title: Integration of hepatitis B virus DNA through a mutational hot spot within the cohesive region in a case of hepatocellular carcinoma.
abstract: Integrated hepatitis B virus (HBV) DNA previously cloned from a hepatocellular carcinoma genomic library derived from a Japanese patient was characterized further. Sequence analysis of restriction fragments bearing the virus-host junctions defined 3125 nucleotides of essentially un-rearranged HBV DNA of the adr subtype with the right junction mapping within the cohesive region at position 1970 and the left within the pre-core at position 1886. The right viral-host junction contains a 7 bp repeat (TGTAGGC) and a possible 2 bp inversion. The integrated HBV DNA includes the complete open reading frames for core, pre-S, S and polymerase and a 3' truncated X gene, and lacks most of the pre-core. Integration has occurred at a mutational hot spot of the viral genome and appears to be located in a region of semi-repetitive genomic DNA 3' to the beta-globin gene cluster.
authors.affiliation: Department of Medicine, St Mary's Hospital Medical School, London, U.K.
authors.forename: K
authors.initials: K
authors.lastname: Quade
authors.forename: J
authors.initials: J
authors.lastname: Saldanha
authors.forename: H
authors.initials: H
authors.lastname: Thomas
authors.forename: J
authors.initials: J
authors.lastname: Monjardino
mesh_terms: D001483:Base Sequence; D006528:Carcinoma, Hepatocellular / Q000235:genetics* / Q000382:microbiology; D003001:Cloning, Molecular; D004279:DNA, Viral / Q000235:genetics*; D006515:Hepatitis B virus / Q000235:genetics*; D008113:Liver Neoplasms / Q000235:genetics* / Q000382:microbiology; D008969:Molecular Sequence Data; D009154:Mutation / Q000235:genetics; D016366:Open Reading Frames / Q000235:genetics; D012091:Repetitive Sequences, Nucleic Acid / Q000235:genetics; D012689:Sequence Homology, Nucleic Acid; D016662:Virus Integration / Q000235:genetics*
chemical_list: D004279:DNA, Viral