Mbd2-CP2c loop drives adult-type globin gene expression and definitive erythropoiesis
- Title
- Mbd2-CP2c loop drives adult-type globin gene expression and definitive erythropoiesis
- Author
- 백은정
- Keywords
- TRANSCRIPTION FACTOR CP2; ERYTHROID CELL-PROTEINS; IN-VITRO; TERMINAL DIFFERENTIATION; REMODELING COMPLEX; REPRESSOR COMPLEX; MI-2/NURD COMPLEX; MECP1 COMPLEX; FACTOR LSF; BINDING
- Issue Date
- 2018-03
- Publisher
- OXFORD UNIV PRESS
- Citation
- NUCLEIC ACIDS RESEARCH, v. 46, no. 10, page. 4933-4949
- Abstract
- During hematopoiesis, red blood cells originate from the hematopoietic stem cell reservoir. Although the regulation of erythropoiesis and globin expression has been intensively investigated, the underlining mechanisms are not fully understood, including the interplay between transcription factors and epigenetic factors. Here, we uncover that the Mbd2-free NuRD chromatin remodeling complex potentiates erythroid differentiation of proerythroblasts via managing functions of the CP2c complexes. We found that both Mbd2 and Mbd3 expression is downregulated during differentiation of MEL cells in vitro and in normal erythropoiesis in mouse bone marrow, and Mbd2 downregulation is crucial for erythropoiesis. In uninduced MEL cells, the Mbd2-NuRD complex is recruited to the promoter via Gata1/Fog1, and, via direct binding through p66 alpha, it acts as a transcriptional inhibitor of the CP2c complexes, preventing their DNA binding and promoting degradation of the CP2c family proteins to suppress globin gene expression. Conversely, during erythropoiesis in vitro and in vivo, the Mbd2-free NuRD does not dissociate from the chromatin and acts as a transcriptional coactivator aiding the recruitment of the CP2c complexes to chromatin, and thereby leading to the induction of the active hemoglobin synthesis and erythroid differentiation. Our study highlights the regulation of erythroid differentiation by the Mbd2-CP2c loop.
- URI
- https://academic.oup.com/nar/article/46/10/4933/4934131https://repository.hanyang.ac.kr/handle/20.500.11754/117922
- ISSN
- 0305-1048; 1362-4962
- DOI
- 10.1093/nar/gky193
- Appears in Collections:
- COLLEGE OF MEDICINE[S](의과대학) > MEDICINE(의학과) > Articles
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