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Related Concept Videos

Viral Structure00:56

Viral Structure

Viruses are extraordinarily diverse in shape and size, but they all have several structural features in common. All viruses have a core that contains a DNA- or RNA-based genome. The core is surrounded by a protective coat of proteins called the capsid. The capsid is composed of subunits called capsomeres. The capsid and genome-containing core are together known as the nucleocapsid.
Size and Structure of Viral Genomes01:26

Size and Structure of Viral Genomes

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...
Viruses with RNA Genomes01:29

Viruses with RNA Genomes

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...
Influenza01:27

Influenza

Influenza is an acute, highly communicable viral disease that affects the respiratory tract and is responsible for seasonal epidemics worldwide. Influenza A is the most prevalent type associated with widespread outbreaks and is subtyped based on two surface glycoproteins: hemagglutinin (H) and neuraminidase (N), as in H1N1. These glycoproteins are essential for viral infectivity, transmission, and immune recognition. Transmission occurs primarily through respiratory droplets and contaminated...
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...
Introduction to Virus01:28

Introduction to Virus

Viruses are unique biological entities that blur the boundary between living and non-living systems. Although they lack cellular structure and metabolic processes, they can exhibit characteristics of life when infecting a host. Their defining feature is a nucleic acid core, composed of either DNA or RNA, encapsulated within a protein coat called a capsid. This simple structure allows them to invade host cells and use their machinery for replication efficiently.Viral Structure and...

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Bacterial Artificial Chromosomes: A Functional Genomics Tool for the Study of Positive-strand RNA Viruses
12:20

Bacterial Artificial Chromosomes: A Functional Genomics Tool for the Study of Positive-strand RNA Viruses

Published on: December 29, 2015

Flaviviruses and their antigenic structure.

F X Heinz1, Karin Stiasny

  • 1Department of Virology, Medical University of Vienna, Kinderspitalgasse 15, A-1095 Vienna, Austria. franz.x.heinz@meduniwien.ac.at

Journal of Clinical Virology : the Official Publication of the Pan American Society for Clinical Virology
|September 25, 2012
PubMed
Summary
This summary is machine-generated.

Flaviviruses like dengue pose global health threats. New structural insights into these viruses are crucial for developing effective vaccines and understanding immune responses.

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Area of Science:

  • Virology
  • Immunology
  • Vaccinology

Background:

  • Flaviviruses are significant arthropod-borne human pathogens, including yellow fever, dengue, and West Nile viruses.
  • Climate and ecological shifts facilitate flavivirus expansion.
  • Dengue vaccine development faces challenges due to potential immunopathological effects.

Purpose of the Study:

  • To explore the structural and antigenic properties of flaviviruses.
  • To understand the role of virus maturation and dynamics in antibody neutralization.
  • To inform the development of flavivirus vaccines and cell biology research.

Main Methods:

  • X-ray crystallography
  • Cryo-electron microscopy
  • Analysis of antibody responses to flavivirus infections and vaccinations

Main Results:

  • Detailed flavivirus particle structures reveal novel antigenic insights.
  • Virus maturation and particle dynamics significantly influence antibody neutralization.
  • Understanding these complexities enhances knowledge of flavivirus immune protection.

Conclusions:

  • Structural biology advancements offer new perspectives on flavivirus antigenicity.
  • Virus dynamics and maturation are key factors in immune evasion and neutralization.
  • This knowledge is vital for future flavivirus vaccine design and therapeutic strategies.