the infection of influenza A viruses. However, this regulation is contributed by multiple factors and has variable impact on the pathobiology of influenza A viruses.
Mini-Review · 8 December 2014 · Open Access
Biological Relevance of C-terminal Elongation of the NS1 Protein of Influenza A Viruses
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Affiliations & Notes ⌄
- 1Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, College of Veterinary Medicine, China Agri- cultural University, Beijing 100193, China
- 2China Rural Technology Development Center, Beijing, 100045, China
Article Info ⌄
- Journal:
- Hosts and Viruses
- Published:
- 8 December 2014

From the article
- Biological Relevance of C-terminal Elongation of the NS1 Protein of Influenza A Viruses.
- These findings suggested that the C-terminal tail of the NS1 protein modulates the viral virulence of classical H1N1 swine influenza virus to some extent.
- A new influenza virus virulence determinant: the NS1 protein four C-terminal residues modulate pathogencity.
- The PDZ-binding motif of the avian NS1 protein affects transmission of the 2009 influenza A (H1N1) virus.
Selected from the article's own text.
Abstract
Acknowledgments
This work was supported by the National Natural Science Foundation of China (no. 31172323 and no. 31172324).
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