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001-es BibID:BIBFORM107128
035-os BibID:(cikkazonosító)102896 (WoS)001009016200001 (Scopus)85147540608
Első szerző:Rehó Bálint
Cím:Agonist-controlled competition of RAR and VDR nuclear receptors for heterodimerization with RXR is manifested in their DNA-binding / Rehó Bálint, Fadel Lina, Brazda Peter, Benziane Anass, Hegedüs Éva, Sen Pialy, Gadella Theodorus W. Jr., Tóth Katalin, Nagy László, Vámosi György
Dátum:2023
ISSN:0021-9258 1083-351X
Megjegyzések:We found previously that nuclear receptors (NRs) compete for heterodimerization with their common partner, retinoid X receptor (RXR), in a ligand-dependent manner. To investigate potential competition in their DNA binding, we monitored the mobility of retinoic acid receptor (RAR) and vitamin D receptor (VDR) in live cells by fluorescence correlation spectroscopy. First, specific agonist treatment and RXR coexpression additively increased RAR DNA binding, while both agonist and RXR were required for increased VDR DNA binding, indicating weaker DNA binding of the VDR/RXR dimer. Second, coexpression of RAR, VDR, and RXR resulted in competition for DNA binding. Without ligand, VDR reduced the DNA-bound fraction of RAR and vice versa, i.e., a fraction of RXR molecules was occupied by the competing partner. The DNA-bound fraction of either RAR or VDR was enhanced by its own and diminished by the competing NR`s agonist. When treated with both ligands, the DNA-bound fraction of RAR increased as much as due to its own agonist, whereas that of VDR increased less. RXR agonist also increased DNA binding of RAR at the expense of VDR. In summary, competition between RAR and VDR for RXR is also manifested in their DNA binding in an agonist-dependent manner: RAR dominates over VDR in the absence of agonist or with both agonists present. Thus, side effects of NR-ligand-based (retinoids, thiazolidinediones) therapies may be ameliorated by other NR ligands and be at least partly explained by reduced DNA binding due to competition. Our results also complement the model of NR action by involving competition both for RXR and for DNA sites.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Journal Of Biological Chemistry. - 299 : 2 (2023), p. 1-16. -
További szerzők:Fadel, Lina (1988-) (gyógyszerész) Brázda Péter (1980-) (biológus, angol-magyar szakfordító) Benziane, Anass (1990-) (molekuláris biológus) Hegedűs Éva (1978-) (biofizikus) Sen, Pialy Gadella, Theodorus W. Jr. Tóth Katalin (biofizikus) Nagy László (1966-) (molekuláris sejtbiológus, biokémikus) Vámosi György (1967-) (biofizikus)
Pályázati támogatás:GINOP-2.3.2-15-2016-00026
GINOP
NN129371
OTKA
ANN135107
OTKA
Tempus Public Foundation: Stipendium Hungaricum scholarship
Egyéb
German Academic Exchange Service and the Tempus Public Foundation #273478
Egyéb
Internet cím:Szerző által megadott URL
DOI
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2.

001-es BibID:BIBFORM083089
035-os BibID:(WoS)000509420400074 (Scopus)85078380578
Első szerző:Rehó Bálint
Cím:Simultaneous Mapping of Molecular Proximity and Comobility Reveals Agonist-Enhanced Dimerization and DNA Binding of Nuclear Receptors / Rehó Bálint, Lau Lukas, Mocsár Gábor, Müller Gabriele, Fadel Lina, Brázda Péter, Nagy László, Tóth Katalin, Vámosi György
Dátum:2020
ISSN:0003-2700
Megjegyzések:Single Plane Illumination Microscopy (SPIM) revolutionized time lapse imaging of live cells and organisms due to its high speed and reduced photodamage. Quantitative mapping of molecular (co)mobility by fluorescence (cross-) correlation spectroscopy (F(C)CS) in a SPIM has been introduced to reveal molecular diffusion and binding. A complementary aspect of interactions is proximity, which can be studied by Fo?rster resonance energy transfer (FRET). Here, we extend SPIM-FCCS by alternating laser excitation, which reduces false positive cross-correlation and facilitates comapping of FRET. Thus, different aspects of interacting systems can be studied simultaneously, and molecular subpopulations can be discriminated by multiparameter analysis. After demonstrating the benefits of the method on the AP-1 transcription factor, the dimerization and DNA binding behavior of retinoic acid receptor (RAR) and retinoid X receptor (RXR) is revealed, and an extension of the molecular switch model of the nuclear receptor action is proposed. Our data imply that RAR agonist enhances RAR?RXR heterodimerization, and chromatin binding/dimerization are positively correlated. We also propose a ligand induced conformational change bringing the N-termini of RAR and RXR closer together. The RXR agonist increased homodimerization of RXR suggesting that RXR may act as an autonomous transcription factor.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Analytical Chemistry. - 92 : 2 (2020), p. 2207-2215. -
További szerzők:Lau, Lukas Mocsár Gábor (1981-) (biofizikus) Müller, Gabriele Fadel, Lina (1988-) (gyógyszerész) Brázda Péter (1980-) (biológus, angol-magyar szakfordító) Nagy László (1966-) (molekuláris sejtbiológus, biokémikus) Tóth Katalin (biofizikus) Vámosi György (1967-) (biofizikus)
Pályázati támogatás:GINOP-2.3.2-15-2016-00026
GINOP
GINOP-2.3.3-15-2016-00030
GINOP
NN129371 from the National Research, Development, and Innovation Office, Hungary
Egyéb
German Academic Exchange Service
Egyéb
Tempus Public Foundation 273478
Egyéb
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:
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