To further explore the biological functions of SMYD3 in human cancer, we performed liquid chromatography tandem-mass spectrometry (LC-MS/MS) analysis of AKT1 protein and identified that lysines 14, 30 and 39 (Lys 14, Lys 30 and Lys 39) in the PH domain of AKT1 were possibly methylated by SMYD3 (Figure 1B-1C and Supplementary Figures S4, S5 and S6). This evidence concerns the gene AKT1 and cancer.