Related Experiment Video
Updated: Aug 28, 2025

09:14
Isolation and Quantification of Epstein-Barr Virus from the P3HR1 Cell Line
Published on: September 28, 2022
4.0K
Pseudouridylation of Epstein-Barr virus noncoding RNA EBER2 facilitates lytic replication
Belle A Henry1, Virginie Marchand2, Brent T Schlegel1
1Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15219, USA.
Summary
Epstein-Barr virus EBER2 RNA is pseudouridylated by Dyskerin, enhancing its stability and viral replication. This RNA modification is crucial for efficient Epstein-Barr virus lytic replication.
Area of Science:
- Molecular Biology
- Virology
- Epitranscriptomics
Background:
- Epstein-Barr virus (EBV) encodes essential noncoding RNAs, EBER1 and EBER2.
- RNA modifications are critical for noncoding RNA function.
Purpose of the Study:
- Investigate RNA modifications in EBV-encoded RNA 2 (EBER2).
- Determine the functional significance of EBER2 modification in viral replication.
Main Methods:
- HydraPsiSeq for mapping pseudouridylation sites.
- Identification of the pseudouridylating enzyme and guide RNA.
- Analysis of EBER2 RNA levels and viral genome accumulation.
Main Results:
- EBER2 is pseudouridylated at a single site in its 3' region.
- Dyskerin, guided by SNORA22, catalyzes EBER2 pseudouridylation.
- Loss of EBER2 pseudouridylation decreases RNA stability and impairs viral genome replication.
Conclusions:
- Pseudouridylation of EBER2 is essential for viral stability and efficient lytic replication.
- This modification highlights the role of epitranscriptomics in viral life cycles.
More Related Videos
Related Concept Videos
Viruses with RNA Genomes
94
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...
94
Leaky Scanning
5.2K
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...
5.2K
Eukaryotic RNA Polymerases
24.5K
RNA Polymerase (RNAP) is conserved in all animals, with bacterial, archaeal, and eukaryotic RNAPs sharing significant sequence, structural, and functional similarities. Among the three eukaryotic RNAPs, RNA Polymerase II is most similar to bacterial RNAP in terms of both structural organization and folding topologies of the enzyme subunits. However, these similarities are not reflected in their mechanism of action.
All three eukaryotic RNAPs require specific transcription factors, of which the...
All three eukaryotic RNAPs require specific transcription factors, of which the...
24.5K
RNA Editing
9.1K
RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...
9.1K
Initiation of Translation
34.4K
Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs.
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
First, the initiator tRNA must be selected from the pool of elongator tRNAs by eukaryotic initiation factor 2 (eIF2). The initiator tRNA (Met-tRNAi) has conserved sequence elements including modified bases at...
34.4K
Transcription Initiation
16.6K
Initiation is the first step of transcription in eukaryotes. Prokaryotic RNA Polymerase (RNAP) can bind to the template DNA and start transcribing. On the other hand, transcription in eukaryotes requires additional proteins, called transcription factors, to first bind to the promoter region in the DNA template. This binding helps recruit the specific RNAP that can assemble on the DNA and start transcription.
The promoters and enhancers and their accessory proteins allow tight regulation of...
The promoters and enhancers and their accessory proteins allow tight regulation of...
16.6K

