PMID- 10499802 OWN - NLM STAT- MEDLINE DCOM- 19991015 LR - 20190705 IS - 0092-8674 (Print) IS - 0092-8674 (Linking) VI - 98 IP - 6 DP - 1999 Sep 17 TI - Cdk phosphorylation triggers sequential intramolecular interactions that progressively block Rb functions as cells move through G1. PG - 859-69 AB - We present evidence that phosphorylation of the C-terminal region of Rb by Cdk4/6 initiates successive intramolecular interactions between the C-terminal region and the central pocket. The initial interaction displaces histone deacetylase from the pocket, blocking active transcriptional repression by Rb. This facilitates a second interaction that leads to phosphorylation of the pocket by Cdk2 and disruption of pocket structure. These intramolecular interactions provide a molecular basis for sequential phosphorylation of Rb by Cdk4/6 and Cdk2. Cdk4/6 is activated early in G1, blocking active repression by Rb. However, it is not until near the end of G1, when cyclin E is expressed and Cdk2 is activated, that Rb is prevented from binding and inactivating E2F. FAU - Harbour, J W AU - Harbour JW AD - Department of Ophthalmology and Visual Sciences, Washington University School of Medicine, St. Louis, Missouri 63110, USA. FAU - Luo, R X AU - Luo RX FAU - Dei Santi, A AU - Dei Santi A FAU - Postigo, A A AU - Postigo AA FAU - Dean, D C AU - Dean DC LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Cell JT - Cell JID - 0413066 RN - 0 (Carrier Proteins) RN - 0 (Cell Cycle Proteins) RN - 0 (Cyclin E) RN - 0 (DNA-Binding Proteins) RN - 0 (E2F Transcription Factors) RN - 0 (Peptide Fragments) RN - 0 (Proto-Oncogene Proteins) RN - 0 (Retinoblastoma Protein) RN - 0 (Retinoblastoma-Binding Protein 1) RN - 0 (Transcription Factor DP1) RN - 0 (Transcription Factors) RN - EC 2.7.11.1 (Protein-Serine-Threonine Kinases) RN - EC 2.7.11.22 (CDC2-CDC28 Kinases) RN - EC 2.7.11.22 (CDK2 protein, human) RN - EC 2.7.11.22 (CDK4 protein, human) RN - EC 2.7.11.22 (CDK6 protein, human) RN - EC 2.7.11.22 (Cyclin-Dependent Kinase 2) RN - EC 2.7.11.22 (Cyclin-Dependent Kinase 4) RN - EC 2.7.11.22 (Cyclin-Dependent Kinase 6) RN - EC 2.7.11.22 (Cyclin-Dependent Kinases) RN - EC 3.5.1.98 (Histone Deacetylases) RN - K3Z4F929H6 (Lysine) SB - IM MH - *CDC2-CDC28 Kinases MH - *Carrier Proteins MH - *Cell Cycle Proteins MH - Cyclin E/metabolism MH - Cyclin-Dependent Kinase 2 MH - Cyclin-Dependent Kinase 4 MH - Cyclin-Dependent Kinase 6 MH - Cyclin-Dependent Kinases/*metabolism MH - *DNA-Binding Proteins MH - E2F Transcription Factors MH - Female MH - G1 Phase/*physiology MH - *Gene Expression Regulation MH - Histone Deacetylases/metabolism MH - Humans MH - Lysine MH - Mutation MH - Peptide Fragments/genetics/*metabolism MH - Phosphorylation MH - Protein Binding MH - Protein Conformation MH - Protein-Serine-Threonine Kinases/metabolism MH - *Proto-Oncogene Proteins MH - Retinoblastoma Protein/genetics/*metabolism MH - Retinoblastoma-Binding Protein 1 MH - Transcription Factor DP1 MH - Transcription Factors/metabolism MH - Transcription, Genetic MH - Tumor Cells, Cultured EDAT- 1999/09/28 00:00 MHDA- 1999/09/28 00:01 CRDT- 1999/09/28 00:00 PHST- 1999/09/28 00:00 [pubmed] PHST- 1999/09/28 00:01 [medline] PHST- 1999/09/28 00:00 [entrez] AID - S0092-8674(00)81519-6 [pii] AID - 10.1016/s0092-8674(00)81519-6 [doi] PST - ppublish SO - Cell. 1999 Sep 17;98(6):859-69. doi: 10.1016/s0092-8674(00)81519-6.