Journal
JOURNAL OF VIROLOGY
Volume 80, Issue 6, Pages 3108-3111Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/JVI.80.6.3108-3111.2006
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Funding
- Wellcome Trust [067575] Funding Source: Medline
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We have sequenced the nonstructural protein coding region of Semliki Forest virus temperature-sensitive (ts) mutant strains ts1, ts6, ts9, ts10, ts11, ts13, and ts14. In each case, the individual amino acid changes uncovered were transferred to the prototype strain background and thereby identified as the underlying cause of the altered RNA synthesis phenotype. All mutations mapping to the protease domain of nonstructural protein nsP2 caused defects in nonstructural polyprotein processing and subgenomic RNA synthesis, and all mutations in the helicase domain of nsP2 affected subgenomic RNA production. These types of defects were not associated with mutations in other nonstructural proteins.
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