title: Comparative analysis of nucleotide sequences of the partial envelope gene (5' domain) among human T lymphotropic virus type I (HTLV-I) isolates.
abstract: Human T-cell lymphotropic virus type I (HTLV-I) is associated with adult T-cell leukemia/lymphoma (ATL) and HTLV-I-associated myelopathy/tropical spastic paraparesis (HAM/TSP). The nucleotide sequences of 640 bp of the proviral genome (positions 5158-5797) derived from 11 HTLV-I-infected persons were analyzed using the polymerase chain reaction and M13-based sequencing techniques. Patterns of single nucleotide substitutions were characterized from the extracellular domain of the envelope gene (gp46). Compared with other retroviruses, the nucleotide sequences of the HTLV-I external envelope gene are highly conserved among the genotypes studied. We found no evidence of dual infections with HTLV-II among the seropositive asymptomatic persons or in patients with either ATL or HAM/TSP. No unique sequence differences were observed in the envelope gene of the HTLV-I isolates derived from patients coinfected with human immunodeficiency virus type 1 (HIV-1). However, comparative analysis of these data and other published HTLV-I envelope sequences indicated the presence of four subtypes of HTLV-I in relation to their geographic origin.
authors.affiliation: Retrovirus Diseases Branch, Centers for Disease Control, Atlanta, Georgia 30333.
authors.forename: B K
authors.initials: BK
authors.lastname: De
authors.forename: M D
authors.initials: MD
authors.lastname: Lairmore
authors.forename: K
authors.initials: K
authors.lastname: Griffis
authors.forename: L J
authors.initials: LJ
authors.lastname: Williams
authors.forename: F
authors.initials: F
authors.lastname: Villinger
authors.forename: T C
authors.initials: TC
authors.lastname: Quinn
authors.forename: C
authors.initials: C
authors.lastname: Brown
authors.lastname: Nzilambi
authors.forename: M
authors.initials: M
authors.lastname: Sugimoto
authors.forename: S
authors.initials: S
authors.lastname: Araki
mesh_terms: D001483:Base Sequence; D015752:Genes, env; D015490:HTLV-I Infections / Q000382:microbiology*; D015368:Human T-lymphotropic virus 1 / Q000235:genetics*; D006801:Humans; D008969:Molecular Sequence Data; D009841:Oligonucleotides / Q000737:chemistry; D016133:Polymerase Chain Reaction; D012689:Sequence Homology, Nucleic Acid
chemical_list: D009841:Oligonucleotides