Latent HIV-1 TAR Regulates 7SK-responsive P-TEFb Target Genes and Targets Cellular Immune Responses in the Absence of Tat.
Latent HIV-1 TAR Regulates 7SK-responsive P-TEFb Target Genes and Targets Cellular Immune Responses in the Absence of Tat.
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DOI:
10.1016/j.gpb.2017.05.003
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发表时间:
2017-10
期刊:
影响因子:
--
通讯作者:
Benecke AG
中科院分区:
文献类型:
--
作者:
Eilebrecht S;Benecke BJ;Benecke AG
The transactivating response element (TAR) structure of the nascent HIV-1 transcript is critically involved in the recruitment of inactive positive transcription elongation factor b (P-TEFb) to the promoter proximal paused RNA polymerase II. The viral transactivator Tat is responsible for subsequent P-TEFb activation in order to start efficient viral transcription elongation. In the absence of the viral transactivator of transcription (Tat), e.g., during latency or in early stages of HIV transcription, TAR mediates an interaction of P-TEFb with its inhibitor hexamethylene bis-acetamide-inducible protein 1 (HEXIM1), keeping P-TEFb in its inactive form. In this study, we address the function of HIV-1 TAR in the absence of Tat by analyzing consequences of HIV-1 TAR overexpression on host cellular gene expression. An RNA chimera consisting of Epstein-Barr virus-expressed RNA 2 (EBER2) and HIV-1 TAR was developed to assure robust overexpression of TAR in HEK293 cells. The overexpression results in differential expression of more than 800 human genes. A significant proportion of these genes is involved in the suppression of cellular immune responses, including a significant set of 7SK-responsive P-TEFb target genes. Our findings identify a novel role for HIV-1 TAR in the absence of Tat, involving the interference with host cellular immune responses by targeting 7SK RNA-mediated gene expression and P-TEFb inactivation.
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影响因子:
4.5
作者:
Dümpelmann, E;Mittendorf, H;Benecke, BJ
通讯作者:
Benecke, BJ
DOI:
10.1073/pnas.78.2.805
发表时间:
1981-01-01
期刊:
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子:
--
作者:
LERNER, MR;ANDREWS, NC;STEITZ, JA
通讯作者:
STEITZ, JA
影响因子:
5.5
作者:
Benecke AG;Eilebrecht S
通讯作者:
Eilebrecht S
影响因子:
64.8
作者:
Dong, C;Juedes, AE;Flavell, RA
通讯作者:
Flavell, RA
DOI:
10.1101/sqb.1998.63.371
发表时间:
1998-01-01
期刊:
COLD SPRING HARBOR SYMPOSIA ON QUANTITATIVE BIOLOGY
影响因子:
--
作者:
Garber, ME;Wei, P;Jones, KA
通讯作者:
Jones, KA