Figure 3.
Mutation analysis of β/SMMHC for the interaction with the Runt domain. (A) Identification of the second binding domain in β/SMMHC. GST-tagged Runt domain (GST-RD[25-190]) was mixed with various deletion constructs of β/SMMHC, and GST pull-down experiment was performed. Lanes 1 to 12 indicate 10% of the input of in vitro– translated β/SMMHC or its derivatives; lanes 13 to 24, control pull-down experiment with GST alone; and lanes 25 to 36, GST pull-down experiment using GST-RD(25-190). (B) The schematic diagram of β/SMMHC-derived constructs and the result of the GST pull-down experiments. The binding activities of each construct are listed to the right. X marks in panel B indicate mutations.