Bptf, a component of NURF chromatin-remodeling complex, is essential for maintaining the pool size and function of hematopoietic stem cells (HSCs). Genome-wide transcriptome profiling revealed that Bptf loss caused down-regulation of HSC-specific gene-expression programs, which included master transcription factors (such as Meis1, Pbx1, and Lmo2) known to be required for HSC maintenance and self-renewal. Bptf directly bound to the promoter of 'stemness' TF genes, potentiating their transcription and DNA accessibility. Overall design: To dissect the gene-regulatory role of Bptf in HSPCs, we sorted out phenotypically identical LSK cells from the bone marrow of Bptf conditional KO mice and littermate controls, followed by ACAT-seq and RNA-seq studies. We also performed H3K4me3 ChIP-seq using HPC7 cells, a murine HSPC-mimicking cell line.