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The fate of irreparable DNA double-strand breaks and eroded telomeres at the nuclear periphery

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Pages 158-161 | Received 27 Oct 2009, Accepted 09 Jan 2010, Published online: 01 Mar 2010

Figures & data

Figure 1 Model for two-step response to eroded telomeres. Initially, eroded telomeres are maintained in a pre-signaling state via Mps3-dependent tethering at the nuclear envelope (NE). This state promotes telomere addition by telomerase (i). Subsequently, persisting eroded telomeres relocalize to the nuclear pore complex (NPC), where homologous recombination is promoted, and they switch to a Mec1-dependent signaling state, leading to replicative senescence (ii). SPB, spindle pole body.

Figure 1 Model for two-step response to eroded telomeres. Initially, eroded telomeres are maintained in a pre-signaling state via Mps3-dependent tethering at the nuclear envelope (NE). This state promotes telomere addition by telomerase (i). Subsequently, persisting eroded telomeres relocalize to the nuclear pore complex (NPC), where homologous recombination is promoted, and they switch to a Mec1-dependent signaling state, leading to replicative senescence (ii). SPB, spindle pole body.