Cited by 112Genomics and Chromatin DynamicsEpigenetics and DNA MethylationChromatin Remodeling and Cancer

Role of Rb Family in the Epigenetic Definition of Chromatin

Open access
Gonzalo, Susana, Blasco, Maria A·2005·Cell Cycle

Abstract

Epigenetic changes can influence a variety of cellular processes from regulation of gene transcription to proper chromosome segregation. The molecular activities that dictate the assembly, maintenance and regulation of chromatin structure are beginning to be identified. A recent study demonstrates that the Rb family of tumor suppressors plays a major role in global chromatin structure. In addition to the well-known function of Rb family inducing a repressive chromatin state around euchromatic promoters, Rb proteins have a direct role in the assembly of pericentric and telomeric heterochromatin domains. In particular, the Rb family maintains histone 4 lysine 20 tri-methylation (H4K20) at these constitutive heterochromatin domains. Lack of the Rb family results in decreased H4K20 tri-methylation, coincidental with chromosome segregation defects and abnormal telomere elongation, two processes frequently altered in human cancer. Maintenance of heterochromatic domains, such as those of centromeres and telomeres, may represent a novel tumor suppressor function for the Rb family by ensuing genomic stability.

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  • RB is an adaptor protein that recruits chromatin remodelling enzymes to control specific target genes and modify chromatin structure chromosome-wide.

    “Furthermore, RB is also an adaptor protein that recruits chromatin remodelling enzymes to control the expression of specific target genes and to modify chromatin structure at a chromosome-wide level13,14”

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Authors
Gonzalo, S., & Blasco, M. A.
Affiliations
Spanish National Cancer Research Centre (ES)
Venue
Cell Cycle
Published
2005-04-08
Volume
4
Issue
6
Pages
752-755
ISSN
  • 1538-4101 (ISSN-L)
  • 1551-4005
OpenAlex
W2085216724
Cited by
112
References
0
Citations by year
2026: 2 · 2025: 1 · 2024: 3 · 2023: 3 · 2022: 2 · 2021: 6 · 2020: 1 · 2019: 3 · 2018: 5 · 2017: 4 · 2016: 6 · 2015: 6 · 2014: 4 · 2013: 9 · 2012: 10
FWCI
2.26
Type
journal article
Language
en
Open access
Locations
  • Cell Cycle (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation
  • European Commission (LSHC-CT-2003-506803, FOOD-CT-2003-506850)
  • Ministerio de Ciencia y Tecnología
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chromatin Remodeling and Cancer
Keywords
retinoblastoma protein, chromatin structure, heterochromatin, telomeres, centromere, H4K20 trimethylation, tumor suppressor function, chromosome segregation, telomere elongation, genome stability, transcriptional regulation
MeSH terms
Multigene Family, Heterochromatin, Humans, Promoter Regions, Genetic, Retinoblastoma Protein, Chromatin Assembly and Disassembly, Epigenesis, Genetic

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