Abstract: Variants in the precore (G(1896)A) and core promoter (A(1762)T, G(1764)A) regions of hepatitis B virus (HBV) may be related to serum HBV DNA levels and severity of liver disease.
Evolution of hepatitis B virus sequence from a liver transplant recipient with rapid breakthrough despite hepatitis B immune globulin prophylaxis and lamivudine therapy.
Abstract: Sequence analysis of full-length viral genome before transplantation revealed many point mutations as compared with a wild-type genotype C sequence, including the T1753G/A1762T/G1764A triple mutation in the basal core promoter and the G1896A nonsense mutation in the precore region.
An outbreak of fulminant hepatitis B in immunocompromised hemodialysis patients.
Abstract: RESULTS: All five patients had hepatitis B surface antigen (HBsAg) genotype C, a G-to-A stop codon mutation at nucleotide (nt) 1896 in the precore region, an A-to-T mutation at nt 1762 and an G-to-A mutation at nt 1764 in the basal core promoter.
Abstract: The mutation for a stop codon in the precore region (G1896A) for aborting the translation of hepatitis B e antigen (HBeAg) is prohibited in HBV genomes of genotype A, as well as some of genotypes C and F, because they possess C at position 1858 that makes a Watson-Crick pair with G at position 1896.
Hepatitis B genotypes and precore/basal core promoter mutants in HBeAg-negative chronic hepatitis B.
Abstract: BACKGROUND: Mutations in the precore stop codon (G1896A) and the basal core promoter (A1762T and G1764A) are frequently found in hepatitis B envelope antigen (HBeAg)-negative chronic hepatitis B.
Sequential analysis of hepatitis B virus core promoter and precore regions in cancer survivor patients with chronic hepatitis B before, during and after interferon treatment.
Abstract: Precore mRNA synthesis was suppressed by the A1762T/G1764A mutation regardless of the presence of the precore stop codon mutation G1896A, suggesting that in addition to downregulating an immunomodulatory protein this double basic core promoter mutation may also confer a replication advantage to the virus.
Clinical features and viral sequences of various genotypes of hepatitis B virus compared among patients with acute hepatitis B.
Abstract: Precore mutations, mainly M1 (G1896A, stop at codon 28) were similarly found among viral genotypes A and D: seven cases (58%) and six cases (55%), respectively.
Core promoter mutations 3 years after anti-hepatitis B e seroconversion in patients with chronic hepatitis B or hepatitis B and C infection and cancer remission.
PMID: 12358268
2002
The American journal of gastroenterology
Abstract: The G1896A precore stop codon mutation was never observed.
HBV mutation literature information.
PMID: 
2003
Hepatology (Baltimore, Md.)
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