In situ chromatin interactomics using a chemical bait and trap approach

被引:59
作者
Burton, Antony J. [1 ]
Haugbro, Michael [1 ]
Gates, Leah A. [2 ]
Bagert, John D. [1 ]
Allis, C. David [2 ]
Muir, Tom W. [1 ]
机构
[1] Princeton Univ, Dept Chem, Frick Chem Lab, Princeton, NJ 08544 USA
[2] Rockefeller Univ, Lab Chromatin Biol & Epigenet, 1230 York Ave, New York, NY 10021 USA
关键词
PROTEIN-PROTEIN INTERACTIONS; PHD FINGER; LYSINE-4; METHYLATION; PROTEOMICS APPROACH; HISTONE H3K4ME3; SPLIT INTEIN; BINDING; IDENTIFICATION; PRC2; GENE;
D O I
10.1038/s41557-020-0474-8
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Elucidating the physiological binding partners of histone post-translational modifications (hPTMs) is key to understanding fundamental epigenetic regulatory pathways. Determining such interactomes will enable the study of how perturbations of these interactions affect disease. Here we use a synthetic biology approach to set a series of hPTM-controlled photo-affinity traps in native chromatin. Using quantitative proteomics, the local interactomes of these chemically customized chromatin landscapes are determined. We show that the approach captures transiently interacting factors such as methyltransferases and demethylases, as well as previously reported and novel hPTM reader proteins. We also apply this in situ proteomics approach to a recently disclosed cancer-associated histone mutation, H3K4M, revealing a number of perturbed interactions with the mutated tail. Collectively our studies demonstrate that modifying and interrogating native chromatin with chemical precision is a powerful tool for exploring epigenetic regulation and dysregulation at the molecular level. Proteins that interact with histone post-translational modifications have now been identified using an approach based on split-intein mediated histone semisynthesis. Histone modifications and disease-relevant mutations were installed into native chromatin with an adjacent photocross-linker to enable in situ cross-linking. This strategy enabled the determination of chromatin-relevant interactomes and represents a powerful tool for exploring epigenetic regulation and dysregulation at the molecular level.
引用
收藏
页码:520 / +
页数:9
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