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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Infection of neuroblastoma cells by Semliki Forest virus. The interference of viral capsid protein with the binding of host messenger RNAs into initiation complexes is the cause of the shut-off of host protein synthesis.

From ribosomal washes of neuroblastoma cells infected with Semliki Forest virus (SFV) a protein of Mr 33000 was purified, which comigrated with the viral capsid protein on sodium dodecyl sulfate/polyacrylamide gels and was recognized by antibodies against the capsid protein of SFV. This protein selectively inhibits the translation of host and early viral 42S mRNA in vitro, but has no effect on late viral 26S and encephalomyocarditis virus mRNA translation. Eukaryotic initiation factor 4B and cap-binding protein restore the translation of host and 42S mRNA to control levels. The capsid protein specifically prevents the binding of host mRNA into 80S initiation complexes, but has no effect on that of late viral mRNA. We propose that the capsid protein is the component responsible for the shut-off of host protein synthesis in SFV-infected cells and for the decreased translational activity of the crude ribosomal washes from these cells.[1]

References

  1. Infection of neuroblastoma cells by Semliki Forest virus. The interference of viral capsid protein with the binding of host messenger RNAs into initiation complexes is the cause of the shut-off of host protein synthesis. van Steeg, H., Kasperaitis, M., Voorma, H.O., Benne, R. Eur. J. Biochem. (1984) [Pubmed]
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