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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Activity of human immunodeficiency virus type 1 promoter/TAR regions and tat1 genes derived from individuals with different rates of disease progression.

Different rates of disease progression may be associated with different human immunodeficiency virus type 1 (HIV-1) promoter and/or transactivator activities. We therefore analyzed the sequences and activities of the first exon of Tat, tat1, and the promoter/trans-acting responsive (TAR) regions amplified directly from peripheral blood mononuclear cells obtained from five long-term nonprogressors and eight progressing HIV-1-infected individuals. The majority of tat1 alleles and promoter/TAR regions from all patients were intact and showed comparable activities in transient reporter assays. A substantial number of point mutations and some length variations were observed in the promoter/TAR region. In a single nonprogressor, the Sp1 binding site 3 was consistently altered and the transcriptional activity in the presence of Tat was diminished. Some LTR clones from a rapid progressor contained a fourth Sp1 binding site, which was associated with an elevated basal promoter activity. These data suggest that defects in the promoter/TAR region or tat1 are rare and that different promoter/transactivator activities are not commonly associated with different progression rates.[1]


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