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Structure and function of influenza virus NS1 and NS2 proteins

Enami, M.

Nihon Rinsho. Japanese Journal of Clinical Medicine 55(10): 2605-2609

1997

ISSN/ISBN: 0047-1852
PMID: 9360379
Document Number: 482705
This review discusses the structure and function of the influenza virus NS1 and NS2 proteins. The NS1 is a phosphoprotein and has two nuclear localization signals. In the nucleus, the NS1 interferes with the splicing as well as the nuclear export of cellular mRNAs. In the later time of the infection, the NS1 is present in the cytoplasm and associates with the polysomes. The NS1 binds to the 5'UTR of some viral mRNAs and stimulates translation. The NS2 is a phosphoprotein and binds to the nucleoporin yRip1 and Rab/hRip as well as the M1 protein which associates with the vRNPs. Therefore, the NS2 protein plays an important role in the nuclear export of the vRNPs. Improved technique to genetically manipulate influenza virus allowed us to rescue NS1 and NS2 mutants which are useful for further study.

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