Replication of a human parvovirus nonsense mutant in mammalian cells containing an inducible amber suppressor.

Abstract:

:When recombinant plasmids containing the entire adeno-associated virus (AAV) genome are transfected into permissive cells infected with a helper adenovirus, infectious AAV particles are efficiently generated. These plasmids can be used to generate mutant AAV genomes or recombinant AAV vectors. Packaging of mutant AAV genomes has required complementation with a second AAV plasmid in the transfection assay which may lead to generation of significant amounts of wild-type AAV recombinants. One approach to alleviate this problem was to generate conditional lethal mutants. We constructed an AAV plasmid recombinant having a nonsense mutation in the AAV rep gene by using oligonucleotide-directed mutagenesis to convert a serine codon to an amber codon. We show that this mutant AAV can be grown on monkey cell lines containing an inducible human serine tRNA amber suppressor. The amber suppression is quite efficient and yields a burst of mutant AAV particles at about 10% of the titer of wild-type AAV. The reversion frequency of the amber mutation appears to be less than 10(-5).

journal_name

Virology

journal_title

Virology

authors

Chejanovsky N,Carter BJ

doi

10.1016/0042-6822(89)90531-x

subject

Has Abstract

pub_date

1989-07-01 00:00:00

pages

239-47

issue

1

eissn

0042-6822

issn

1096-0341

journal_volume

171

pub_type

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