2022
Quantitation of Human 14-3-3ζ Dimerization and the Effect of Phosphorylation on Dimer-monomer Equilibria
TROŠANOVÁ, Zuzana, Petr LOUŠA, Aneta KOZELEKOVÁ, Tomáš BROM, Norbert GAŠPARIK et. al.Základní údaje
Originální název
Quantitation of Human 14-3-3ζ Dimerization and the Effect of Phosphorylation on Dimer-monomer Equilibria
Autoři
TROŠANOVÁ, Zuzana (703 Slovensko, domácí), Petr LOUŠA (203 Česká republika, domácí), Aneta KOZELEKOVÁ (203 Česká republika, domácí), Tomáš BROM (203 Česká republika, domácí), Norbert GAŠPARIK (703 Slovensko, domácí), Ján TUNGLI (703 Slovensko, domácí), Veronika WEISOVÁ (703 Slovensko, domácí), Erik ŽUPA (703 Slovensko, domácí), Gabriel ŽOLDÁK a Jozef HRITZ (703 Slovensko, garant, domácí)
Vydání
Journal of Molecular Biology, Elsevier, 2022, 0022-2836
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10608 Biochemistry and molecular biology
Stát vydavatele
Velká Británie a Severní Irsko
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 5.600
Kód RIV
RIV/00216224:14740/22:00125485
Organizační jednotka
Středoevropský technologický institut
UT WoS
000791750700015
Klíčová slova anglicky
14-3-3; phosphorylation; dimerization; dissociation constant; FRET; NMR
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 9. 10. 2024 13:16, Ing. Martina Blahová
Anotace
V originále
14-3-3 proteins are universal regulatory proteins and their function depends on their oligomeric form which may alter between the monomeric, homodimeric and heterodimeric states. The populations of individual oligomeric forms are controlled by Kd values of the dimer–monomer equilibria between the involved isoforms. This complex picture is extended by post-translational modifications, e.g. phosphorylation. In this work, we describe the equilibria between monomers, homo- and heterodimers of the 14-3-3ζ isoform in the unmodified and phosphorylated form. To cover a wide range of dimerization affinities, we combined solution NMR, microscale thermophoresis, native PAGE, and a set of novel fluorescence assays. Using a FRET based assay, we also determined the kinetic parameters of dimerization. We found that phosphorylation of 14-3-3ζ at Ser58 increases its homodimeric Kd value by 6 orders of magnitude. The presented assays allow to efficiently monitor 14-3-3ζ dimerization as a function of external factors, such as temperature, salt concentration, and client protein binding. For instance, we obtained values of both transient and equilibrium thermodynamic constants for the dimerization, and observed a substantial decrease of 14-3-3ζ dimer dissociation rate upon binding to the doubly phosphorylated regulatory domain of tyrosine hydroxylase. In summary, our work provides a conceptual framework to characterise the isoform exchanges of homo- and heterodimers which can significantly deepen our knowledge about the regulatory function of 14-3-3 proteins.
Návaznosti
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