Document Detail

Vesicular stomatitis virus mRNA and inhibition of translation of cellular mRNA--is there a P function in vesicular stomatitis virus?
MedLine Citation:
PMID:  6264124     Owner:  NLM     Status:  MEDLINE    
Infection of animal cells by vesicular stomatitis virus (VSV) results in inhibition of translation of cellular mRNA. We showed previously that, in BHK cells infected by the Glasgow isolate of VSV Indiana, this is due to competition during the initiation step of protein synthesis of viral and cellular mRNA for a constant, limiting number of ribosomes. We show here that infection of the same cells with the San Juan isolate of VSV resulted in a more rapid shutoff of host protein synthesis and that this was paralleled by a more rapid accumulation of viral mRNA. Extending our conclusion that shutoff is due to mRNA competition, we show further that the average size of polysomes translating viral and cellular mRNA was threefold smaller in cells infected by VSV San Juan than by VSV Glasgow, which, in turn, was about one-half that of uninfected cells. In all cases, cellular and viral mRNA's which encoded the same-sized polypeptides were found on the same-sized polysomes, a result indicating that the efficiency of translation of both types of mRNA's is about the same in the infected cell. Also, there was no preferential sequestration of viral or cellular mRNA's in ribonucleoprotein particles. Additional correlations between the levels of viral mRNA's and the inhibition of protein synthesis came from studies of three other wild-type VSV strains and also from studies with Vero and L cells. In particular, the rate of shutoff of L-cell protein synthesis after infection by any VSV isolate was slower than that in BHK cells, and this was correlated with a slower rate of accumulation of viral mRNA. VSV temperature-sensitive mutants which synthesized, at the nonper-missive temperature, no VSV mRNA failed to inhibit synthesis of cellular proteins. Stanners and co-workers (C. P. Stanners, A. M. Francoeur, and T. Lam, Cell 11:273-281, 1977) claimed that VSV mutant R1 inhibited synthesis of L cell protein synthesis less rapidly than did its parent wild-type strain HR. They concluded that this effect was due to a mutation in an unspecified VSV protein, "P." We found, in both L and BHK cells, that R1 infection resulted in a slightly slower inhibition of cellular mRNA translation than did HR infection and that this was correlated with a slightly reduced accumulation of VSV mRNA. The level of VSV mRNA, rather than any specific VSV protein, appeared to be the key factor in determining the rate of shutoff of host protein synthesis.
H F Lodish; M Porter
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of virology     Volume:  38     ISSN:  0022-538X     ISO Abbreviation:  J. Virol.     Publication Date:  1981 May 
Date Detail:
Created Date:  1981-08-10     Completed Date:  1981-08-10     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  0113724     Medline TA:  J Virol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  504-17     Citation Subset:  IM    
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MeSH Terms
Cell Line
Cercopithecus aethiops
L Cells (Cell Line)
Polyribosomes / metabolism
Protein Biosynthesis*
RNA, Messenger / metabolism*
RNA, Viral / metabolism*
Vesicular stomatitis Indiana virus / metabolism*
Viral Proteins / biosynthesis
Grant Support
Reg. No./Substance:
0/RNA, Messenger; 0/RNA, Viral; 0/Viral Proteins

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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