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- W2040635272 abstract "HTLV-I bZIP factor (HBZ) contains a C-terminal zipper domain involved in its interaction with c-Jun. This interaction leads to a reduction of c-Jun DNA-binding activity and prevents the protein from activating transcription of AP-1-dependent promoters. However, it remained unclear whether the negative effect of HBZ-SP1 was due to its weak DNA-binding activity or to its capacity to target cellular factors to transcriptionally-inactive nuclear bodies. To answer this question, we produced a mutant in which specific residues present in the modulatory and DNA-binding domain of HBZ-SP1 were substituted for the corresponding c-Fos amino acids to improve the DNA-binding activity of the c-Jun/HBZ-SP1 heterodimer. The stability of the mutant, its interaction with c-Jun, DNA-binding activity of the resulting heterodimer, and its effect on the c-Jun activity were tested. In conclusion, we demonstrate that the repression of c-Jun activity in vivo is mainly due to the HBZ-SP1-mediated sequestration of c-Jun to the HBZ-NBs." @default.
- W2040635272 created "2016-06-24" @default.
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- W2040635272 date "2009-09-01" @default.
- W2040635272 modified "2023-10-13" @default.
- W2040635272 title "Propensity for HBZ-SP1 isoform of HTLV-I to inhibit c-Jun activity correlates with sequestration of c-Jun into nuclear bodies rather than inhibition of its DNA-binding activity" @default.
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- W2040635272 doi "https://doi.org/10.1016/j.virol.2009.06.027" @default.
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