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• W2170249039 endingPage "3732" @default.
• W2170249039 startingPage "3723" @default.
• W2170249039 abstract "The four C-terminal GLI-Krüppel type zinc fingers of YY1 have been identified as a transcriptional repression domain. Previous reports have proposed DNA-bending and activator-quenching mechanisms for this zinc finger-mediated repression. In addition, previous work indicated that p300 and CBP might be involved in YY1-mediated repression. We have analyzed these possible models for the zinc finger-mediated repression. The role of each zinc finger in the repression and DNA-binding functions was determined by using a structure-and-function approach. We show that zinc finger 2 of YY1 plays a central role in both DNA binding and transcriptional repression. However, a survey of a panel of YY1 mutants indicates that these two functions can be separated, which argues against the DNA-bending model for repression. We show that the physical interaction between YY1 and p300, a coactivator for CREB, is not sufficient for repression of CREB-mediated transcription. Our studies indicate that YY1 functions as an activator-specific repressor. Repression of CTF-1-directed transcription may be accomplished through direct physical interaction between YY1 and this activator. In contrast, physical interaction is not necessary for YY1 to repress Sp1- and CREB-mediated transcription. Rather, the repression likely reflects an ability of YY1 to interfere with communication between these activators and their targets within the general transcription machinery. Taken together, our results suggest that YY1 employs multiple mechanisms to achieve activator-specific repression." @default.
• W2170249039 created "2016-06-24" @default.
• W2170249039 creator A5022752821 @default.
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• W2170249039 date "1997-07-01" @default.
• W2170249039 modified "2023-10-10" @default.
• W2170249039 title "Multiple Mechanisms of Transcriptional Repression by YY1" @default.
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• W2170249039 doi "https://doi.org/10.1128/mcb.17.7.3723" @default.
• W2170249039 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/232224" @default.
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• W2170249039 hasPublicationYear "1997" @default.
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