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Published on: June 12, 2018
ZFP560 facilitates KAP1-dependent chromatin repression to regulate exit from totipotency
Qingsheng Han1, Lichao Wang1, Chang Liu1
1School of Medicine, Nankai University, Tianjin 300071, China.
Summary
Zinc finger protein 560 (ZFP560) regulates early embryonic development by maintaining heterochromatin structure. This KRAB-ZFP transcription factor is crucial for the exit from totipotency in mice.
Area of Science:
- Epigenetics
- Developmental Biology
- Mammalian Embryogenesis
Background:
- KRAB zinc finger proteins (KRAB-ZFPs) are key regulators of gene expression and epigenetic silencing in mammals.
- They play a critical role in silencing transposable elements (TEs) during embryonic development.
- The specific roles of early KRAB-ZFP effectors in embryonic development and cell state transitions are not well understood.
Purpose of the Study:
- To investigate the role of zinc finger protein 560 (ZFP560) in early embryonic development and cell state transitions.
- To elucidate the mechanism by which ZFP560 regulates the exit from totipotency.
Main Methods:
- Identification of ZFP560 as a regulator of early embryonic development in mice.
- Analysis of ZFP560's role in heterochromatin formation and KAP1 recruitment.
- Assessment of ZFP560's impact on totipotency exit, MERVL expression, and 2-cell (2C) transcription factor activity.
Main Results:
- ZFP560 is essential for safeguarding heterochromatin structure by recruiting KAP1, facilitating the exit from totipotency.
- ZFP560 deficiency disrupts heterochromatin formation, halting the transition from totipotency to pluripotency.
- ZFP560 overexpression promotes exit from the MERVL-positive state and suppresses 2C transcription factors by recruiting KAP1, reducing chromatin accessibility.
Conclusions:
- ZFP560 is a highly expressed, 2C-specific KRAB-ZFP transcription factor.
- ZFP560 acts as a mediator facilitating the exit from totipotency during early embryonic development.
- These findings offer insights into the epigenetic regulation governing early embryonic development and cell state transitions.
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