Initiation of Parental Genome Reprogramming in Fertilized Oocyte by Splicing Kinase SRPK1-Catalyzed Protamine Phosphorylation
- Authors
- Gou, Lan-Tao; Lim, Do-Hwan; Ma, Wubin; Aubol, Brandon E.; Hao, Yajing; Wang, Xin; Zhao, Jun; Liang, Zhengyu; Shao, Changwei; Zhang, Xuan; Meng, Fan; Li, Hairi; Zhang, Xiaorong; Xu, Ruiming; Li, Dangsheng; Rosenfeld, Michael G.; Mellon, Pamela L.; Adams, Joseph A.; Liu, Mo-Fang; Fu, Xiang-Dong
- Issue Date
- Mar-2020
- Publisher
- CELL PRESS
- Citation
- CELL, v.180, no.6, pp.1212 - +
- Journal Title
- CELL
- Volume
- 180
- Number
- 6
- Start Page
- 1212
- End Page
- +
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/40309
- DOI
- 10.1016/j.cell.2020.02.020
- ISSN
- 0092-8674
- Abstract
- The paternal genome undergoes a massive exchange of histone with protamine for compaction into sperm during spermiogenesis. Upon fertilization, this process is potently reversed, which is essential for parental genome reprogramming and subsequent activation; however, it remains poorly understood how this fundamental process is initiated and regulated. Here, we report that the previously characterized splicing kinase SRPK1 initiates this life-beginning event by catalyzing site-specific phosphorylation of protamine, thereby triggering protamine-to-histone exchange in the fertilized oocyte. Interestingly, protamine undergoes a DNA-dependent phase transition to gel-like condensates and SRPK1-mediated phosphorylation likely helps open up such structures to enhance protamine dismissal by nucleoplasmin (NPM2) and enable the recruitment of HIRA for H3.3 deposition. Remarkably, genome-wide assay for transposase-accessible chromatin sequencing (ATAC-seq) analysis reveals that selective chromatin accessibility in both sperm and MII oocytes is largely erased in early pronuclei in a protamine phosphorylation-dependent manner, suggesting that SRPK1-catalyzed phosphorylation initiates a highly synchronized reorganization program in both parental genomes.
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Collections - College of Natural Sciences > School of Systems and Biomedical Science > 1. Journal Articles
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