HBV Mutation Detail Information

Virus Mutation HBV Mutation 94delH


Basic Characteristics of Mutations
Mutation Site 94delH
Mutation Site Sentence Table 2, Table 3, Table 4
Mutation Level Amino acid level
Mutation Type Deletion
Gene/Protein/Region EnhII
Standardized Encoding Gene
Genotype/Subtype D
Viral Reference EU174320(Australia);AY934408(Russia);KT151610(India);AB486530(Japan);AF121239(Sweden);EU594415(Russia);AB194951(Cameroon);FJ692561(Haiti);AY934773(Tanzania);AY233287(SouthAfrica);AY233274(SouthAfrica);AF297625(SouthAfrica);AY934771(Somalia);EU366129(Argentina);DQ060822(Argentina);EU598595(Belgium);GQ161837(Guinea);AP007264(Japan);EU498282(Thailand)
Functional Impact and Mechanisms
Disease Hepatitis B Virus Infection    
Immune -
Target Gene -
Clinical and Epidemiological Correlations
Clinical Information Y
Treatment -
Location Pakistan
Literature Information
PMID 34982798
Title Genetic diversity in enhancer II region of HBV genotype D and its association with advanced liver diseases
Author Khan M,Khan S,Gondal MF,Bibi S,Khan BT,Majid A,Khattak A,Khabir MN,Anwar M,Gul A,Naseem M,Attaullah S
Journal PloS one
Journal Info 2022 Jan 4;17(1):e0261721
Abstract BACKGROUND: Hepatitis B Virus (HBV) is one of the most common human infectious agents, and the mutations in its genome may cause chronic hepatitis (CH), liver cirrhosis (LC), and hepatocellular carcinoma (HCC). This study was designed to characterize the enhancer-II (Enh-II) region of X gene in HBV positive patients to assess the association of such mutations with CH, LC, and HCC. METHODS: HBV positive samples (N = 200) with patients' demographic and clinical data were collected from different regions of Khyber Pakhtunkhwa (KP), Pakistan. The Enh-II region of the HBx gene was sequenced and zanalyzed for polymorphism associated with advanced liver disease. Univariate and logistic regression analyses were performed to evaluate potent mutations associated with a risk for LC and HCC. RESULTS: HBV Enh-II region sequences analysis revealed 25 different mutations. The highest frequency of mutations S101F (62.2%), A102V/R/G/I (56.25%), M103L/A (68.75%)were found in HCC, followed in LC and CH patients as 57.1%, 42.8%, 28.52% 16%, 15.2% and 18.4% respectively. H94 deletion in the alpha-box of the Enh-II region, associated with a high risk of HCC was found in half of the HCC patients. This deletion was present in 28.5% of LC and 6.5% of CH patients. Importantly, the high frequency of some notable mutations such as E109A/Y, A110S/K, Y111D/E, and F112L was first time reported in the entire study population. The frequencies of these mutations were high in HCC (43.75%, 37.5%, 50% and 43.75% respectively) as compared to LC (14.28%, 14.28%, 28.2% and 42.8%) and CH patients (12.8%, 15.2%, 16.8% and 16% respectively). CONCLUSION: Mutations associated with LC and HCC are prevalent in the Enh-II region in Pakistani HBV isolates. The mutations found are alarming in CH patients as these may progress to LC and HCC in a large number of patients.
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.