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- W2074156639 abstract "The cellular c- myb gene encodes a transcription factor composed of a DNA-binding domain, a transactivating domain and a regulatory domain located at its carboxy (C-) terminus. The latter one is deleted in the transforming viral protein v-Myb. Here we show that deletion of the C-terminus of c-Myb increases the transcriptional transactivation activity of c-Myb defining it as cis -acting negative regulatory domain. Cotransfection of the Cterminus in an in vivo competition assay causes stimulation of the transcriptional activity of various vand c-Myb expression constructs in trans . The effect is dose-dependent and independent of the kind of DNAbinding domain, since c-Myb as well as GAL4-c-Myb chimaeras can be stimulated in trans . Other transcription factors, such as GAL4-VP16, GAL4, c-Jun or C/EBPβ are also stimulated by the cotransfected Cterminus. In contrast, human B-Myb is not stimulated by the c-Myb C-terminus in trans . The data suggest that the C-terminus of c-Myb may interact with a cellular inhibitor which is part of the protein complex mediating activated transcription and may stimulate in trans by sequestering away such an inhibitor. Binding of c-Myb to a putative inhibitor would explain differences between c-Myb in comparison to B- and v-Myb in transcriptional regulation." @default.
- W2074156639 created "2016-06-24" @default.
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- W2074156639 date "1994-01-01" @default.
- W2074156639 modified "2023-09-26" @default.
- W2074156639 title "The carboxyterminus of human c-myb protein stimulates activated transcription in<i>trans</i>" @default.
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- W2074156639 doi "https://doi.org/10.1093/nar/22.13.2466" @default.
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