A significant amount of experimental evidence has demonstrated that progression of the cell cycle in mammalian cells is associated with periodic transcriptional activation/ repression of growth-regulatory genes. We summarize our current knowledge and views on the role of the critical cell cycle regulators such as the retinoblastoma proteins in transcription repression and their functional connections with various different transcription factors. In addition, we discuss the role of oncogenes such as TIF1 alpha, PML and RFL which belong to a characteristic subgroup of RING finger proteins that contain the RING finger (C3HC4 zinc finger) the B-boxes and a putative coiled-coil (RBCC configuration) as mediators of transcription repression.

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