TP53 and Miyoshi myopathy: To test the effect of dual defects of NEK2 and TP53 on MM, we overexpressed NEK2 in H929 cells (H929‐NEK2 OE) and H929‐TP53KO cells (H929‐TP53KO/NEK2 OE), then performed functional assays in H929‐Ctrl, H929‐NEK2 OE, H929‐TP53KO, and H929‐TP53KO/NEK2 OE cells after determination of TP53 and NEK2 mRNA expression and protein levels (Figure S4A,B, Supporting Information).