Abstract
PARP-catalysed ADP-ribosylation (ADPr) is important in regulating various cellular pathways. Until recently, PARP-dependent mono-ADP-ribosylation has been poorly understood due to the lack of sensitive detection methods. Here, we utilised an improved antibody to detect mono-ADP-ribosylation. We visualised endogenous interferon (IFN)-induced ADP-ribosylation and show that PARP14 is a major enzyme responsible for this modification. Fittingly, this signalling is reversed by the macrodomain from SARS-CoV-2 (Mac1), providing a possible mechanism by which Mac1 counteracts the activity of antiviral PARPs. Our data also elucidate a major role of PARP9 and its binding partner, the E3 ubiquitin ligase DTX3L, in regulating PARP14 activity through protein-protein interactions and by the hydrolytic activity of PARP9 macrodomain 1. Finally, we also present the first visualisation of ADPr-dependent ubiquitylation in the IFN response. These approaches should further advance our understanding of IFN-induced ADPr and ubiquitin signalling processes and could shed light on how different pathogens avoid such defence pathways.
| Originalsprog | Engelsk |
|---|---|
| Tidsskrift | EMBO Journal |
| Vol/bind | 43 |
| Udgave nummer | 14 |
| Sider (fra-til) | 2929-2953 |
| ISSN | 0261-4189 |
| DOI | |
| Status | Udgivet - 2024 |
Bibliografisk note
Funding Information:We would like to thank Ivan Matic for his kind gift of IgG- and HRP-conjugated anti-mono-ADPr antibodies. We thank the Soeding lab for generously providing public access to their MMSeqs2 prediction server. We also thank the Alan Wainman and the Dunn School Bioimaging Facility for expert advice and access to the microscope. We would like to thank Joey Riepsaame and the Genome Engineering Oxford (GEO) Facility for help making the DTX3L knockout cells. The work in Ivan Ahel\u2019s lab is supported by the following grants: Biotechnology and Biological Sciences Research Council (BB/R007195/1 and BB/W016613/1), Wellcome Trust (210634), Oxford University Challenge Seed Fund (USCF 456), Ovarian Cancer Research Alliance (813369). Ivan Ahel and Sumana Sanyal are jointly supported by Wellcome Trust (223107). The work in Dragana Ahel\u2019s lab is supported by the Edward Penley Abraham Research Fund. The Huet lab receives funding from the Agence Nationale de la Recherche (ANR-22-CE12-0039 AROSE), the Fondation ARC pour la recherche sur le cancer (ARCPJA2022060005190) and the Ligue Contre le Cancer (CD53).
Publisher Copyright:
© The Author(s) 2024.