Abstract
The nucleus is a highly compartmentalized structure. One of the most prominent nuclear compartments is the nucleolus. The nucleus and nucleolus share many structural and epigenetic features, but these features have specific functional significance. For instance, replication proceeds in replication foci, transcription in transcription “factories” or nucleoli, and splicing is regulated by proteins accumulated in nuclear speckles. Similarly, DNA repair events are associated with specific structural characteristics and occur in repair foci consisting of accumulated DNA repair-related proteins. Based on these observations, it is increasingly clear that changes in global genome organization and chromatin dynamics occur in parallel with functional changes in the genome. These structural characteristics contribute to the balance between genome stability and instability.
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Abbreviations
- ATM:
-
Ataxia telangiectasia mutated kinase
- ATR:
-
Serine/threonine kinase/ataxia telangiectasia/Rad3-related protein
- BER:
-
Base excision repair
- BrdU:
-
5-bromo-2′-deoxyuridine
- CAF1:
-
Chromatin assembly factor 1
- CD:
-
Chromodomain
- CDK2:
-
Cyclin-dependent kinase 2
- CK2:
-
Casein kinase 2
- CSD:
-
Chromoshadow domain
- DDR:
-
DNAdamage responses
- DFC:
-
Dense fibrillar components
- dn:
-
Double null
- DSB:
-
Doubles strand break
- FC:
-
Fibrillar center
- GC:
-
Granular components
- HDAC:
-
Histone deacetylases
- HP1:
-
Heterochormatin protein 1
- HR:
-
Homologous recombination
- NER:
-
Nucleotide excision repair
- NHEJ:
-
Non-homologous end joining
- NORs:
-
Nucleolar organizing regions
- PML:
-
Promyelocytic leukaemia bodies
- Rb:
-
Retinoblastoma gene
- snRNPs:
-
Small nuclear ribonucleoprotein particles
- SSB:
-
Single strand break
- TDP:
-
Time decision point
- TEM:
-
Transmission electron microscopy
- UBF:
-
Upstream binding factor
- wt:
-
Wild type
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Acknowledgements
This work was supported by the Ministry of Education, Youth, and Sports of the Czech Republic (research projects LC535, LC06027, ME 919, LD11020) and by the Academy of Sciences of the Czech Republic (projects AVOZ50040702 and AVOZ50040507). It was also supported by EU project COST TD09/05 and Marie Curie project PIRSES-GA-2010-269156-LCS. Some experiments were supported by the national COST-CZ project LD11020 and by Grant Agency of Czech Republic, project P302/10/1022. Many thanks to Soňa Legartová for technical support.
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Bártová, E., Stixová, L. (2013). Functional Consequences of Nuclear and Nucleolar Architecture. In: O'Day, D., Catalano, A. (eds) Proteins of the Nucleolus. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-5818-6_2
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