Regulation of Poly(ADP-Ribose) Polymerase 1 Activity by Y-Box-Binding Protein 1

Y-box-binding protein 1 (YB-1) is a multifunctional positively charged protein that interacts with DNA or RNA and poly(ADP-ribose) (PAR). YB-1 is poly(ADP-ribosyl)ated and stimulates poly(ADP-ribose) polymerase 1 (PARP1) activity. Here, we studied the mechanism of YB-1-dependent PAR synthesis by PARP1 in vitro using biochemical and atomic force microscopy assays. PAR synthesis activity of PARP1 is known to be facilitated by co-factors such as Mg2+. However, in contrast to an Mg2+-dependent reaction, the activation of PARP1 by YB-1 is accompanied by overall up-regulation of protein PARylation and shortening of the PAR polymer. Therefore, YB-1 and cation co-factors stimulated PAR synthesis in divergent ways. PARP1 autoPARylation in the presence of YB-1 as well as trans-PARylation of YB-1 are greatly affected by the type of damaged DNA, suggesting that PARP1 activation depends on the formation of a PARP1-YB-1-DNA ternary complex. An unstructured C-terminal part of YB-1 involved in an interaction with PAR behaves similarly to full-length YB-1, indicating that both DNA and PAR binding are involved in the stimulation of PARP1 activity by YB-1. Thus, YB-1 is likely linked to the regulation of PARylation events in cells via an interaction with PAR and damaged DNA.

Medienart:

E-Artikel

Erscheinungsjahr:

2020

Erschienen:

2020

Enthalten in:

Zur Gesamtaufnahme - volume:10

Enthalten in:

Biomolecules - 10(2020), 9 vom: 16. Sept.

Sprache:

Englisch

Beteiligte Personen:

Naumenko, Konstantin N [VerfasserIn]
Sukhanova, Mariya V [VerfasserIn]
Hamon, Loic [VerfasserIn]
Kurgina, Tatyana A [VerfasserIn]
Alemasova, Elizaveta E [VerfasserIn]
Kutuzov, Mikhail M [VerfasserIn]
Pastré, David [VerfasserIn]
Lavrik, Olga I [VerfasserIn]

Links:

Volltext

Themen:

26656-46-2
9007-49-2
DNA
EC 2.4.2.30
I38ZP9992A
Journal Article
Magnesium
Nucleosomes
PARP1 protein, human
Poly(ADP-ribose) polymerase 1
Poly (ADP-Ribose) Polymerase-1
Poly Adenosine Diphosphate Ribose
Protein poly(ADP-ribosyl)ation
Research Support, Non-U.S. Gov't
Y-Box-Binding Protein 1
Y-box-binding protein 1

Anmerkungen:

Date Completed 13.09.2021

Date Revised 13.09.2021

published: Electronic

Citation Status MEDLINE

doi:

10.3390/biom10091325

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM315193697