RESEARCH ARTICLE Identification of PARP-7 substrates reveals a role for MARylation in microtubule control in ovarian cancer cells Lavanya H Palavalli Parsons1,2,3†‡, Sridevi Challa1,2†, Bryan A Gibson1,2†§, Tulip Nandu1,2, MiKayla S Stokes1,2, Dan Huang1,2,4, Jayanthi S Lea3, W Lee Kraus1,2* 1Laboratory of Signaling and Gene Regulation, Cecil H. and Ida Green Center for Reproductive Biology Sciences, University of Texas Southwestern Medical Center, Dallas, United States; 2Division of Basic Research, Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, United States; 3Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, United States; 4Department of Cardiology, Clinical Center for Human Gene Research, *For correspondence: Union Hospital, Tongji Medical College, Huazhong University of Science and
[email protected] Technology, Wuhan, China †These authors contributed equally to this work ‡ Present address: Department Abstract PARP-7 (TiPARP) is a mono(ADP-ribosyl) transferase whose protein substrates and of Obstetrics, Gynecology, and biological activities are poorly understood. We observed that PARP7 mRNA levels are lower in Reproductive Sciences, ovarian cancer patient samples compared to non-cancerous tissue, but PARP-7 protein nonetheless University of Texas Health contributes to several cancer-related biological endpoints in ovarian cancer cells (e.g. growth, Science Center at Houston, McGovern Medical