PMID- 32539222 OWN - NLM STAT- MEDLINE DCOM- 20210301 LR - 20210301 IS - 1530-6860 (Electronic) IS - 0892-6638 (Linking) VI - 34 IP - 8 DP - 2020 Aug TI - Src-mediated phosphorylation of GAPDH regulates its nuclear localization and cellular response to DNA damage. PG - 10443-10461 LID - 10.1096/fj.201902904RR [doi] AB - Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is a key enzyme involved in energy metabolism. Recently, GAPDH has been suggested to have extraglycolytic functions in DNA repair, but the underlying mechanism for the GAPDH response to DNA damage remains unclear. Here, we demonstrate that the tyrosine kinase Src is activated under DNA damage stress and phosphorylates GAPDH at Tyr41. This phosphorylation of GAPDH is essential for its nuclear translocation and DNA repair function. Blocking the nuclear import of GAPDH by suppressing Src signaling or through a GAPDH Tyr41 mutation impairs its response to DNA damage. Nuclear GAPDH is recruited to DNA lesions and associates with DNA polymerase beta (Pol beta) to function in DNA repair. Nuclear GAPDH promotes Pol beta polymerase activity and increases base excision repair (BER) efficiency. Furthermore, GAPDH knockdown dramatically decreases BER efficiency and sensitizes cells to DNA damaging agents. Importantly, the knockdown of GAPDH in colon cancer SW480 cells and xenograft models effectively enhances their sensitivity to the chemotherapeutic drug 5-FU. In summary, our findings provide mechanistic insight into the new function of GAPDH in DNA repair and suggest a potential therapeutic target in chemotherapy. CI - (c) 2020 Federation of American Societies for Experimental Biology. FAU - Ci, Shusheng AU - Ci S AD - Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China. FAU - Xia, Wen AU - Xia W AD - Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China. FAU - Liang, Weichu AU - Liang W AD - Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China. FAU - Qin, Lihong AU - Qin L AD - Department of Oncology, No. 7 People's Hospital of ChangZhou, Changzhou, China. FAU - Zhang, Yilan AU - Zhang Y AD - Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China. FAU - Dianov, Grigory L AU - Dianov GL AD - Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China. AD - Department of Natural Sciences, Novosibirsk State University, Novosibirsk, Russia. AD - Department of Oncology, Oxford Institute for Radiation Oncology, University of Oxford, Oxford, UK. FAU - Wang, Meina AU - Wang M AD - Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China. FAU - Zhao, Xingqi AU - Zhao X AD - Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China. FAU - Wu, Congye AU - Wu C AD - Department of Oncology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China. FAU - Alagamuthu, Karthick Kumar AU - Alagamuthu KK AD - Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China. FAU - Hu, Zhigang AU - Hu Z AD - Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China. FAU - He, Lingfeng AU - He L AD - Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China. FAU - Pan, Feiyan AU - Pan F AD - Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China. FAU - Guo, Zhigang AU - Guo Z AD - Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20200615 PL - United States TA - FASEB J JT - FASEB journal : official publication of the Federation of American Societies for Experimental Biology JID - 8804484 RN - 9007-49-2 (DNA) RN - EC 1.2.1.12 (GAPDH protein, human) RN - EC 1.2.1.12 (Glyceraldehyde-3-Phosphate Dehydrogenase (Phosphorylating)) RN - EC 2.7.10.2 (src-Family Kinases) RN - EC 2.7.7.7 (DNA Polymerase beta) SB - IM MH - Active Transport, Cell Nucleus/genetics MH - Animals MH - Cell Line, Tumor MH - Cell Nucleus/*genetics/*metabolism MH - Colonic Neoplasms/genetics/metabolism MH - DNA/genetics MH - DNA Damage/*genetics MH - DNA Polymerase beta/genetics/metabolism MH - DNA Repair/genetics MH - Female MH - Glyceraldehyde-3-Phosphate Dehydrogenase (Phosphorylating)/*genetics/*metabolism MH - HEK293 Cells MH - Heterografts MH - Humans MH - Mice MH - Mice, Inbred BALB C MH - Mice, Nude MH - Mutation/genetics MH - Phosphorylation/*genetics MH - Protein Transport/genetics MH - Signal Transduction/genetics MH - src-Family Kinases/genetics/*metabolism OTO - NOTNLM OT - DNA damage OT - GAPDH OT - Pol beta OT - Src OT - base excision repair OT - chemotherapy EDAT- 2020/06/17 06:00 MHDA- 2021/03/02 06:00 CRDT- 2020/06/16 06:00 PHST- 2019/11/16 00:00 [received] PHST- 2020/05/06 00:00 [revised] PHST- 2020/05/22 00:00 [accepted] PHST- 2020/06/17 06:00 [pubmed] PHST- 2021/03/02 06:00 [medline] PHST- 2020/06/16 06:00 [entrez] AID - 10.1096/fj.201902904RR [doi] PST - ppublish SO - FASEB J. 2020 Aug;34(8):10443-10461. doi: 10.1096/fj.201902904RR. Epub 2020 Jun 15.