Figure 5. Multiple regions of ENL mutants are required for condensate formation and function.
(A) Schematic showing different ENL variants and their ability to form puncta under overexpression (O/E) and form puncta and exhibit gain-of-function (GOF) on chromatin at endogenous levels.
(B-D) Representative images (B) and fraction of in-puncta fluorescence intensity quantification (C and D) of HEK293 cells transiently transfected with indicated mCherry-ENL variants. B, all cells shown had similar mCherry-ENL intensities. C and D, each dot indicates one cell (n > 20).
(E and J) Flag IF staining in HEK293 cells expressing endogenous levels of indicated Flag-ENL. J, the yellow arrows show smaller nuclear puncta formed by T2(ΔIDR2).
(F, G, K, L) Percentage of nuclei with and without Flag-ENL puncta (F and K) and the number of Flag-ENL puncta in each nucleus (G and L) in HEK293 cells. Each dot indicates one cell (n at the range of 30~60). Center lines indicate median and box limits are set to the 25th and 75th percentiles. (H, I, M, N) ChIP-qPCR analysis of Flag-ENL occupancy at HOXA locus (H and M) and mRNA expression (normalized to GAPDH) of HOXA genes (I and N) in HEK293 cells with endogenous levels of indicated Flag-ENL. Data shown are Mean ± S.D..
F and K, Chi-square test. G-I, L-N: Two-tailed unpaired Student’s t-test. *** P < 0.001, ** P < 0.01, *P < 0.05.
See also Figure S5.