期刊
DEVELOPMENTAL CELL
卷 42, 期 1, 页码 82-+出版社
CELL PRESS
DOI: 10.1016/j.devcel.2017.06.010
关键词
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资金
- Worldwide Cancer Research [10-0908]
- Wellcome Trust [107056/Z/15/Z]
- Gurdon Institute (Cancer Research UK) [C6946/A14492]
- Gurdon Institute (Wellcome Trust) [092096]
- Francis Crick Institute (Cancer Research UK) [FC001-157]
- Francis Crick Institute (UK Medical Research Council) [FC001-157]
- Francis Crick Institute (Wellcome Trust) [FC001-157]
- MRC [MC_U117597140] Funding Source: UKRI
- Medical Research Council [MC_U117597140] Funding Source: researchfish
- The Francis Crick Institute [10157] Funding Source: researchfish
- Wellcome Trust [107056/Z/15/Z] Funding Source: researchfish
- Worldwide Cancer Research [10-0908] Funding Source: researchfish
- Wellcome Trust [107056/Z/15/Z] Funding Source: Wellcome Trust
The early cell divisions of many metazoan embryos are rapid and occur in the near absence of transcription. At the mid-blastula transition (MBT), the cell cycle elongates and several processes become established including the onset of bulk transcription and cell-cycle checkpoints. How these events are timed and coordinated is poorly understood. Here we show in Xenopus laevis that developmental activation of the checkpoint kinase Chk1 at the MBT results in the SCF beta-TRCP - dependent degradation of a limiting replication initiation factor Drf1. Inhibition of Drf1 is the primarymechanism by which Chk1 blocks cell-cycle progression in the early embryo and is an essential function of Chk1 at the blastula-to-gastrula stage of development. This study defines the down-regulation of Drf1 as an important mechanism to coordinate the lengthening of the cell cycle and subsequent developmental processes.
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