Arginine methylation of the p30 C/EBPα oncoprotein regulates progenitor proliferation and myeloid differentiation.

ABSTRACT: The transcription factor CCAAT enhancer binding protein alpha (C/EBPα) is a master regulator of myelopoiesis. CEBPA encodes a long (p42) and a truncated (p30) protein isoform from a single mRNA. Mutations that abnormally enhance expression of p30 are associated with acute myelogenous leukemia (AML). We show by mutational analysis that three highly conserved arginine residues in the p30 C/EBPα N-terminus, previously found to be methylated, are involved in myeloid lineage commitment, progenitor proliferation, and differentiation. The conservative amino acid substitution with lysine that retains the amino acid side chain charge enhanced progenitor proliferation, while a non-conservative substitution with uncharged side chains (alanine, leucine) impaired proliferation and enhanced granu

SUBMITTER: Nguyen LT 

PROVIDER: S-EPMC11565546 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature