Nuclear Factor 90(NF90) targeted to TAR RNA inhibits transcriptional activation of HIV-1.
Nuclear Factor 90(NF90) targeted to TAR RNA inhibits transcriptional activation of HIV-1.
复制标题
核因子90(NF90)靶向焦油RNA抑制HIV-1的转录激活。
DOI:
10.1186/1742-4690-4-41
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发表时间:
2007-06-12
期刊:
影响因子:
3.3
通讯作者:
Kumar, Ajit
中科院分区:
文献类型:
--
作者:
Agbottah, Emmanuel T.;Traviss, Christine;McArdle, James;Karki, Sambhav;St Laurent, Georges C., III;Kumar, Ajit
Examination of host cell-based inhibitors of HIV-1 transcription may be important for attenuating viral replication. We describe properties of a cellular double-stranded RNA binding protein with intrinsic affinity for HIV-1 TAR RNA that interferes with Tat/TAR interaction and inhibits viral gene expression. Utilizing TAR affinity fractionation, North-Western blotting, and mobility-shift assays, we show that the C-terminal variant of nuclear factor 90 (NF90ctv) with strong affinity for the TAR RNA, competes with Tat/TAR interaction in vitro. Analysis of the effect of NF90ctv-TAR RNA interaction in vivo showed significant inhibition of Tat-transactivation of HIV-1 LTR in cells expressing NF90ctv, as well as changes in histone H3 lysine-4 and lysine-9 methylation of HIV chromatin that are consistent with the epigenetic changes in transcriptionally repressed gene. Structural integrity of the TAR element is crucial in HIV-1 gene expression. Our results show that perturbation Tat/TAR RNA interaction by the dsRNA binding protein is sufficient to inhibit transcriptional activation of HIV-1.
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影响因子:
3.3
作者:
Kumar A
通讯作者:
Kumar A
影响因子:
4.8
作者:
Chun, RF;Jeang, KT
通讯作者:
Jeang, KT
影响因子:
5.4
作者:
Mhashilkar, AM;Biswas, DK;Marasco, WA
通讯作者:
Marasco, WA
影响因子:
64.5
作者:
BERKHOUT, B;SILVERMAN, RH;JEANG, KT
通讯作者:
JEANG, KT
影响因子:
3.7
作者:
LAUGHLIN, MA;ZEICHNER, S;GONZALEZSCARANO, E
通讯作者:
GONZALEZSCARANO, E