Cells protect chromosome-microtubule attachments, independent of biorientation, using an Astrin-PP1 and CyclinB-CDK1 feedback loop
Cells protect chromosome-microtubule attachments, independent of biorientation, using an Astrin-PP1 and CyclinB-CDK1 feedback loop
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细胞使用 Astrin-PP1 和 CyclinB-CDK1 反馈环路保护染色体微管附着,与生物方向无关
DOI:
10.1101/2020.12.24.424312
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Conti D
中科院分区:
文献类型:
--
作者:
Conti D
Defects in chromosome-microtubule attachment can cause chromosomal instability, associated with infertility and aggressive cancers. Chromosome-microtubule attachment is mediated by a large macromolecular structure, the kinetochore. Kinetochore pairs are bioriented and pulled by microtubules from opposing spindle poles to ensure the equal segregation of chromosomes. Kinetochore-microtubule attachments lacking opposing-pull are detached by Aurora-B/Ipl1; yet, how mono-oriented attachments that are a prerequisite for biorientation, but lacking opposing-pull are spared is unclear. Using an RNAi-mediated screen, we uncover a unique role for the Astrin-SKAP complex in protecting mono-oriented attachments. We provide the first evidence for how a microtubule-end associated protein senses outer-kinetochore changes specific to end-on attachments and assembles into an outer kinetochore crescent to stabilise mature attachments. We find that Astrin-PP1 and Cyclin-B-CDK1 activities counteract each other to preserve mono-oriented attachments. Thus, cells are not only surveying chromosome-microtubule attachment errors, but they are also actively sensing and stabilising mature attachments independent of biorientation.
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DOI:
10.1083/jcb.201710094
发表时间:
2018-08-06
期刊:
The Journal of cell biology
影响因子:
--
作者:
Sikirzhytski V;Renda F;Tikhonenko I;Magidson V;McEwen BF;Khodjakov A
通讯作者:
Khodjakov A
DOI:
10.1083/jcb.201804166
发表时间:
2018-09-03
期刊:
The Journal of cell biology
影响因子:
--
作者:
Zulkipli I;Clark J;Hart M;Shrestha RL;Gul P;Dang D;Kasichiwin T;Kujawiak I;Sastry N;Draviam VM
通讯作者:
Draviam VM
影响因子:
9.2
作者:
Shrestha, Roshan L.;Draviam, Viji M.
通讯作者:
Draviam, Viji M.
影响因子:
7.7
作者:
Edelmaier, Christopher;Lamson, Adam R.;Betterton, Meredith D.
通讯作者:
Betterton, Meredith D.
影响因子:
1.6
作者:
ROOS, UP
通讯作者:
ROOS, UP