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J Virol. 2002 Dec;76(24):13111-5.

Retrovirus-specific packaging of aminoacyl-tRNA synthetases with cognate primer tRNAs.

Author information

1
Lady Davis Institute for Medical Research and McGill AIDS Center, Jewish General Hospital, McGill University, 3755 Cote Ste-Catherine Road, Montreal, Quebec, Canada H3T 1E2.

Abstract

The tRNAs used to prime reverse transcription in human immunodeficiency virus type 1 (HIV-1), Rous sarcoma virus (RSV), and Moloney murine leukemia virus (Mo-MuLV) are, tRNA(Trp), and tRNA(Pro), respectively. Using antibodies to the three cognate human aminoacyl-tRNA synthetases, we found that only lysyl-tRNA synthetase (LysRS) is present in HIV-1, only tryptophanyl-tRNA synthetase (TrpRS) is present in RSV, and neither these two synthetases nor prolyl-tRNA synthetase (ProRS) is present in Mo-MuLV. LysRS and TrpRS are present in HIV-1 and RSV at approximately 25 and 12 molecules/virion, respectively. These results support the hypothesis that, in HIV-1 and RSV, the cognate aminoacyl-tRNA synthetase may be used as the signal for targeting the selective packaging of primer tRNAs into retroviruses. The absence of ProRS in Mo-MuLV is consistent with reports that selective packaging of tRNA(Pro) in this virus is less important for achieving optimum annealing of the primer to Mo-MuLV genomic RNA.

PMID:
12438642
PMCID:
PMC136713
DOI:
10.1128/jvi.76.24.13111-13115.2002
[Indexed for MEDLINE]
Free PMC Article

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