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Basic Characteristics of Mutations
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Mutation Site
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A1727G |
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Mutation Site Sentence
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It was found that the case Pkst8216 (sub-genotype D1) had point mutations A1727G, T1653C and A1757G in addition to the BCP double mutation T1762/A1764 and PC stop codon mutation A1897. |
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Mutation Level
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Nucleotide level |
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Mutation Type
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Synonymous substitution |
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Gene/Protein/Region
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BCP;PreC |
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Standardized Encoding Gene
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C
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Genotype/Subtype
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D1 |
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Viral Reference
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AB583681;AB583680;AB583679
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Functional Impact and Mechanisms
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Disease
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Hepatitis B, Chronic
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Immune
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- |
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Target Gene
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-
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Clinical and Epidemiological Correlations
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Clinical Information
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Y |
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Treatment
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- |
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Location
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Pakistan |
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Literature Information
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PMID
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22087110
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Title
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A study of genotypes, mutants and nucleotide sequence of hepatitis B virus in Pakistan: HBV genotypes in pakistan
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Author
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Mumtaz K,Hamid S,Ahmed S,Moatter T,Mushtaq S,Khan A,Mizokami M,Jafri W
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Journal
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Hepatitis monthly
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Journal Info
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2011 Jan;11(1):14-8
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Abstract
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BACKGROUND: Hepatitis B virus (HBV) genotypes and mutations are gaining importance in determining the clinical course of chronic liver disease. OBJECTIVES: To determine and compare the distribution of HBV genotypes and genomic variations in Pakistan to other parts of the world. PATIENTS AND METHODS: We conducted a prospective study at Aga Khan University Hospital from December 2006 to December 2008. HBV genotype was determined in 257 HBV DNA-positive patients. Patients were divided into two groups according to HBeAg positivity. Mutations in the pre-core and core promoter regions of HBV were determined in HBeAg-negative patients by line probe INNOLIPA assay. RESULTS: The mean+/-SD age of patients was 28+/-5 years; there were 201 (78%) men. HBeAg was positive in 219 (85%) patients and negative in 38 (15%). HBeAg-positive patients were younger than HBeAg-negative patients (95% vs 21% in =30 years, p<0.001). HBV genotype D found in 247 (96.2 %) patients followed by a combined infection with HBV genotype B+D in 9 (3.3%) and 1 (0.5%) with genotype A. The mutations identified in 38 HBeAg-negative patients were T1762/A1764 in 21 (55.2%), PC mutant in 7 (18.4%), T1762/A1764/PC mutant in 2 (5%) and T1762/A1764/PC wild mutation in 1 (2%); no mutation identified in 7 (18.4%). Phylogenetic analysis did not show any significant differences between HBV genotype D isolated from Pakistan and those isolated from other parts of the world. CONCLUSIONS: HBV genotype D is predominant in Pakistan, irrespective of HBeAg status. PC and BCP mutations were found in significant numbers of patients infected with genotype D. The HBV genotype D isolates from Pakistan are identical to the sequences isolated from other parts of the world.
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Sequence Data
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-
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