Related Experiment Video
Updated: Jun 25, 2026

11:12
Transient Expression of Foreign Genes in Insect Cells (sf9) for Protein Functional Assay
Published on: February 22, 2018
Baculovirus genes affecting host function.
1Department of Entomology, Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI 48825, USA. smthiem@msu.edu
In Vitro Cellular & Developmental Biology. Animal
|February 28, 2009
Summary
Baculoviruses are insect-specific DNA viruses. Their auxiliary genes help overcome host defenses, aiding invasion and infection by traversing barriers and evading immunity.
Area of Science:
- Virology
- Insect Pathology
- Molecular Biology
Background:
- Baculoviruses are large, insect-specific DNA viruses.
- They possess auxiliary genes beyond those for replication.
- These genes confer advantages for host invasion and infection.
Purpose of the Study:
- To discuss eight baculovirus auxiliary genes.
- To highlight their roles in overcoming insect defenses against viral invasion.
Main Methods:
- Literature review and analysis of known baculovirus genes.
- Focus on genes involved in host interaction and immune evasion.
Main Results:
- Identified eight key baculovirus auxiliary genes.
- These genes facilitate overcoming physical, physiological, and immune barriers in insects.
- Products of these genes aid viral entry and spread within the host.
Conclusions:
- Baculovirus auxiliary genes are crucial for successful infection.
- These genes represent key adaptations for overcoming insect host defenses.
- Understanding these genes offers insights into viral pathogenesis and host-pathogen interactions.
Related Concept Videos
Leaky Scanning
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R stands for...
Regulation of Bacterial Virulence
Pathogenic bacteria employ a range of regulatory mechanisms to modulate the expression of virulence genes in response to environmental and host-derived signals. These mechanisms ensure that virulence factors are expressed only under favorable conditions, thereby optimizing infection and survival strategies.Mechanisms of Virulence RegulationKey regulatory strategies include:Two-Component Systems: These consist of a membrane-bound sensor kinase and a cytoplasmic response regulator. Environmental...
Inhibitors of Virion Maturation and Assembly
As part of their replication cycle, certain viruses synthesize long precursor proteins called polyproteins within infected host cells. In human immunodeficiency virus (HIV), two major polyproteins are produced: Gag and Gag-Pol. The Gag polyprotein supplies the structural components of the virus, while Gag-Pol includes essential viral enzymes such as reverse transcriptase, integrase, and protease. After synthesis, these polyproteins move to the host cell membrane, where they assemble into an...
Retroviruses
Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
Inhibitors Of Virion Release
Viral replication and dissemination rely on efficient mechanisms for host cell entry, genome replication, assembly, and release. Influenza viruses, such as types A and B, are negative-sense single-stranded RNA viruses with a segmented genome, that depend on two critical surface glycoproteins to carry out these processes: hemagglutinin (HA) and neuraminidase (NA). HA initiates infection by binding to sialic acid residues on the surface of host epithelial cells, facilitating receptor-mediated...
Size and Structure of Viral Genomes
Viral genomes exhibit remarkable diversity in size, structure, and composition, influencing their replication strategies and interactions with host cells. These genomes consist of either DNA or RNA and may be linear or circular. Additionally, they can be single-stranded or double-stranded, with each configuration affecting how the virus propagates within a host. RNA viruses, for instance, generally have smaller genomes than DNA viruses, a factor that contributes to their high mutation rates and...

