HTLV-I Tax protein stimulation of DNA binding of bZIP proteins by enhancing dimerization.

HTLV-I Tax protein stimulation of DNA binding of bZIP proteins by enhancing dimerization.
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HTLV-I Tax 蛋白通过增强二聚化来刺激 bZIP 蛋白的 DNA 结合。

DOI:
10.1126/science.8211160
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发表时间:
1993
期刊:
影响因子:
56.9
通讯作者:
M. Green
M. Green
中科院分区:
综合性期刊1区
文献类型:
--
作者:
S. Wagner;M. Green

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人T细胞白血病病毒1型(HTLV-I)的Tax蛋白转录激活HTLV-I启动子。这种激活需要激活转录因子(ATF)蛋白的结合位点,ATF蛋白是含有碱性区域-亮氨酸拉链(bZIP)DNA结合结构域的细胞蛋白家族。所呈现的数据显示Tax增加多种ATF蛋白的体外DNA结合活性。Tax也刺激了其他bZIP蛋白的DNA结合,但不影响缺乏bZIP结构域的DNA结合蛋白。DNA结合的增加是因为Tax在不存在DNA的情况下促进bZIP结构域的二聚化,并且bZIP同二聚体的浓度升高然后促进DNA结合反应。这些结果有助于解释Tax如何激活病毒转录和转化细胞。
The Tax protein of human T cell leukemia virus type-1 (HTLV-I) transcriptionally activates the HTLV-I promoter. This activation requires binding sites for activating transcription factor (ATF) proteins, a family of cellular proteins that contain basic region-leucine zipper (bZIP) DNA binding domains. Data are presented showing that Tax increases the in vitro DNA binding activity of multiple ATF proteins. Tax also stimulated DNA binding by other bZIP proteins, but did not affect DNA binding proteins that lack a bZIP domain. The increase in DNA binding occurred because Tax promotes dimerization of the bZIP domain in the absence of DNA, and the elevated concentration of the bZIP homodimer then facilitates the DNA binding reaction. These results help explain how Tax activates viral transcription and transforms cells.
人类T细胞白血病病毒基因表达的调节需要多个序列元件。
DOI: 10.1073/pnas.84.14.4919
发表时间: 1987
影响因子: 11.1
作者:
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通讯作者: Haseltine,WA
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影响因子: 11.1
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