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001-es BibID:	BIBFORM122693
Első szerző:	Kelemen Adrienn (Biológus)
Cím:	Treatments with diquat reveal the relationship between protein phosphatases (PP2A) and oxidative stress during mitosis in Arabidopsis thaliana Root meristems / Adrienn Kelemen, Tamás Garda, Zoltán Kónya, Ferenc Erdődi, László Ujlaky-Nagy, Gabriella Petra Juhász, Csongor Freytag, Márta M-Hamvas, Csaba Máthé
Dátum:	2024
ISSN:	2223-7747
Megjegyzések:	Reversible protein phosphorylation regulates various cellular mechanisms in eukaryotes by altering the conformation, activity, localization, and stability of substrate proteins. In Arabidopsis thaliana root meristems, histone post-translational modifications are crucial for proper cell division, and they are also involved in oxidative stress signaling. To investigate the link between reactive oxygen species (ROS) and mitosis, we treated various Arabidopsis genotypes, including wild-types and mutants showing dysfunctional PP2A, with the ROS-inducing herbicide diquat (DQ). Studying the c3c4 double catalytic subunit mutant and fass regulatory subunit mutants of PP2A provided insights into phosphorylation-dependent mitotic processes. DQ treatment reduced mitotic activity in all genotypes and caused early mitotic arrest in PP2A mutants, likely due to oxidative stressinduced damage to essential mitotic processes. DQ had a minimal effect on reversible histone H3 phosphorylation in wild-type plants but significantly decreased phospho-histone H3 levels in PP2A mutants. Following drug treatment, the phosphatase activity decreased only in the stronger phenotype mutant plants (fass-5 and c3c4). Our findings demonstrate that (i) the studied PP2A loss-of-function mutants are more sensitive to increased intracellular ROS and (ii) DQ has indirect altering effects of mitotic activities and histone H3 phosphorylation. All these findings underscore the importance of PP2A in stress responses.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk protein phosphatases PP2A FASS C3-C4 histone H3 phosphorylation mitosis reactive oxygen species (ROS) Arabidopsis thaliana diquat
Megjelenés:	Plants-Basel. - 13 : 14 (2024), p. 1-16. -
További szerzők:	Garda Tamás (1990-) (biológus) Kónya Zoltán (1986-) (molekuláris biológus, biokémikus) Erdődi Ferenc (1953-) (biokémikus) Ujlaky-Nagy László (1977-) (biofizikus) Juhász Gabriella Petra (1994-) (biologia tanár) Freytag Csongor (1993-) (biológus) Mikóné Hamvas Márta (1963-) (biológus) Máthé Csaba (1966-) (biológus)
Pályázati támogatás:	OTKA-120638 OTKA ÚNKP-20-2-1-DE-129 Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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