Location of cis-acting regulatory sequences in the human T-cell leukemia virus type I long terminal repeat.

Location of cis-acting regulatory sequences in the human T-cell leukemia virus type I long terminal repeat.
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人 T 细胞白血病病毒 I 型长末端重复序列中顺式作用调节序列的位置。

DOI:
10.1073/pnas.82.19.6502
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发表时间:
1985
影响因子:
11.1
通讯作者:
Haseltine,WA
Haseltine,WA
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Rosen,CA;Sodroski,JG;Haseltine,WA

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确定了人T细胞白血病病毒I型(HTLV-1)长末端重复序列(LTR)内顺式作用调节区的位置。存在于核苷酸-350和-55(帽位点+1)之间的序列含有在淋巴和非淋巴细胞系中有活性的增强子元件。位于“TATA”和RNA起始位点附近的序列含有启动子,其活性可通过同源和异源增强子元件增强。对HTLV-1和HTLV II型感染细胞中存在的反式作用转录因子有反应的区域位于核苷酸-159和+315之间。HTLV-I LTR缺失突变体以类似的方式对感染细胞中存在的反式作用因子和由基因组的x-lor区域编码的达特蛋白作出反应,从而提供了进一步的证据,证明达特蛋白介导HTLV感染细胞中LTR的转录反式激活。
The location of cis-acting regulatory regions within the long terminal repeat (LTR) of the human T-cell leukemia virus type I (HTLV-1) was determined. The sequences present between nucleotides -350 and -55 (cap site +1) contain an enhancer element that is active in lymphoid and nonlymphoid cell lines. The sequences located near the "TATA" and RNA initiation sites contain a promoter, the activity of which can be augmented by homologous and heterologous enhancer elements. A region responsive to trans-acting transcription factors present in HTLV-I- and HTLV type II-infected cells is located between nucleotides -159 and +315. HTLV-I LTR deletion mutants respond in a similar manner both to the trans-acting factors present in infected cells and to the tat protein encoded by the x-lor region of the genome, thus providing further evidence that the tat protein mediates transcriptional trans-activation of the LTR in HTLV-infected cells.
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