FBXO11-mediated proteolysis of BAHD1 relieves PRC2-dependent transcriptional repression in erythropoiesis

Peng Xu, Daniel C. Scott, Beisi Xu, Yu Yao, Ruopeng Feng, Li Cheng, Kalin Mayberry, Yong Dong Wang, Wenjian Bi, Lance E. Palmer, Moeko T. King, Hong Wang, Yuxin Li, Yiping Fan, Arno F. Alpi, Chunliang Li, Junmin Peng, James Papizan, Shondra M. Pruett-Miller, Ria SpallekFlorian Bassermann, Yong Cheng, Brenda A. Schulman, Mitchell J. Weiss

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The histone mark H3K27me3 and its reader/writer polycomb repressive complex 2 (PRC2) mediate widespread transcriptional repression in stem and progenitor cells. Mechanisms that regulate this activity are critical for hematopoietic development but are poorly understood. Here we show that the E3 ubiquitin ligase F-box only protein 11 (FBXO11) relieves PRC2-mediated repression during erythroid maturation by targeting its newly identified substrate bromo adjacent homology domain–containing 1 (BAHD1), an H3K27me3 reader that recruits transcriptional corepressors. Erythroblasts lacking FBXO11 are developmentally delayed, with reduced expression of maturation-associated genes, most of which harbor bivalent histone marks at their promoters. In FBXO112/2 erythroblasts, these gene promoters bind BAHD1 and fail to recruit the erythroid transcription factor GATA1. The BAHD1 complex interacts physically with PRC2, and depletion of either component restores FBXO11-deficient erythroid gene expression. Our studies identify BAHD1 as a novel effector of PRC2-mediated repression and reveal how a single E3 ubiquitin ligase eliminates PRC2 repression at many developmentally poised bivalent genes during erythropoiesis.

Original languageEnglish
Pages (from-to)155-167
Number of pages13
JournalBlood
Volume137
Issue number2
DOIs
Publication statusPublished - 14 Jan 2021

ASJC Scopus subject areas

  • Biochemistry
  • Immunology
  • Hematology
  • Cell Biology

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