The shRNA and scrambled control plasmids were from Sigma-Aldrich. The myc tagged murine WT IPMK, IPMK K129A, IPMK K129A/S235A and IPMK ΔNLS constructs were cloned to pCDH-EF1-MCS-T2A-copGFP vector (System Biosciences). The myc tagged human WT IPMK, IPMK K146A, IPMK ΔNLS and myc tagged GFP constructs were cloned to pCDH-EF1-MCS-T2A-copGFP vector (System Biosciences). The GFP tagged WT IPMK and IPMKΔNLS were cloned to pLVX-AcGFP1-N1 vector (Clontech). The flag tagged pVHL and HIF-1α genes were cloned to pLVX-AcGFP1-N1 vector (Clontech). The GST tagged GFP and PHD2 were cloned to pCDH-EF1-MCS-T2A-copGFP vector (System Biosciences). Lenti virus were generated by transfection of lenviviral vector together with pMD2.G and psPAX2 to HEK293T/17 cells44 (link).