Recombinant poxvirus host range selection system
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United States of America Patent
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Oct 13, 1992
Grant Date -
N/A
app pub date -
Mar 8, 1989
filing date -
Mar 8, 1989
priority date (Note) -
Expired
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Abstract
What is described is a selection system for the cloning and expression of open reading frames in poxviruses, particularly vaccinia virus. The selection system is based on a conditional lethal mutant (host range) of poxviruses. A deletion/recombinant mutant of the vaccinia virus was generated which is capable of plaquing on primary chick embryo fibroblasts and two monkey cell lines (BSC-40 or VERO) but is defective in replication in the human cell line MRC-5. Insertion of the host range gene into the deletion/recombinant restores the ability for growth on MCR-5 cells. A series of plasmids were constructed which allow for the rapid single-step cloning and expression of any open reading frame when recombined with the deletion/recombinant and scored for growth on MCR-5 cells.
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