Proteomics

Dataset Information

0

Identification of PNPase and RhlB binding proteins in Deinococcus radiodurans


ABSTRACT: 8-oxo-7,8-dihydroguanine (8-oxoG) is a common RNA oxidation that has been implicated in carcinogenesis, neurodegeneration, and aging. Some? Many? RNA-binding proteins have shown binding preference for 8-oxoG modified RNA; such binding? can protect cells from oxidative stress. To date, the presence of specific 8-oxoG-recognizing proteins is only known in model organisms, but, how these proteins cooperate is still unclear. Here, we use RNA affinity chromatography and mass spectrometry to search for proteins that specifically bind 8-oxoG-modified RNA in Deinococcus radiodurans, an extremophilic bacterium with extraordinary resistance to oxidative stresses. We identified four proteins that selectively bind to oxidized RNA: polynucleotide phosphorylase (DR_2063/PNPase), ATP-dependent DEAD-box RNA helicase (DR_0335/RhlB), ribosomal protein S1 (DR_1983/RpsA), and transcriptional termination factor (DR_1338/Rho). The knockout of PNPase and RhlB in D. radiodurans caused increased sensitivity to hydrogen peroxide and a significant accumulation of 8-oxoG modified RNA. Importantly, PNPase directly interacts with RhlB in D. radiodurans; however, no additional phenotypic effect was observed for the double deletion of pnp and rhlB compared to the individual single deletions. Overall, our findings suggest a role of the PNPase-RhlB complex in targeting 8-oxoG-modified RNAs for rapid degradation and thereby constitutes an important component of D. radiodurans resistance to oxidative stress.

INSTRUMENT(S): Orbitrap Fusion

ORGANISM(S): Deinococcus Radiodurans Atcc 13939

SUBMITTER: RUNHUA HAN  

LAB HEAD: Lydia M. Contreras

PROVIDER: PXD028866 | Pride | 2022-07-09

REPOSITORIES: pride

Dataset's files

Source:
Action DRS
8040_RH_1.msf Msf
8040_RH_10.msf Msf
8040_RH_11.msf Msf
8040_RH_12.msf Msf
8040_RH_2.msf Msf
Items per page:
1 - 5 of 24

Similar Datasets

2022-07-10 | PXD028861 | Pride
2014-01-13 | E-GEOD-54007 | biostudies-arrayexpress
2024-05-23 | MSV000094855 | MassIVE
2023-06-22 | PXD019906 | Pride
2013-04-04 | E-GEOD-45771 | biostudies-arrayexpress
2016-01-13 | E-GEOD-69856 | biostudies-arrayexpress
2014-01-13 | GSE54007 | GEO
2021-09-08 | PXD028122 | Pride
2023-09-20 | GSE243342 | GEO
2020-07-27 | GSE137017 | GEO