Abstract
Foamy virus (FV) Bel1/Tas transactivators act as key regulators of gene expression and directly bind DNA Bel1 response elements (BREs) in both the internal (IP) and 5'LTR promoters. Here, we report the mapping and the virus species specificity of the nonhomologous feline foamy virus (FFV) BREs in both promoters. The data indicate that FFV Bel1 did not bind the primate FV IP.BRE and that primate FV Bel1 was not capable of binding the FFV IP.BRE. In addition, we show that the C-terminal activation domain of FFV Bel1 does not contribute to DNA binding because a C-terminal trans-dominant negative FFV Bel1 mutant was still able to bind to both promoters.
Publication types
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Comparative Study
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Research Support, Non-U.S. Gov't
MeSH terms
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5' Untranslated Regions
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Animals
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Cats
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Cells, Cultured
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DNA-Binding Proteins / genetics
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DNA-Binding Proteins / metabolism*
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Gene Expression Regulation, Viral*
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Mutation
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Primates
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Promoter Regions, Genetic
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Retroviridae Proteins / genetics
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Retroviridae Proteins / metabolism*
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Species Specificity
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Spumavirus / genetics
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Spumavirus / metabolism*
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Spumavirus / pathogenicity
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Terminal Repeat Sequences
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Trans-Activators / genetics
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Trans-Activators / metabolism*
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Transcriptional Activation
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Viral Proteins / genetics
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Viral Proteins / metabolism
Substances
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5' Untranslated Regions
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DNA-Binding Proteins
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Retroviridae Proteins
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Trans-Activators
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Viral Proteins
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bel1 protein, Human foamy virus