TWI330198B

• Main Authors: LEE, DUNG FANG, JUANG, JYH LYH
• Format: Patent
• Language: Chinese
• Published: 11.09.2010
• Subjects: BEER; BIOCHEMISTRY; CHEMISTRY; COMPOSITIONS THEREOF; CULTURE MEDIA; ENZYMOLOGY; METALLURGY; MICROBIOLOGY; MICROORGANISMS OR ENZYMES; MUTATION OR GENETIC ENGINEERING; PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS; SPIRITS; VINEGAR; WINE

Compositions and methods are provided that relate to a recombinant virus-based vector, e.g., a baculovirus-based vector, that allows the expression of an exogenous target protein in non-permissive cells (e.g., non-permissive insect cells or mammalian cells) in the absence of expression of a detectable selection marker. The vector includes a nucleic acid sequence encoding a detectable selection marker which is controlled by a promoter that is active in host cells used to screen for recombinant virus but is silent in the non-permissive cell used for expression of the exogenous target protein. The vector also includes an exogenous nucleic acid sequence encoding a target protein under the control of a promoter that is active in the non-permissive cell. This system allows the selection marker to be expressed during viral plaque screening, but not while the target protein is being produced.