.png){kind=icon}
.png){kind=icon}
Return
Mechanistic insight into anaphase bridge signaling to the abscission checkpoint
.png){kind=icon}
OA
AI
DOI：10.1038/s44318-025-00453-w.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
During cytokinesis in human cells, a failure to resolve persistent DNA bridges that span the cell-division plane maintains the Aurora B-dependent abscission checkpoint in an active state. However, the molecular mechanism by which unresolved sister-chromatid bridging signals to this checkpoint is poorly defined. Here, we define an essential role for the Bloom's syndrome helicase, BLM, in signaling to the abscission-checkpoint machinery in response to replication stress through the conversion of dsDNA bridges into RPA-coated ssDNA. RPA then promotes ATR-CHK1 signaling to Aurora B, utilizing a kinase cascade shared with the S-phase checkpoint. BLM-deficient cells ultimately abandon cytokinesis in response to replication stress, which promotes binucleation and hence aneuploidy. Considering that aneuploidy is a hallmark of cancer, we propose that this role for BLM in cytokinesis is a plausible reason for cancer predisposition in Bloom's syndrome individuals. Consistent with this, BLM deficiency promotes anchorage-independent growth of non-cancer cells.
Keywords:
ATR-CHK1 Signaling
Chromosome Missegregation
Aneuploidy
Cytokinesis Failure
Anchorage Independent Growth
Journal
IF:
8.3
Papers:
1.3W
Citations:
6.3W
Organization
No organization information available
Cited Papers