Expression of unspliced NS1 mRNA, spliced NS2 mRNA, and a spliced chimera mRNA from cloned influenza virus NS DNA in an SV40 vector

Robert A. Lamb*, Ching Juh Lai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


Influenza virus gene 8 codes for two nonstructural proteins (NS1 and NS2) which are translated, respectively, from a colinear and an interrupted mRNA. To investigate the mechanism of transcription processing by splicing, cloned full-length NS DNA was inserted into the late region of an SV40 vector. In this manner, transcription of NS RNA from the recombinant initiates and terminates using SV40 control sequences. RNA mapping and sequence analysis showed that the RNA transcripts are processed to produce both the spliced and unspliced NS mRNAs in approximately equal abundance. The junction sequence of the spliced mRNA is identical to that of NS2 mRNA found in influenza virus-infected cells. In addition, another mRNA species was found to contain a chimera splice between SV40 and NS sequences. Both NS1 and NS2 polypeptides are produced in the recombinant-infected cells as predicted from sequence analysis. These studies establish that during influenza virus infections processing of the NS, mRNA transcript undergoes a mechanism of splicing similar to that occurring with DNA-directed RNA transcription.

Original languageEnglish (US)
Pages (from-to)139-147
Number of pages9
Issue number1
StatePublished - May 1984

ASJC Scopus subject areas

  • Virology

Fingerprint Dive into the research topics of 'Expression of unspliced NS<sub>1</sub> mRNA, spliced NS<sub>2</sub> mRNA, and a spliced chimera mRNA from cloned influenza virus NS DNA in an SV40 vector'. Together they form a unique fingerprint.

Cite this