DP and E2F proteins: coordinating transcription with cell cycle progression
- PMID: 7880534
- DOI: 10.1016/0955-0674(94)90057-4
DP and E2F proteins: coordinating transcription with cell cycle progression
Abstract
Transcriptional control during the G1/S transition is important in regulating cell cycle progression. The transcription factor DRTF1/E2F is believed to play a crucial role in this process by integrating the activity of the machinery that drives the cell cycle with the transcription apparatus. Being the point of convergence for growth-promoting and growth-inhibitory signals, it is a pivotal cellular target for molecules which subvert normal cell cycle control, such as oncoviral proteins. Recent studies have indicated that members of two distinct families of proteins, DP and E2F, interact combinatorially as DP/E2F heterodimers in DRTF1/E2F. The activities of both DP and E2F proteins are under cell cycle control, being influenced by the level of phosphorylation imparted through the cell cycle regulated activity of cyclin-dependent kinases. Both DP and E2F proteins are endowed with proto-oncogenic activity and, conversely, have been implicated in regulating apoptosis. Current evidence suggests therefore that the activity of DRTF1/E2F is instrumental in regulating progression through the cell cycle.
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