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• W2014981664 abstract "In our search for new partners of the HIV-1 envelope glycoprotein (Env), we found that the cytoplasmic domain of the TMgp41 (TMgp41 CD) subunit of HIV-1 Env interacted with Luman, a transcription factor of the CREB/ATF family. Luman is anchored in the endoplasmic reticulum membrane and subjected to activation by regulated intramembrane proteolysis (RIP). The RIP process permits the release of the activated amino-terminal fragment of Luman into the cytoplasm, and its import into the nucleus. Here, we demonstrate that interaction between the TMgp41 CD and Luman requires a region encompassing the b-Zip and TM domains of Luman and decreases the stability of this factor. Moreover, we found that overexpression of a constitutively active form of Luman in cells transfected with HXB2R HIV-1 provirus decreased the intracellular expression of Gag and Env and led to a decrease in virion release. This negative effect of activated Luman on HIV-1 production was correlated to the inhibition of Tat transactivation of the HIV-1 LTR, which might be related to an interaction of activated Luman with Tat. Altogether, these results show that Luman acts as a partner of two major HIV-1 proteins: the TMgp41 Env subunit and Tat. The interaction between the TMgp41 subunit of Env and Luman affects the stability of the full-length Luman protein, the precursor of the activated, nuclear form of Luman, which acts negatively on Tat-mediated HIV-1 transactivation." @default.
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• W2014981664 date "2006-12-01" @default.
• W2014981664 modified "2023-10-18" @default.
• W2014981664 title "Luman, a New Partner of HIV-1 TMgp41, Interferes with Tat-mediated Transcription of the HIV-1 LTR" @default.
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• W2014981664 doi "https://doi.org/10.1016/j.jmb.2006.09.080" @default.
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