Abstract：
:The carboxyl terminus of c-Myb contains a negative regulatory domain that is absent in the v-Myb oncoprotein, but conserved among all the known Myb proteins of animals. This domain inhibits transcriptional activation by c-Myb in animal cells, but not in budding yeast, suggesting that additional protein(s) present in animal cells but not yeast are required for this negative regulatory function. A yeast two-hybrid screen identified BS69, an adenovirus E1A-associated protein, as interacting with the carboxy-terminal region of c-Myb. BS69 contains regions of similarity to the PHD finger, the bromodomain, and the MYND domain, all of which are found in other proteins present in high molecular weight complexes that regulate transcription and/or modify chromatin structure. Further study showed that BS69 inhibited the transcriptional activity of c-Myb, that this inhibition was specific, that it mapped to the carboxyl termini of the two proteins and that it was dose-dependent. A direct interaction between these two proteins was observed in vitro. Furthermore, the 289R E1A protein could inhibit the BS69-mediated decrease in transcriptional activation by c-Myb. By analogy with the inhibition of the Rb/E2F regulatory axis by E1A, we propose that a BS69/Myb regulatory circuit may also be a target of disruption during oncogenesis. Oncogene (2001) 20, 125 - 132.
journal_name
Oncogenejournal_title
Oncogeneauthors
Ladendorff NE,Wu S,Lipsick JSdoi
10.1038/sj.onc.1204048subject
Has Abstractpub_date
2001-01-04 00:00:00pages
125-32issue
1eissn
0950-9232issn
1476-5594pii
1204048journal_volume
20pub_type
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