Abstract
A number of examples of noncoding RNA-connected chromatin modifications in eukaryotes has been recently revealed. Four cases are under detailed consideration in the present review, namely Xist RNA-dependent X-chromosome inactivation in mammals, roX RNA-dependent hyperactivation of X-chromosome in the fruit fly (in both cases the goal is dosage compensation, equalization of transcription level from two X chromosomes in females and one in males), and two examples of RNAi-connected down-regulation of transcription—siRNA-dependent heterochromatin formation in fission yeast and RdDM (RNA-dependent DNA methylation) in plants (FWA gene regulation in Arabidopsis). Although overall quite different, each phenomenon demonstrates some common features of RNA-driven chromatin modification process, including the role of RNA in aiming of chromatin-modifying protein complexes to their targets and subsequent formation of self-maintaining specific chromatin conformation (DNA methylation, changes in histone code, and binding of self-assembling protein complexes).
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Abbreviations
- DCC:
-
dosage compensation complex
- DDM1:
-
decrease in DNA methylation 1
- DMT:
-
DNA methyltransferase
- HAT:
-
histone acetyltransferase
- HDAC:
-
histone deacetylase
- HMG:
-
high mobility group
- HMT:
-
histone methyltransferase
- HP1:
-
heterochromatic protein 1
- MBD:
-
methylcytosine binding domain
- PC:
-
Polycomb
- PcG:
-
Polycomb group
- RdDM:
-
RNA-dependent DNA methylation
- RDRC:
-
RNA-directed RNA polymerase complex
- RISC:
-
RNA-induced silencing complex
- RITS:
-
RNA-induced transcriptional silencing
- RNAi:
-
RNA interference
- siRNA:
-
short interfering RNA
- Xic:
-
X-chromosome inactivation center
- Xist:
-
X-inactive specific transcript
- Xite:
-
X-inactivation intergenic transcription element.
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Original Russian Text © S. A. Lavrov, M. V. Kibanov, 2007, published in Uspekhi Biologicheskoi Khimii, 2007, Vol. 47, pp. 53–88.
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Lavrov, S.A., Kibanov, M.V. Noncoding RNAs and chromatin structure. Biochemistry Moscow 72, 1422–1438 (2007). https://doi.org/10.1134/S0006297907130020
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DOI: https://doi.org/10.1134/S0006297907130020