Search results
Results from the WOW.Com Content Network
The viral genome can be triggered to begin viral production via chemical and environmental stimulants. [14] Once a lysogenic virus enters the lytic life cycle, it will continue in the viral production pathways and proceed with transcription / mRNA production. (ex: Cold sores, herpes simplex virus (HSV)-1, lysogenic bacteriophages, etc.)
A reverse transcriptase (RT) is an enzyme used to convert RNA genome to DNA, a process termed reverse transcription.Reverse transcriptases are used by viruses such as HIV and hepatitis B to replicate their genomes, by retrotransposon mobile genetic elements to proliferate within the host genome, and by eukaryotic cells to extend the telomeres at the ends of their linear chromosomes.
Transcription of mRNAs initiated by viral polymerase using cap snatching. The first step of transcription for some negative, single-stranded RNA viruses is cap snatching, in which the first 10 to 20 residues of a host cell RNA are removed (snatched) and used as the 5′ cap and primer to initiate the synthesis of the nascent viral mRNA. [1]
U3 and U5 has been further subdivided according to transcription factor sites and their impact on LTR activity and viral gene expression. The multi-step process of reverse transcription results in the placement of two identical LTRs, each consisting of a U3, R, and U5 region, at either end of the proviral DNA.
An RNA virus is a virus characterized by a ribonucleic acid based genome. [1] The genome can be single-stranded RNA ( ssRNA ) or double-stranded (dsRNA). [ 2 ] Notable human diseases caused by RNA viruses include influenza , SARS , MERS , COVID-19 , Dengue virus , hepatitis C , hepatitis E , West Nile fever , Ebola virus disease , rabies ...
In virology, the term transcription is used when referring to mRNA synthesis from a viral RNA molecule. The genome of many RNA viruses [ a ] is composed of negative-sense RNA which acts as a template for positive sense viral messenger RNA - a necessary step in the synthesis of viral proteins needed for viral replication .
Transcription – the host cell's DNA is degraded and the cell's metabolism is directed to initiate phage biosynthesis; Biosynthesis – the phage DNA replicates inside the cell, synthesizing new phage DNA and proteins; Maturation – the replicated material assembles into fully formed viral phages (each made up of a head, a tail and tail fibers)
Double-stranded RNA viruses (dsRNA viruses) are a polyphyletic group of viruses that have double-stranded genomes made of ribonucleic acid.The double-stranded genome is used as a template by the viral RNA-dependent RNA polymerase (RdRp) to transcribe a positive-strand RNA functioning as messenger RNA (mRNA) for the host cell's ribosomes, which translate it into viral proteins.