Figure 4. 4-HNE and 4-ONE adduction of GRP78 results in a concentration-dependent decrease in ATP hydrolysis.
Treatment of GRP78 with 4-HNE (open bars) or 4-ONE (closed bars) reveals a corresponding decrease in ATPase activity. Estimated IC50 values were calculated revealing a Ki of 51.8μM for 4-HNE and a Ki of 43.9μM for 4-ONE.