Stag2-dependent chromatin remodeling enforces the erythroid-specific Gata1 cistrome.
- Open access
Loss of Stag2 causes GATA1 to reprogram its binding from erythroid to megakaryocyte targets, disrupting normal blood cell development in MDS models.
- Why it matters: Understanding how chromatin accessibility influences transcription factor targeting is crucial for deciphering mechanisms underlying blood disorders like MDS, where lineage differentiation is impaired.
- What they did: The study used chromatin accessibility assays, RNA sequencing, and GATA1 occupancy analysis in Stag2-deficient mice and human MDS samples, focusing on erythroid and megakaryocyte differentiation.
- The result: Findings show that Stag2 loss alters chromatin accessibility, leading GATA1 to shift its focus from erythroid to megakaryocyte genes, impairing erythropoiesis and promoting abnormal megakaryocyte production, which can be partially reversed by Fli1 knockdown.