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Pathways

Cell Cycle Control by BTG Proteins

Description:

BTG2 (BTG Family Member-2) is endowed with antiproliferative activity. The expression of BTG2 in cycling cells induces accumulation of hypophosphorylated, growth-inhibitory forms of Rb (Retinoblastoma) and led to G1 arrest through impairment of DNA synthesis. Overexpression of CcnD1 (Cyclin-D1) counteracts G1 arrest. Rb is a nuclear phosphoprotein whose phosphorylation state oscillates regularly during the cell cycle. Its under-phosphorylated forms predominate in G0 and G1, while highly phosphorylated forms exist in S, G2 and...

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