1. Menin “reads” H3K79me2 mark in a nucleosomal context
- Author
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Lin, Jianwei, Wu, Yiping, Tian, Gaofei, Yu, Daqi, Yang, Eunjeong, Lam, Wai Hei, Liu, Zheng, Jing, Yihang, Dang, Shangyu, Bao, Xiucong, Wong, Jason Wing Hon, Zhai, Yuanliang, Li, Xiang David, Lin, Jianwei, Wu, Yiping, Tian, Gaofei, Yu, Daqi, Yang, Eunjeong, Lam, Wai Hei, Liu, Zheng, Jing, Yihang, Dang, Shangyu, Bao, Xiucong, Wong, Jason Wing Hon, Zhai, Yuanliang, and Li, Xiang David
- Abstract
Methylation of histone H3 lysine-79 (H3K79) is an epigenetic mark for gene regulation in development, cellular differentiation, and disease progression. However, how this histone mark is translated into downstream effects remains poorly understood owing to a lack of knowledge about its readers. We developed a nucleosome-based photoaffinity probe to capture proteins that recognize H3K79 dimethylation (H3K79me2) in a nucleosomal context. In combination with a quantitative proteomics approach, this probe identified menin as a H3K79me2 reader. A cryo-electron microscopy structure of menin bound to an H3K79me2 nucleosome revealed that menin engages with the nucleosome using its fingers and palm domains and recognizes the methylation mark through a p-cation interaction. In cells, menin is selectively associated with H3K79me2 on chromatin, particularly in gene bodies. © 2023 American Association for the Advancement of Science. All rights reserved.
- Published
- 2023