Distinct stimulatory mechanisms regulate the catalytic activity of Polycomb Repressive Complex 2 (PRC2)
Distinct stimulatory mechanisms regulate the catalytic activity of Polycomb Repressive Complex 2 (PRC2)
Abstract The maintenance of gene expression patterns during metazoan development is carried out, in part, by the actions of the Polycomb Repressive Complex 2 (PRC2). PRC2 catalyzes mono-, di-and trimethylation of histone H3 at lysine 27 (H3K27), with H3K27me2/3 being strongly associated with silenced genes. We demonstrate that EZH1 and EZH2, the two mutually exclusive catalytic subunits of PRC2, are differentially activated by various mechanisms. While both PRC2-EZH1 and PRC2-EZH2 are able to catalyze monomethylation, only PRC2-EZH2 is strongly activated by allosteric modulators and specific chromatin substrates to catalyze di-and trimethylation of H3K27. However, we also show that a PRC2 associated protein, AEBP2, can stimulate the activity of both complexes through a mechanism independent of and additive to allosteric activation. These results have strong implications regarding the cellular requirements for and accompanying adjustments in PRC2 activity, given the difference in the expression of EZH1 and EZH2 upon cellular differentiation.
Lee Chul-Hwan、Wang Miao、Dobenecker Marc-Werner、Reinberg Danny、Grau Daniel、Holder Marlene、Zhang Jenny、Saldana-Meyer Ricardo、Armache Karim-Jean、Ganai Rais Ahmad
Howard Hughes Medical Institute||Department of Biochemistry and Molecular Pharmacology, New York University School of MedicineDepartment of Biochemistry and Molecular Pharmacology, New York University School of Medicine||Skirball Institute of Biomolecular Medicine, New York University School of MedicineLaboratory of Immune Cell Epigenetics and Signaling, The Rockefeller UniversityHoward Hughes Medical Institute||Department of Biochemistry and Molecular Pharmacology, New York University School of MedicineDepartment of Biochemistry and Molecular Pharmacology, New York University School of Medicine||Skirball Institute of Biomolecular Medicine, New York University School of MedicineDepartment of Biochemistry and Molecular Pharmacology, New York University School of Medicine||Skirball Institute of Biomolecular Medicine, New York University School of MedicineDepartment of Biochemistry and Molecular Pharmacology, New York University School of Medicine||Skirball Institute of Biomolecular Medicine, New York University School of MedicineHoward Hughes Medical Institute||Department of Biochemistry and Molecular Pharmacology, New York University School of MedicineDepartment of Biochemistry and Molecular Pharmacology, New York University School of Medicine||Skirball Institute of Biomolecular Medicine, New York University School of MedicineHoward Hughes Medical Institute||Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine
分子生物学遗传学
Lee Chul-Hwan,Wang Miao,Dobenecker Marc-Werner,Reinberg Danny,Grau Daniel,Holder Marlene,Zhang Jenny,Saldana-Meyer Ricardo,Armache Karim-Jean,Ganai Rais Ahmad.Distinct stimulatory mechanisms regulate the catalytic activity of Polycomb Repressive Complex 2 (PRC2)[EB/OL].(2025-03-28)[2025-04-30].https://www.biorxiv.org/content/10.1101/210542.点此复制
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