Figure 3. Interfaces among MLL3SET, RBBP5AS-ABM and ASH2LSPRY.
a, Detailed view of the ASH2LSPRY–RBBP5ABM interface. b, The interface between MLL3SET and RBBP5AS. c, MLL3 Arg4806 forms an extensive salt-bridge and hydrogen-bonding network with ASH2L and RBBP5. d, Mutations of the conserved arginine in MLL proteins disrupt interactions with RBBP5–ASH2L, as shown by the GST pull-down assay in 300 mM NaCl buffer. e, Arginine mutations impair the HKMT activities of MLL family proteins. Activities of all complexes are normalized to the activity of wild-type MLL1–WDR5–RBBP5–ASH2L, and shown as mean ± s.d. (n = 3).