Related Experiment Video
Updated: Apr 6, 2026
09:08
Generation and Assembly of Virus-Specific Nucleocapsids of the Respiratory Syncytial Virus
Published on: July 27, 2021
4.2K
Alphavirus RNA synthesis and non-structural protein functions.
Jonathan C Rupp1, Kevin J Sokoloski1, Natasha N Gebhart1
1Department of Biology, Indiana University, 212 South Hawthorne Drive, Bloomington, IN 47405, USA.
The Journal of General Virology
|July 30, 2015
Summary
Alphaviruses are mosquito-borne viruses causing severe human diseases like encephalitis. This review details alphavirus RNA synthesis, a key target for developing new antiviral drugs against these emerging threats.
Area of Science:
- Virology
- Molecular Biology
- Public Health
Background:
- Alphaviruses are positive-sense RNA viruses transmitted by mosquitoes.
- Alphavirus infections can cause severe debilitating diseases, including encephalitis and death.
- Emerging alphaviruses like chikungunya pose significant public health concerns globally.
Purpose of the Study:
- To review the current understanding of alphavirus RNA synthesis regulation.
- To elucidate the roles of viral non-structural proteins in RNA synthesis.
- To describe the functions of cis-acting RNA elements in alphavirus replication.
Main Methods:
- Literature review of existing research on alphavirus RNA synthesis.
- Analysis of viral non-structural proteins involved in replication.
- Examination of cis-acting RNA elements critical for viral RNA synthesis.
Main Results:
- Detailed description of the regulatory mechanisms governing alphavirus RNA synthesis.
- Identification of key viral non-structural proteins and their functions in replication.
- Explanation of the essential roles of cis-acting RNA elements in the viral life cycle.
Conclusions:
- Alphavirus RNA synthesis is a complex process involving specific viral proteins and RNA elements.
- Understanding these mechanisms is crucial for developing effective antiviral therapies.
- Further research is needed to address open questions in alphavirus replication and pathogenesis.
Related Concept Videos
01:29Viruses with RNA Genomes
1.4K
RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
1.4K
02:28Leaky Scanning
5.9K
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...
5.9K
01:29Viruses of Archaea
657
Archaeal viruses play a crucial role in the ecosystems of extremophilic archaea, particularly those belonging to the phyla Euryarchaeota and Crenarchaeota. By shaping host evolution and facilitating gene transfer, these viruses influence microbial communities and contribute to genetic diversity in extreme environments. The archaea they infect thrive in acidic hot springs and hydrothermal vents characterized by high temperatures and low pH. Archaeal viruses exhibit remarkable structural...
657
01:26Size and Structure of Viral Genomes
1.1K
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...
1.1K
01:10Retrovirus Life Cycles
50.6K
Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the...
50.6K
01:30Inhibitors of Viral Protein Synthesis
32
Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
32