Direct binding of pRb/E2F-2 to GATA-1 regulates maturation and terminal cell division during erythropoiesis

How cell proliferation subsides as cells terminally differentiate remains largely enigmatic, although this phenomenon is central to the existence of multicellular organisms. Here, we show that GATA-1, the master transcription factor of erythropoiesis, forms a tricomplex with the retinoblastoma prote...

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Veröffentlicht in:PLoS biology 2009-06, Vol.7 (6), p.e1000123-e1000123
Hauptverfasser: Kadri, Zahra, Shimizu, Ritsuko, Ohneda, Osamu, Maouche-Chretien, Leila, Gisselbrecht, Sylvie, Yamamoto, Masayuki, Romeo, Paul-Henri, Leboulch, Philippe, Chretien, Stany
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creator Kadri, Zahra
Shimizu, Ritsuko
Ohneda, Osamu
Maouche-Chretien, Leila
Gisselbrecht, Sylvie
Yamamoto, Masayuki
Romeo, Paul-Henri
Leboulch, Philippe
Chretien, Stany
description How cell proliferation subsides as cells terminally differentiate remains largely enigmatic, although this phenomenon is central to the existence of multicellular organisms. Here, we show that GATA-1, the master transcription factor of erythropoiesis, forms a tricomplex with the retinoblastoma protein (pRb) and E2F-2. This interaction requires a LXCXE motif that is evolutionary conserved among GATA-1 orthologs yet absent from the other GATA family members. GATA-1/pRb/E2F-2 complex formation stalls cell proliferation and steers erythroid precursors towards terminal differentiation. This process can be disrupted in vitro by FOG-1, which displaces pRb/E2F-2 from GATA-1. A GATA-1 mutant unable to bind pRb fails to inhibit cell proliferation and results in mouse embryonic lethality by anemia. These findings clarify the previously suspected cell-autonomous role of pRb during erythropoiesis and may provide a unifying molecular mechanism for several mouse phenotypes and human diseases associated with GATA-1 mutations.
doi_str_mv 10.1371/journal.pbio.1000123
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subjects Amino Acid Motifs
Amino Acid Sequence
Animals
Biochemistry
Biochemistry, Molecular Biology
Cell Biology/Cell Growth and Division
Cell Biology/Developmental Molecular Mechanisms
Cell Biology/Nuclear Structure and Function
Cell Division
Cell Proliferation
Cellular control mechanisms
E2F2 Transcription Factor
E2F2 Transcription Factor - metabolism
Erythroid Cells
Erythroid Cells - cytology
Erythroid Cells - metabolism
Erythropoiesis
Experiments
GATA1 Transcription Factor
GATA1 Transcription Factor - chemistry
GATA1 Transcription Factor - deficiency
GATA1 Transcription Factor - metabolism
Humans
Life Sciences
Mice
Molecular Biology
Molecular Sequence Data
Mutation
NIH 3T3 Cells
Nuclear Proteins
Nuclear Proteins - metabolism
Observations
Protein Binding
Proteins
Retinoblastoma Protein
Retinoblastoma Protein - deficiency
Retinoblastoma Protein - metabolism
Rodents
Transcription Factors
Transcription Factors - metabolism
title Direct binding of pRb/E2F-2 to GATA-1 regulates maturation and terminal cell division during erythropoiesis
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