Nucleotide sequence analysis of human T cell leukemia virus, type II (HTLV-II) isolates.
Nucleotide sequence analysis of human T cell leukemia virus, type II (HTLV-II) isolates.
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人 T 细胞白血病病毒 II 型 (HTLV-II) 分离株的核苷酸序列分析。
DOI:
10.1089/aid.1993.9.721
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发表时间:
1993
影响因子:
1.5
通讯作者:
Hall,WW
中科院分区:
文献类型:
--
作者:
Takahashi,H;Zhu,SW;Ijichi,S;Vahlne,A;Suzuki,H;Hall,WW
A study by Hallet al. (J Virol 1992;66:2456-2463; Ref. 11) has suggested the existence of two closely related molecular subtypes of HTLV-II, which were tentatively designated HTLV-Ha and HTLV-IIb. To confirm this nucleotide sequence analysis of 986 bp of the env gene region encoding the entire surface glycoprotein, gp46, and the amino terminus of the transmembrane glycoprotein, gp21, of 10 HTLV-II isolates was carried out. The results clearly established the existence of two subtypes and demonstrated a 4.3% divergence in sequence in this region. Analysis of other gene regions of the provirus, including thepol(1544 bp),gag(448 bp), and the entire LTR (743 bp) of two representative isolates of each subtype, showed a sequence divergence of 3.8 to 5.7%, with greatest divergence occurring in the LTR. In addition to single nucleotide changes, thegagregions encoding the structural protein, pl9, of the HTLV-IIb isolates were also found to have a 66-bp deletion that would be expected to result in a p19 protein having a 22-amino acid deletion in the carboxy-terminus region. Attempts to exploit this to differentiate the two subtypes serologically were unsuccessful in that recombinant pl9 proteins of both subtypes were found to be antigenically cross-reactive. The finding of two molecular subtypes of HTLV-II may have important implications for a better understanding of the biological and pathogenic properties of the virus, and will be useful in characterizing the viruses present in endemic foci in American Indian populations.
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影响因子:
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作者:
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通讯作者:
Ratner,L
影响因子:
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作者:
R. Khabbaz;D. Hartel;M. Lairmore;C. Horsburgh;E. Schoenbaum;B. Roberts;T. M. Hartley;G. Friedland
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通讯作者:
Poiesz,BJ
DOI:
--
发表时间:
1991
影响因子:
11.1
作者:
R. Yanagihara;V. Nerurkar;R. Garruto;M. Miller;M. Leon;C. L. Jenkins;R. Sanders;P. Liberski;M. Alpers;D. Gajdusek
通讯作者:
D. Gajdusek
影响因子:
3.8
作者:
Karim T. A. Malik;Jos Even;Abraham Karpas
通讯作者:
Abraham Karpas