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- W2022043882 abstract "The HIV transcriptional activator Tat is acetylated by p300 at a single lysine residue in the TAR RNA binding domain. We have generated monoclonal and polyclonal antibodies specific for the acetylated form of Tat (AcTat). Microinjection of anti-AcTat antibodies inhibited Tat-mediated transactivation in cells. Similarly, the p300 inhibitor Lys-CoA and siRNA specific for p300 suppressed Tat transcriptional activity. Full-length synthetic AcTat bound to TAR RNA with the same affinity as unacetylated Tat, but formation of a Tat-TAR-CyclinT1 ternary complex was completely inhibited in the presence of AcTat. We propose that Tat acetylation may help in dissociating the Tat cofactor CyclinT1 from TAR RNA and serve to transfer Tat onto the elongating RNA polymerase II." @default.
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- W2022043882 date "2003-07-01" @default.
- W2022043882 modified "2023-10-16" @default.
- W2022043882 title "Acetylation of Tat Defines a CyclinT1-Independent Step in HIV Transactivation" @default.
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- W2022043882 doi "https://doi.org/10.1016/s1097-2765(03)00245-4" @default.
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