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Related Concept Videos

Initiation of Translation02:33

Initiation of Translation

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...
Leaky Scanning02:28

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...
DNA-only Transposons02:57

DNA-only Transposons

DNA-only transposons are called autonomous transposons since they code for the enzyme transposase that is required for the transposition mechanism. Insertion of transposons can alter gene functions in multiple ways. They can mutate the gene, alter gene expression by introducing a novel promoter or insulator sequence, introduce new splice sites, and change the mRNA transcripts produced, or remodel chromatin structure.
The donor site from where the transposon is excised is either degraded or...
Human Virome01:26

Human Virome

The human body harbors a vast and diverse viral community known as the human virome. The virome includes bacteriophages that infect bacteria, and eukaryotic viruses that infect human cells. Transient dietary and environmental viruses also contribute to this dynamic ecosystem. Estimates suggest the human body may contain on the order of 10¹³ viral particles, though abundance varies widely by body site and detection method.Comprehensive characterization of the virome has become possible only with...
Rous Sarcoma Virus (RSV) and Cancer01:03

Rous Sarcoma Virus (RSV) and Cancer

Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand  RNA genome. Its genome consists of four main open...
Rous Sarcoma Virus (RSV) and Cancer01:03

Rous Sarcoma Virus (RSV) and Cancer

Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand  RNA genome. Its genome consists of four main open...

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Related Experiment Video

Updated: May 28, 2026

Use of Interferon-γ Enzyme-linked Immunospot Assay to Characterize Novel T-cell Epitopes of Human Papillomavirus
13:41

Use of Interferon-γ Enzyme-linked Immunospot Assay to Characterize Novel T-cell Epitopes of Human Papillomavirus

Published on: March 8, 2012

Codon usage roles in human papillomavirus.

Kong-Nan Zhao1, Jiezhong Chen

  • 1UQ Centre for Clinical Research, The University of Queensland, Brisbane, Queensland, Australia. k.zhao@uq.edu.au

Reviews in Medical Virology
|October 26, 2011
PubMed
Summary
This summary is machine-generated.

Human papillomavirus (HPV) genomes exhibit codon usage bias, impacting viral gene expression. Optimizing these codons enhances HPV DNA vaccine immunogenicity and therapeutic potential.

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RNAscope for In situ Detection of Transcriptionally Active Human Papillomavirus in Head and Neck Squamous Cell Carcinoma
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RNAscope for In situ Detection of Transcriptionally Active Human Papillomavirus in Head and Neck Squamous Cell Carcinoma

Published on: March 11, 2014

Related Experiment Videos

Last Updated: May 28, 2026

Use of Interferon-γ Enzyme-linked Immunospot Assay to Characterize Novel T-cell Epitopes of Human Papillomavirus
13:41

Use of Interferon-γ Enzyme-linked Immunospot Assay to Characterize Novel T-cell Epitopes of Human Papillomavirus

Published on: March 8, 2012

RNAscope for In situ Detection of Transcriptionally Active Human Papillomavirus in Head and Neck Squamous Cell Carcinoma
10:26

RNAscope for In situ Detection of Transcriptionally Active Human Papillomavirus in Head and Neck Squamous Cell Carcinoma

Published on: March 11, 2014

Area of Science:

  • Virology
  • Molecular Biology
  • Genomics

Background:

  • Human papillomavirus (HPV) genomes display distinct G+C content compared to hosts.
  • HPV exhibits significant codon usage bias, affecting viral gene expression in mammalian cells.

Purpose of the Study:

  • To investigate the role of codon usage bias in HPV gene expression.
  • To explore codon modification as a strategy to enhance HPV gene and oncogene expression.
  • To assess the potential of codon-optimized HPV DNA vaccines.

Main Methods:

  • Analysis of HPV genome codon usage patterns.
  • Investigating codon usage in relation to host cell tRNA availability (keratinocytes).
  • Evaluating codon optimization strategies in expression systems and animal models.

Main Results:

  • HPV genomes show bias towards specific codons, influencing translational efficiency.
  • Codon modification effectively overcomes translational blockages and weak protein expression.
  • Codon usage in HPV capsid genes aligns with keratinocyte tRNA, modulating expression.
  • Codon-optimized HPV DNA vaccines demonstrated enhanced immunogenicity in animal models.

Conclusions:

  • HPV codon usage bias is a key regulator of viral gene expression.
  • Codon optimization is a viable strategy for improving HPV gene and oncogene expression.
  • Codon-optimized HPV DNA vaccines represent a promising therapeutic approach.