Abstract
Along the lines of established players like chromatin modifiers and transcription factors, noncoding RNA (ncRNA) are now widely accepted as one of the key regulatory molecules in epigenetic regulation of transcription. With increasing evidence of ncRNAs in the establishment of gene silencing through their ability to interact with major chromatin modifiers, in the current review, we discuss their prospective role in the area of inheritance and maintenance of these established silenced states which can be reversible or irreversible in nature. In addition, we attempt to understand and speculate how these RNA dependent or independent maintenance mechanisms differ between each other in a developmental stage, tissue, and gene-specific manner in different biological contexts by utilizing known/unknown regulatory factors.
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Abbreviations
- DMR:
-
Differentially methylated region
- Dnmt1:
-
DNA (cytosine-5)-methyltransferase 1
- Dnmt3a:
-
DNA (cytosine-5)-methyltransferase 3 alpha
- Dnmt3b:
-
DNA (cytosine-5)-methyltransferase 3 beta
- Eed:
-
Embryonic ectoderm development
- ES cells:
-
Embryonic stem cells
- EZH2:
-
Enhancer of zeste homolog 2
- H3K4me1:
-
Histone H3 monomethylated at lysine 4
- H3K4me3:
-
Histone H3 trimethylated at lysine 4
- H3K27Ac:
-
Histone H3 acetylated at lysine 27
- H3K27me3:
-
Histone H3 trimethylated at lysine 27
- Kb:
-
Kilobase
- lncRNA:
-
Long noncoding RNA
- MEFs:
-
Mouse embryonic fibroblasts
- ncRNA:
-
Noncoding RNA
- PcG:
-
Polycomb group of proteins
- PIGs:
-
Placentally imprinted genes
- piRNA:
-
Piwi-interacting RNA
- pit-RNA:
-
piRNA-targeted long noncoding RNA
- PRC1:
-
Polycomb Repressive Complex 1
- PRC2:
-
Polycomb Repressive Complex 2
- Suz12:
-
Suppressor Of Zeste 12 Homolog
- TrxG:
-
Trithorax Group proteins
- UIGs:
-
Ubiquitously imprinted genes
- Xa:
-
Active X chromosome
- XCI:
-
X chromosome inactivation
- Xi:
-
Inactive X chromosome
- Xist:
-
X-inactive specific transcript
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Acknowledgments
This work was supported by the grants from the Swedish Cancer Research foundation (Cancerfonden: Kontrakt no.100422), Swedish Research Council (VR-M:K2011-66X-20781-04-3; VR-NT: 621-2011-4996), and Barncancerfonden (PROJ11/067) to CK. CK is a Senior Research Fellow supported by VR-M.
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Responsible Editors: Brian P. Chadwick, Kristin C. Scott, and Beth A. Sullivan
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Mondal, T., Kanduri, C. Maintenance of epigenetic information: a noncoding RNA perspective. Chromosome Res 21, 615–625 (2013). https://doi.org/10.1007/s10577-013-9385-5
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DOI: https://doi.org/10.1007/s10577-013-9385-5