HBV Mutation Detail Information

Virus Mutation HBV Mutation L21S


Basic Characteristics of Mutations
Mutation Site L21S
Mutation Site Sentence By measuring these viruses’ infectivity, we found that the mutation(s) affects the infectivity of isolate C-4 located in nucleotides 155 to 262 regions of the viral genome (Fig. 5B). Two mutations, sN3S and sL21S, in SHBs were identified (Fig. 5C).
Mutation Level Amino acid level
Mutation Type Nonsynonymous substitution
Gene/Protein/Region S
Standardized Encoding Gene S  
Genotype/Subtype B;C
Viral Reference -
Functional Impact and Mechanisms
Disease Hepatitis B, Chronic    
Immune Y
Target Gene -
Clinical and Epidemiological Correlations
Clinical Information Y
Treatment -
Location China
Literature Information
PMID 35314401
Title In vitro investigation of HBV clinical isolates from Chinese patients reveals that genotype C isolates possess higher infectivity than genotype B isolates
Author Liu T,Liu A,Liu Y,Cen S,Zhang Q
Journal Virologica Sinica
Journal Info 2022 Jun;37(3):398-407
Abstract Hepatitis B virus (HBV) genotype B and C are two major genotypes that are prevalent in Asia and differ in natural history and disease progression. The impact of HBV genotypes on viral replication and protein expression has been explored by the transfection of hepatoma cells with replication-competent HBV DNA, which mimics the later stages of the viral life cycle. However, the influence of HBV genotypes on the early events of viral infection remains undetermined, mainly due to the difficulties in obtaining sufficient infectious viral particles for infection assays. Here, we report that a high-titer HBV inoculum can be generated from the transient transfection-based cell model after optimizing transfection conditions and modifying the HBV-expressing construct. By performing in vitro infection assays using transiently transfected derived viruses, we found that clinical genotype C isolates possessed higher infectivity than genotype B isolates. Moreover, we identified a naturally occurring mutation sL21S in small hepatitis B surface protein, which markedly decreased the infectivity of HBV genotype C isolates, but not that of genotype B isolates. In summary, using infectious viral particles provided by the optimized transient transfection-based cell model, we have been able to investigate a wide range of HBV variants on viral infectivity, which may contribute to our understanding of the reasons for different clinical outcomes in HBV infections and the development of therapeutic drugs targeting the early stages of HBV life cycle.
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.