Extended Data Fig. 5: Acute depletion of BCL11A leads to rapid binding of NF-Y.

a, Schematic diagram of primary human CD34⁺ differentiation and acute depletion of BCL11A using CRISPR/Cas9. b, Pairwise correlation of PRO-seq experiments. All the experiments in each time point showed high degree of correlation, indicating very minor transcriptional fluctuation upon BCL11A depletion. c, Average PRO-seq signal at -200 to +600 bp relative to TSS exhibited promoter pausing of PolII. d, Quantification of PRO-seq reads on HBG1/2 and HBB genes after 32 or 72 hrs of BCL11A acute depletion. The y-axis shows Reads Per Million (RPM) for HBG1+HBG2 or HBB. The result is shown as mean (SD) of two biologically independent samples (independent cell cultures and CRISPR KO). e, CUT&RUN of TBP in CD34⁺ cells undergoing erythroid differentiation after 32 or 72 hrs of BCL11A acute depletion. The result shown is representative of two biological replicates. Quantification of KO/Ctrl and the corresponding p-values are reported by MAnorm. f, Western blot for BCL11A and NFYA in adult primary human CD34⁺ derived erythroid cells upon KO of NFYA, BCL11A or both (cropped). g, RT-qPCR analysis of γ-globin expression in adult primary human CD34⁺ derived erythroid cells upon KO of NFYA, BCL11A or both. Knockout of NFYA after 72 hours decreases γ-globin expression. The result is shown as mean (SD) of three technical replicates. h, Chromosome Conformation Capture qPCR in adult primary human CD34⁺ derived erythroid cells, comparing BCL11A KO and BCL11A/NF-Y double KO. EcoRI fragment encompassing HS2-4 of the LCR was used as anchor point to evaluate LCR-globin interaction. The result is shown as mean (SD) of three technical replicates.

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