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The transcription factor C/EBPβ controls differentiation, proliferation, and functionality of many cell types, including innate immune cells. A detailed molecular understanding of how C/EBPβ directs alternative cell fates remains largely elusive. A multitude of signal-dependent post-translational modifications (PTMs) differentially affect the protean C/EBPβ functions. In this study we apply an assay that converts primary mouse B lymphoid progenitors into myeloid cells in order to answer the question how C/EBPβ regulates (trans-) differentiation and determines myeloid cell fate. We found that structural alterations and various C/EBPβ PTMs determine the outcome of trans-differentiation of lymphoid into myeloid cells, including different types of monocytes/macrophages, dendritic cells, and granulocytes. The ability of C/EBPβ to recruit chromatin remodeling complexes is required for the granulocytic trans-differentiation outcome. These novel findings reveal that PTMs and structural plasticity of C/EBPβ are adaptable modular properties that integrate and rewire epigenetic functions to direct differentiation to diverse innate immune system cells, which are crucial for the organism survival.

Original publication

DOI

10.1371/journal.pone.0065169

Type

Journal article

Journal

PLoS One

Publication Date

2013

Volume

8

Keywords

Amino Acid Substitution, Animals, B-Lymphocytes, CCAAT-Enhancer-Binding Protein-beta, Cell Transdifferentiation, Cells, Cultured, Immunity, Innate, Mice, Inbred C57BL, Mice, Knockout, Myeloid Cells, Protein Processing, Post-Translational, Protein Structure, Tertiary, Transcriptional Activation, Transcriptome