ATP and Magnesium Drive Conformational Changes of the Na+/K+-ATPase Cytoplasmic Headpiece

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F09%3A00010133" target="_blank" >RIV/61989592:15310/09:00010133 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985823:_____/09:00327403 RIV/00216208:11130/09:5288

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

ATP and Magnesium Drive Conformational Changes of the Na+/K+-ATPase Cytoplasmic Headpiece

Popis výsledku v původním jazyce

Conformational changes of the Na+/K+-ATPase isolated large cytoplasmic segment connecting transmembrane helices M4 and M5 (C45) induced by the interaction with enzyme ligands (i.e. Mg2+ and/or ATP) were investigated by means of the intrinsic tryptophan fluorescence measurement and molecular dynamic simulations. Our data revealed that this model system consisting of only two domains retained the ability to adopt open or closed conformation, i.e. behavior, which is expected from the crystal structures ofrelative Ca2+-ATPase from sarco(endo)plasmic reticulum for the corresponding part of the entire enzyme. Our data revealed that the C45 is found in the closed conformation in the absence of any ligand, in the presence of Mg2+ only, or in the simultaneouspresence of Mg2+ and ATP. Binding of the ATP alone (i.e. in the absence of Mg2+) induced open conformation of the C45. The fact that the transmembrane part of the enzyme was absent in our experiments suggested that the observed conformati

Název v anglickém jazyce

ATP and Magnesium Drive Conformational Changes of the Na+/K+-ATPase Cytoplasmic Headpiece

Popis výsledku anglicky

Conformational changes of the Na+/K+-ATPase isolated large cytoplasmic segment connecting transmembrane helices M4 and M5 (C45) induced by the interaction with enzyme ligands (i.e. Mg2+ and/or ATP) were investigated by means of the intrinsic tryptophan fluorescence measurement and molecular dynamic simulations. Our data revealed that this model system consisting of only two domains retained the ability to adopt open or closed conformation, i.e. behavior, which is expected from the crystal structures ofrelative Ca2+-ATPase from sarco(endo)plasmic reticulum for the corresponding part of the entire enzyme. Our data revealed that the C45 is found in the closed conformation in the absence of any ligand, in the presence of Mg2+ only, or in the simultaneouspresence of Mg2+ and ATP. Binding of the ATP alone (i.e. in the absence of Mg2+) induced open conformation of the C45. The fact that the transmembrane part of the enzyme was absent in our experiments suggested that the observed conformati

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BO - Biofyzika

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2009

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Biochimica et Biophysica Acta - Biomembranes

ISSN

0005-2736

e-ISSN

—

Svazek periodika

1788

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

—

Kód UT WoS článku

000266190600019

EID výsledku v databázi Scopus

—