The activity of Saccharomyces cerevisiae Na+, K+/H+ antiporter Nha1 is negatively regulated by 14-3-3 protein binding at serine 481
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388963%3A_____%2F19%3A00517811" target="_blank" >RIV/61388963:_____/19:00517811 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/67985823:_____/19:00517832 RIV/61388971:_____/19:00517832 RIV/00216208:11310/19:10403509
Výsledek na webu
<a href="https://www.sciencedirect.com/science/article/pii/S0167488919301478?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0167488919301478?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.bbamcr.2019.118534" target="_blank" >10.1016/j.bbamcr.2019.118534</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
The activity of Saccharomyces cerevisiae Na+, K+/H+ antiporter Nha1 is negatively regulated by 14-3-3 protein binding at serine 481
Popis výsledku v původním jazyce
Na+/H+ antiporters are involved in ensuring optimal intracellular concentrations of alkali-metal cations and protons in most organisms. In Saccharomyces cerevisiae, the plasma-membrane Na+, K+/H+ antiporter Nha1 mediates Na+ and K+ efflux, which is important for cell growth in the presence of salts. Nha1 belongs among housekeeping proteins and, due to its ability to export K+, it has many physiological functions. The Nha1 transport activity is regulated through its long, hydrophilic and unstructured C-terminus (554 of 985 aa). Although Nha1 has been previously shown to interact with the yeast 14-3-3 isoform (Bmh2), the binding site remains unknown. In this work, we identified the residues through which Nha1 interacts with the 14-3-3 protein. Biophysical characterization of the interaction between the C-terminal polypeptide of Nha1 and Bmh proteins in vitro revealed that the 14-3-3 protein binds to phosphorylated Ser481 of Nha1, and the crystal structure of the phosphopeptide containing Ser481 bound to Bmh1 provided the structural basis of this interaction. Our data indicate that 14-3-3 binding induces a disorder-to-order transition of the C-terminus of Nha1, and in vivo experiments showed that the mutation of Ser481 to Ala significantly increases cation efflux activity via Nha1, which renders cells sensitive to low K+ concentrations. Hence, 14-3-3 binding is apparently essential for the negative regulation of Nha1 activity, which should be low under standard growth conditions, when low amounts of toxic salts are present and yeast cells need to accumulate high amounts of K+.
Název v anglickém jazyce
The activity of Saccharomyces cerevisiae Na+, K+/H+ antiporter Nha1 is negatively regulated by 14-3-3 protein binding at serine 481
Popis výsledku anglicky
Na+/H+ antiporters are involved in ensuring optimal intracellular concentrations of alkali-metal cations and protons in most organisms. In Saccharomyces cerevisiae, the plasma-membrane Na+, K+/H+ antiporter Nha1 mediates Na+ and K+ efflux, which is important for cell growth in the presence of salts. Nha1 belongs among housekeeping proteins and, due to its ability to export K+, it has many physiological functions. The Nha1 transport activity is regulated through its long, hydrophilic and unstructured C-terminus (554 of 985 aa). Although Nha1 has been previously shown to interact with the yeast 14-3-3 isoform (Bmh2), the binding site remains unknown. In this work, we identified the residues through which Nha1 interacts with the 14-3-3 protein. Biophysical characterization of the interaction between the C-terminal polypeptide of Nha1 and Bmh proteins in vitro revealed that the 14-3-3 protein binds to phosphorylated Ser481 of Nha1, and the crystal structure of the phosphopeptide containing Ser481 bound to Bmh1 provided the structural basis of this interaction. Our data indicate that 14-3-3 binding induces a disorder-to-order transition of the C-terminus of Nha1, and in vivo experiments showed that the mutation of Ser481 to Ala significantly increases cation efflux activity via Nha1, which renders cells sensitive to low K+ concentrations. Hence, 14-3-3 binding is apparently essential for the negative regulation of Nha1 activity, which should be low under standard growth conditions, when low amounts of toxic salts are present and yeast cells need to accumulate high amounts of K+.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10608 - Biochemistry and molecular biology
Návaznosti výsledku
Projekt
Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2019
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Biochimica Et Biophysica Acta-Molecular Cell Research
ISSN
0167-4889
e-ISSN
—
Svazek periodika
1866
Číslo periodika v rámci svazku
12
Stát vydavatele periodika
NL - Nizozemsko
Počet stran výsledku
14
Strana od-do
118534
Kód UT WoS článku
000498748700016
EID výsledku v databázi Scopus
2-s2.0-85071569389