Figure 7. Increasing phosphatase activity in presence of nickel and Liprin-α4.
The activity of RPTP-LAR remained at a basal activity level in the control and in Liprin-α4 knock-down line 323. In the presence of nickel, Liprin-α4 binds to the second phosphatase domain (D2) of RPTP-LAR. By reorganization of RPTP-LAR, the first phosphatase domain (D1) might undergo conformational arrangements and become more open for its phosphate substrates.