{Reference Type}: Journal Article
{Title}: Post-Integrational DNA Repair of HIV-1 Is Associated with Activation of the DNA-PK and ATM Cellular Protein Kinases and Phosphorylation of Their Targets.
{Author}: Anisenko AN;Nefedova AA;Kireev II;Gottikh MB;
{Journal}: Biochemistry (Mosc)
{Volume}: 89
{Issue}: 6
{Year}: 2024 Jun
{Factor}: 2.824
{DOI}: 10.1134/S0006297924060117
{Abstract}: Integration of the DNA copy of HIV-1 genome into the cellular genome results in series of damages, repair of which is critical for successful replication of the virus. We have previously demonstrated that the ATM and DNA-PK kinases, normally responsible for repairing double-strand breaks in the cellular DNA, are required to initiate the HIV-1 DNA postintegrational repair, even though integration does not result in DNA double-strand breaks. In this study, we analyzed changes in phosphorylation status of ATM (pSer1981), DNA-PK (pSer2056), and their related kinase ATR (pSer428), as well as their targets: Chk1 (pSer345), Chk2 (pThr68), H2AX (pSer139), and p53 (pSer15) during the HIV-1 DNA postintegrational repair. We have shown that ATM and DNA-PK, but not ATR, undergo autophosphorylation during postintegrational DNA repair and phosphorylate their target proteins Chk2 and H2AX. These data indicate common signaling mechanisms between the double-strand DNA break repair and postintegrational repair of HIV-1 DNA.