HEV Mutation Detail Information

Virus Mutation HEV Mutation P76L


Basic Characteristics of Mutations
Mutation Site P76L
Mutation Site Sentence Among the most prevalent AA mutations, the P76L substitution (ORF2) identified in P4 leads to a decrease of the predicted antigenicity (-38%, AA74; Data S5) while the corresponding L89F has no impact regarding ORF3 antigenicity.
Mutation Level Amino acid level
Mutation Type Nonsynonymous substitution
Gene/Protein/Region ORF2
Standardized Encoding Gene ORF2
Genotype/Subtype Genotype 3
Viral Reference AB369687
Functional Impact and Mechanisms
Disease HEV Infection    
Immune Y
Target Gene -
Clinical and Epidemiological Correlations
Clinical Information Y
Treatment -
Location France
Literature Information
PMID 33877740
Title Variability in molecular characteristics of Hepatitis E virus quasispecies could modify viral surface properties and transmission
Author Hartard C,Fenaux H,Gentilhomme A,Murray JM,Akand E,Laugel E,Berger S,Maul A,de Rougemont A,Jeulin H,Remen T,Bensenane M,Bronowicki JP,Gantzer C,Bertrand I,Schvoerer E
Journal Journal of viral hepatitis
Journal Info 2021 Jul;28(7):1078-1090
Abstract Hepatitis E virus (HEV) usually causes self-limited liver diseases but can also result in severe cases. Genotypes 1 (G1) and 2 circulate in developing countries are human-restricted and waterborne, while zoonotic G3 and G4 circulating in industrialized countries preferentially infect human through consumption of contaminated meat. Our aims were to identify amino acid patterns in HEV variants that could be involved in pathogenicity or in transmission modes, related to their impact on antigenicity and viral surface hydrophobicity. HEV sequences from human (n = 37) and environmental origins (wild boar [n = 3], pig slaughterhouse effluent [n = 6] and urban wastewater [n = 2]) were collected for the characterization of quasispecies using ultra-deep sequencing (ORF2/ORF3 overlap). Predictive and functional assays were carried out to investigate viral particle antigenicity and hydrophobicity. Most quasispecies showed a major variant while a mixture was observed in urban wastewater and in one chronically infected patient. Amino acid signatures were identified, as a rabbit-linked HEV pattern in two infected patients, or the S68L (ORF2) / H81C (ORF3) residue mostly identified in wild boars. By comparison with environmental strains, molecular patterns less likely represented in humans were identified. Patterns impacting viral hydrophobicity and/or antigenicity were also observed, and the higher hydrophobicity of HEV naked particles compared with the enveloped forms was demonstrated. HEV variants isolated from human and environment present molecular patterns that could impact their surface properties as well as their transmission. These molecular patterns may concern only one minor variant of a quasispecies and could emerge under selective pressure.
Sequence Data -
Mutation Information
Note
Basic Characteristics of Mutations
  • Mutation Site: The specific location in a gene or protein sequence where a change occurs.
  • Mutation Level: The level at which a mutation occurs, including the nucleotide or amino acid level.
  • Mutation Type: The nature of the mutation, such as missense mutation, nonsense mutation, synonymous mutation, etc.
  • Gene/Protein/Region: Refers to the specific region of the virus where the mutation occurs. Including viral genes, viral proteins, or a specific viral genome region. If the article does not specifically indicate the relationship between the mutation and its correspondence, the main
  • Gene/Protein/Region studied in the article is marked.
  • Genotype/Subtype: Refers to the viral genotype or subtype where the mutation occurs. If the article does not specifically indicate the relationship between the mutation and its correspondence, the main Genotype/Subtype studied in the article is marked.
  • Viral Reference: Refers to the standard virus strain used to compare and analyze viral sequences.
Functional Impact and Mechanisms
  • Disease: An abnormal physiological state with specific symptoms and signs caused by viral infection.
  • Immune: The article focuses on the study of mutations and immune.
  • Target Gene: Host genes that viral mutations may affect.
Clinical and Epidemiological Correlations
  • Clinical Information: The study is a clinical or epidemiological study and provides basic information about the population.
  • Treatment: The study mentioned a certain treatment method, such as drug resistance caused by mutations. If the study does not specifically indicate the relationship between mutations and their correspondence treatment, the main treatment studied in the article is marked.
  • Location: The source of the research data.
Literature Information
  • Sequence Data: The study provides the data accession number.