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Related Experiment Videos

A baculovirus vector can express intron-containing genes.

K T Jeang, M Holmgren-Konig, G Khoury

    Journal of Virology
    |May 1, 1987
    PubMed
    Summary
    This summary is machine-generated.

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    Simian virus 40 (SV40) genes for large T and small t antigens were inserted into a baculovirus. Recombinant virus produced small t antigen but little large T protein in insect cells, indicating correct splicing.

    Area of Science:

    • Molecular Biology
    • Virology
    • Insect Cell Culture

    Background:

    • The Simian virus 40 (SV40) genome encodes essential proteins, including large T and small t antigens, crucial for viral replication and cellular transformation.
    • Baculoviruses, such as Autographa californica nuclear polyhedrosis virus (AcMNPV), are widely used as expression vectors in eukaryotic insect cells due to their high expression levels.

    Purpose of the Study:

    • To investigate the expression of SV40 large T and small t antigens using a baculovirus expression system.
    • To analyze the utilization of SV40 splicing signals within the context of insect cells.
    • To determine the efficiency of producing SV40 antigens in Spodoptera frugiperda (SF9) cells.

    Main Methods:

    • Construction of a recombinant baculovirus containing an SV40 genomic fragment encoding large T and small t antigens.

    Related Experiment Videos

  • Infection of Spodoptera frugiperda (SF9) insect cells with the recombinant baculovirus.
  • Analysis of protein expression using Western blotting (implied) and molecular techniques like Northern blotting and S1 nuclease digestion to confirm RNA processing.

    • Main Results:

    • Significant production of SV40 small t antigen was observed in infected SF9 cells.
    • Minimal to no large T protein was detected, suggesting differential expression or stability.
    • Northern blotting and S1 nuclease digestion confirmed the correct and preferential use of small t splicing signals.

    Conclusions:

    • The baculovirus expression system can be used to produce SV40 small t antigen in insect cells.
    • The study demonstrates the functional utilization of SV40 splicing signals in a heterologous insect cell environment.
    • Differential expression of SV40 T antigens in this system highlights the importance of specific regulatory elements.