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Related Concept Videos

Hepatitis01:25

Hepatitis

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Hepatitis is an inflammatory condition of the liver most commonly caused by hepatotropic viruses (A–E), though non-infectious causes such as alcohol and drugs also exist.Hepatitis AHepatitis A virus (HAV) is a non-enveloped RNA virus of the Picornaviridae family. It is primarily transmitted via the fecal-oral route, typically through ingestion of contaminated food or water. After ingestion, HAV enters the bloodstream through the oropharynx or intestinal epithelium and reaches the liver.
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Viral Hepatitis I: Introduction01:28

Viral Hepatitis I: Introduction

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Viral hepatitis is an inflammatory condition of the liver caused by infection with hepatotropic viruses, most commonly hepatitis A, B, C, D, and E. Despite variations in structure and transmission, all viruses mentioned infect hepatocytes and provoke immune responses that can hinder liver function. Additionally, some non-hepatotropic viruses can also lead to hepatic inflammation.Hepatitis A VirusHepatitis A virus (HAV) is transmitted through the fecal–oral route, typically by ingestion...
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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...
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Viral Structure00:56

Viral Structure

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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.
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Size and Structure of Viral Genomes01:26

Size and Structure of Viral Genomes

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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...
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Nucleic Acid Structure01:25

Nucleic Acid Structure

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The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms  a 5′ to 3′ phosphodiester linkage.
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A Protocol for Analyzing Hepatitis C Virus Replication
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Unraveling hepatitis C virus structure.

Catherine Fauvelle1, Daniel J Felmlee1, Thomas F Baumert2

  • 11] Inserm Unit 1110, Université de Strasbourg, 3 rue Koeberlé, F-67000 Strasbourg, France [2] Pôle Hépato-digestif, Université de Strasbourg, Strasbourg, France.

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Hepatitis C virus (HCV) envelope glycoproteins present vaccine design challenges. A new globular E2 glycoprotein structure model contrasts with previous models, offering new insights for HCV vaccine development.

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Area of Science:

  • Virology
  • Structural Biology
  • Vaccinology

Background:

  • The hepatitis C virus (HCV) envelope glycoproteins (GP) exhibit high variability.
  • Limited knowledge of HCV GP structure impedes effective vaccine design.

Purpose of the Study:

  • To present a novel structural model of the HCV E2 glycoprotein.
  • To compare the new E2 GP structure with existing models of viral fusion proteins.

Main Methods:

  • Analysis of structural data for the HCV E2 glycoprotein.

Main Results:

  • A new globular structural model for HCV E2 GP was proposed.
  • The determined E2 GP structure significantly differs from the extended model of class II fusion proteins found in other Flaviviridae viruses.

Conclusions:

  • The novel globular structure of HCV E2 GP provides critical insights for vaccine development.
  • Understanding the E2 GP structure is essential for overcoming hurdles in designing effective HCV vaccines.