Regulated Formation of Extrachromosomal Circular DNA Molecules during Development in Xenopus laevis
Regulated Formation of Extrachromosomal Circular DNA Molecules during Development in Xenopus laevis
复制标题
非洲爪蟾发育过程中染色体外环状 DNA 分子的形成调控
DOI:
10.1128/mcb.19.10.6682
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发表时间:
1999
影响因子:
5.3
通讯作者:
M. Méchali
中科院分区:
文献类型:
--
作者:
Sarit Cohen;S. Menut;M. Méchali
ABSTRACT Extrachromosomal circular DNA molecules of chromosomal origin have been detected in many organisms and are thought to reflect genomic plasticity in eukaryotic cells. Here we report a developmentally regulated formation of extrachromosomal circular DNA that occurs de novo in preblastula Xenopus embryos. This specific DNA population is not detected in the male or female germ cells and is dramatically reduced in later developmental stages and in adult tissues. The activity responsible for the de novo production of extrachromosomal circles is maternally inherited, is stored in the unfertilized egg, and requires genomic DNA as a template. The formation of circular molecules does not require genomic DNA replication but both processes can occur simultaneously in the early development. The production of extrachromosomal circular DNA does not proceed at random since multimers of the tandemly repeated sequence satellite 1 were over-represented in the circle population, while other sequences (such as ribosomal DNA and JCC31 repeated sequence) were not detected. This phenomenon reveals an unexpected plasticity of the embryonic genome which is restricted to the early developmental stage.
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DOI:
10.1002/j.1460-2075.1993.tb05628.x
发表时间:
1993
期刊:
The EMBO journal
影响因子:
--
作者:
Pont-Kingdon,G;Dawson,RJ;Carroll,D
通讯作者:
Carroll,D
DOI:
10.1242/dev.124.16.3185
发表时间:
1997
期刊:
Development (Cambridge, England)
影响因子:
--
作者:
Stack,JH;Newport,JW
通讯作者:
Newport,JW
DOI:
10.1073/pnas.79.18.5572
发表时间:
1982
影响因子:
11.1
作者:
Chambers,JC;Watanabe,S;Taylor,JH
通讯作者:
Taylor,JH
影响因子:
5.6
作者:
Lam,BS;Carroll,D
通讯作者:
Carroll,D
影响因子:
11.2
作者:
Geoffrey M. Wahl
通讯作者:
Geoffrey M. Wahl