title: New genotypes of TT virus (TTV) and a genotyping assay based on restriction fragment length polymorphism.
abstract: A phylogenetic analysis, using the open reading frame I sequence of 93 TT viruses (TTV) obtained from various geographical areas, indicated that the virus could be classified into six different genotypes including three hitherto unreported genotypes. The high reliability of the six clusters was confirmed by bootstrap analysis. On the basis of these sequence data, a new simple genotyping assay based on a restriction fragment length polymorphism of TTV was developed. Using the enzymes NdeI and PstI, followed by cleavage with NlaIII or MseI, it was possible to distinguish between the six TTV genotypes. This system will provide the framework for future detailed epidemiological and clinical investigations.
authors.affiliation: Second Department of Medicine, Nagoya City University Medical School, Mizuho, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Tanaka
authors.forename: M
authors.initials: M
authors.lastname: Mizokami
authors.forename: E
authors.initials: E
authors.lastname: Orito
authors.forename: T
authors.initials: T
authors.lastname: Ohno
authors.forename: T
authors.initials: T
authors.lastname: Nakano
authors.forename: T
authors.initials: T
authors.lastname: Kato
authors.forename: H
authors.initials: H
authors.lastname: Kato
authors.forename: M
authors.initials: M
authors.lastname: Mukaide
authors.forename: Y M
authors.initials: YM
authors.lastname: Park
authors.forename: B S
authors.initials: BS
authors.lastname: Kim
authors.forename: R
authors.initials: R
authors.lastname: Ueda
mesh_terms: D001483:Base Sequence; D004267:DNA Viruses / Q000145:classification / Q000235:genetics*; D004279:DNA, Viral / Q000032:analysis / Q000145:classification / Q000235:genetics; D005838:Genotype; D006525:Hepatitis, Viral, Human / Q000821:virology*; D006801:Humans; D008969:Molecular Sequence Data; D010802:Phylogeny; D012150:Polymorphism, Restriction Fragment Length; D012689:Sequence Homology, Nucleic Acid
chemical_list: D004279:DNA, Viral