An Autographa californica nucleopolyhedrovirus lef-2 mutant: consequences for DNA replication and very late gene expression

Virology
C L MerringtonR D Possee

Abstract

In order to define factors involved in very late Autographa californica nucleopolyhedrovirus (AcMNPV) gene function, random mutagenesis of a baculovirus recombinant (AcUW1.lacZ) by 5'-bromodeoxyuridine treatment was performed. Five viruses were selected with deficiencies in very late gene expression. These were characterized by complementation analysis. One mutant virus, VLD1, was found to be completely deficient in very late gene function. This virus could be complemented by a helper virus to express the very late genes, suggesting that the mutant virus was defective in an activator of very late gene expression. Further studies revealed that the replication of VLD1 was temporally delayed when compared to wild-type virus. The mutation in VLD1 was mapped to a subfragment of the EcoRI-I region of the AcMNPV genome between 0 and 5 map units. Sequence analysis revealed the presence of point mutations in ORF2 and in lef-2. Further mapping experiments demonstrated that only replacement of the point mutation in lef-2 with a wild-type sequence could restore VLD1 to a normal phenotype. Previous studies have suggested that the lef-2 gene product is involved in DNA replication. This was investigated by comparison of DNA replication in wil...Continue Reading

Citations

Jul 21, 2004·Journal of Molecular Microbiology and Biotechnology·Kathleen L Hefferon

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.