Regulation of E2F1 function by the nuclear corepressor KAP1.

作者: Chuangui Wang , Frank J. Rauscher , W. Douglas Cress , Jiandong Chen

DOI: 10.1074/JBC.M704757200

关键词: Histone H3CorepressorE2F1Molecular biologyHistone deacetylase complexBiologyRing fingerE2F1 Transcription FactorTranscription (biology)Retinoblastoma protein

摘要: KAP1 is a nuclear corepressor with conserved domains for RING finger, B boxes, leucine zipper α helical coiled-coil region, plant homeo domain and bromo domain. The finger of cooperatively function as transcription repression by recruiting the histone deacetylase complex NuRD H3 lysine 9-specific methyltransferase SETDB1. Here we report that binds E2F1 factor in retinoblastoma protein (pRb)-independent fashion inhibits activity. stimulates formation E2F1-HDAC1 acetylation. Ectopic expression represses apoptosis functions independent pRb. Depletion endogenous pRb-deficient Saos2 cells RNA interference increases acetylation level, transcriptional activity, sensitizes response to DNA damage. Therefore, contributes negative regulation may serve partial backup prevent E2F1-mediated absence

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