Rejuvenation of ribosomal RNA gene repeats at the nuclear pore
Rejuvenation of ribosomal RNA gene repeats at the nuclear pore
复制标题
核孔核糖体 RNA 基因重复的复兴
DOI:
10.1007/s00294-019-01024-3
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发表时间:
2020
期刊:
影响因子:
2.5
通讯作者:
Chihiro Horigome and Takehiko Kobayashi
中科院分区:
文献类型:
--
作者:
Kitagawa Saho;Kusakabe Masayuki;Takahashi Daisuke;Narimiya Takumi;Nakabayashi Yu;Seki Masayuki;Horigome Chihiro;Harata Masahiko;Chihiro Horigome and Takehiko Kobayashi
The ribosomal RNA genes (rDNA) exist as tandem repeats in eukaryotes and are, therefore, highly unstable. Each rDNA unit includes a replication fork barrier site to avoid collisions between DNA replication forks and transcriptional machinery. However, because of this barrier, DNA double-strand breaks are induced at a relatively high frequency. If damage is repaired by the homologous recombination in rDNAs, it may result in frequent copy number changes and the production of extrachromosomal ribosomal DNA circles, both of which are closely linked to the regulation of lifespan. Here, we review recent progress in elucidating a multi-layered repair process of rDNA that occurs in the nucleolus, nucleoplasm and nuclear pores. Binding to nuclear pores appears to be the final strategy for repairing any remaining damage to the rDNA. Here, we propose the possible contribution of nuclear pores to the asymmetric distribution of damaged rDNA between mother and daughter cells as well as its possible impact on aging/rejuvenation.
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影响因子:
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通讯作者:
Greenberg RA
影响因子:
10.5
作者:
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Gasser SM
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10.5
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Kaeberlein, M;McVey, M;Guarente, L
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