Replication fork rescue in mammalian mitochondria
Replication fork rescue in mammalian mitochondria
复制标题
哺乳动物线粒体中的复制叉救援
DOI:
10.1038/s41598-019-45244-6
复制
发表时间:
2019
影响因子:
4.6
通讯作者:
Pohjoismäki JLO
中科院分区:
文献类型:
--
作者:
Torregrosa-Muñumer R;Hangas A;Goffart S;Blei D;Zsurka G;Griffith J;Kunz WS;Pohjoismäki JLO
Replication stalling has been associated with the formation of pathological mitochondrial DNA (mtDNA) rearrangements. Yet, almost nothing is known about the fate of stalled replication intermediates in mitochondria. We show here that replication stalling in mitochondria leads to replication fork regression and mtDNA double-strand breaks. The resulting mtDNA fragments are normally degraded by a mechanism involving the mitochondrial exonuclease MGME1, and the loss of this enzyme results in accumulation of linear and recombining mtDNA species. Additionally, replication stress promotes the initiation of alternative replication origins as an apparent means of rescue by fork convergence. Besides demonstrating an interplay between two major mechanisms rescuing stalled replication forks – mtDNA degradation and homology-dependent repair – our data provide evidence that mitochondria employ similar mechanisms to cope with replication stress as known from other genetic systems.
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DOI:
10.1073/pnas.60.1.243
发表时间:
1968-01-01
影响因子:
11.1
作者:
DAVIS, RW;DAVIDSON, N
通讯作者:
DAVIDSON, N
影响因子:
--
作者:
R. Thresher;J. Griffith
通讯作者:
J. Griffith
影响因子:
16.6
作者:
Peeva V;Blei D;Trombly G;Corsi S;Szukszto MJ;Rebelo-Guiomar P;Gammage PA;Kudin AP;Becker C;Altmüller J;Minczuk M;Zsurka G;Kunz WS
通讯作者:
Kunz WS
影响因子:
14.9
作者:
Shi Y;Posse V;Zhu X;Hyvärinen AK;Jacobs HT;Falkenberg M;Gustafsson CM
通讯作者:
Gustafsson CM
影响因子:
7.2
作者:
Yeeles, Joseph T. P.;Poli, Jerome;Pasero, Philippe
通讯作者:
Pasero, Philippe