Naslov
Reversible ADP-ribosylation of RNA

Autori
Munnur, Deeksha ; Bartlett, Edward ; Mikolčević, Petra ; Kirby, Ilsa T ; Rack, Johannes Gregor Matthias ; Mikoč, Andreja ; Cohen, Michael S ; Ahel, Ivan

Izvornik
Nucleic acids research (0305-1048) 47 (2019), 11; 5658-5669

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
ADP-ribosylation ; macrodomain ; nucleic acid ADP-ribosylation ; Tpt1 ; KptA

Sažetak
ADP-ribosylation is a reversible chemical modification catalysed by ADP-ribosyltransferases such as PARPs that utilize nicotinamide adenine dinucleotide (NAD+) as a cofactor to transfer monomer or polymers of ADP-ribose nucleotide onto macromolecular targets such as proteins and DNA. ADP-ribosylation plays an important role in several biological processes such as DNA repair, transcription, chromatin remodelling, host-virus interactions, cellular stress response and many more. Using biochemical methods we identify RNA as a novel target of reversible mono-ADP- ribosylation. We demonstrate that the human PARPs - PARP10, PARP11 and PARP15 as well as a highly diverged PARP homologue TRPT1, ADP-ribosylate phosphorylated ends of RNA. We further reveal that ADP-ribosylation of RNA mediated by PARP10 and TRPT1 can be efficiently reversed by several cellular ADP-ribosylhydrolases (PARG, TARG1, MACROD1, MACROD2 and ARH3), as well as by MACROD- like hydrolases from VEEV and SARS viruses. Finally, we show that TRPT1 and MACROD homologues in bacteria possess activities equivalent to the human proteins. Our data suggest that RNA ADP- ribosylation may represent a widespread and physiologically relevant form of reversible ADP- ribosylation signalling.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Interdisciplinarne prirodne znanosti

POVEZANOST RADA