INSECT-DERIVED PROMOTERS FOR FOREIGN PROTEINS EXPRESSION IN INSECT CELLS

• Main Authors: MARTINEZ ESCRIBANO JOSE ANGEL, SANCHEZ RAMOS ISMAEL, LOPEZ VIDAL JAVIER, GOMEZ SEBASTIAN SILVIA, ALONSO MARTI COVADONGA
• Format: Patent
• Language: English
• Published: 18.08.2011
• Subjects: AGRICULTURE; ANIMAL HUSBANDRY; BEER; BIOCHEMISTRY; CARE OF BIRDS, FISHES, INSECTS; CHEMISTRY; COMPOSITIONS OR TEST PAPERS THEREFOR; COMPOSITIONS THEREOF; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL ORENZYMOLOGICAL PROCESSES; CULTURE MEDIA; DERIVATIVES THEREOF; ENZYMOLOGY; FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE; FISHING; FORESTRY; HUMAN NECESSITIES; HUNTING; MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEICACIDS OR MICROORGANISMS; METALLURGY; MICROBIOLOGY; MICROORGANISMS OR ENZYMES; MUTATION OR GENETIC ENGINEERING; NEW BREEDS OF ANIMALS; NUCLEIC ACIDS; NUCLEOSIDES; NUCLEOTIDES; ORGANIC CHEMISTRY; PROCESSES OF PREPARING SUCH COMPOSITIONS; PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; SPIRITS; SUGARS; TRAPPING; VINEGAR; WINE

Insect-derived promoters for foreign proteins expression in insect cells. Regulatory polynucleotide sequences which drive the expression of major insect proteins (hexamerins) at specific evolution stages of larva have been isolated from insects (Trichoplusia ni) in the present invention. Said regulatory polynucleotide sequences promote stronger foreign gene expression in the baculovirus system than the conventional polyhedrin promoter. Additionally, the combination of the new larva-derived promoters of the invention with the pL promoter increased baculovirus expression levels up to 61%-375% (depending on the time of infection) with respect to conventional baculoviruses used in the biotechnology industry. Promoter pB2 also drives gene expression at earlier times than polyhedrin promoter, being this feature a great advantage for correct protein folding and posttranslational modification.