ArticleMolecular biology of the cell2010
Paradoxical instability-activity relationship defines a novel regulatory pathway for retinoblastoma proteins.
Article in Molecular biology of the cell, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 19 citations in OpenAlex.
- Retinoblastoma protein activity revealed by CRISPRi study of divergent Rbf1 and Rbf2 paralogs.G3 (Bethesda, Md.) · 2024Article
- Cell cycle expression of polarity genes features Rb targeting of Vang.Cells & development · 2022Article
- Selective repression of the Drosophila cyclin B promoter by retinoblastoma and E2F proteins.Biochimica et biophysica acta. Gene regulatory mechanisms · 2020Article
- Diversification of Retinoblastoma Protein Function Associated with Cis and Trans Adaptations.Molecular biology and evolution · 2019Article
- Rbf Activates the Myogenic Transcriptional Program to Promote Skeletal Muscle Differentiation.Cell reports · 2019Article
- The Evolutionarily Conserved C-terminal Domains in the Mammalian Retinoblastoma Tumor Suppressor Family Serve as Dual Regulators of Protein Stability and Transcriptional Potency.The Journal of biological chemistry · 2015Article
- Genome-Wide Analysis of Drosophila RBf2 Protein Highlights the Diversity of RB Family Targets and Possible Role in Regulation of Ribosome Biosynthesis.G3 (Bethesda, Md.) · 2015Article
- Role of Drosophila retinoblastoma protein instability element in cell growth and proliferation.Cell cycle (Georgetown, Tex.) · 2015Article
- Integrated stability and activity control of the Drosophila Rbf1 retinoblastoma protein.The Journal of biological chemistry · 2014Article
- The pro-apoptotic activity of Drosophila Rbf1 involves dE2F2-dependent downregulation of diap1 and buffy mRNA.Cell death & disease · 2014Article
- Ubiquitination of retinoblastoma family protein 1 potentiates gene-specific repression function.The Journal of biological chemistry · 2012Article
- Evidence for autoregulation and cell signaling pathway regulation from genome-wide binding of the Drosophila retinoblastoma protein.G3 (Bethesda, Md.) · 2012Article
- Rbf1 degron dysfunction enhances cellular DNA replication.Cell cycle (Georgetown, Tex.) · 2012Article
Corrections and comments
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Authors and funding
8 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The retinoblastoma (RB) transcriptional corepressor and related family of pocket proteins play central roles in cell cycle control and development, and the regulatory networks governed by these factors are frequently inactivated during tumorigenesis. During normal growth, these proteins are subject to tight control through at least two mechanisms. First, during cell cycle progression, repressor potential is down-regulated by Cdk-dependent phosphorylation, resulting in repressor dissociation from E2F family transcription factors. Second, RB proteins are subject to proteasome-mediated destruction during development. To better understand the mechanism for RB family protein instability, we characterized Rbf1 turnover in Drosophila and the protein motifs required for its destabilization. We show that specific point mutations in a conserved C-terminal instability element strongly stabilize Rbf1, but strikingly, these mutations also cripple repression activity. Rbf1 is destabilized specifically in actively proliferating tissues of the larva, indicating that controlled degradation of Rbf1 is linked to developmental signals. The positive linkage between Rbf1 activity and its destruction indicates that repressor function is governed in a manner similar to that described by the degron theory of transcriptional activation. Analogous mutations in the mammalian RB family member p107 similarly induce abnormal accumulation, indicating substantial conservation of this regulatory pathway.
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