Home General Physiology and Biophysics 2009 General Physiology and Biophysics Vol.28, No.3, p.302-306, 2009

Journal info

Quarterly, 80 pp. per issue
Founded: 1982
ISSN  1338-4325 (online)

Published in English

Aims and Scope
Editorial Info
Abstracting and Indexing
Submission Guidelines

Select Journal

Webshop Cart

Your Cart is currently empty.

Info: Your browser does not accept cookies. To put products into your cart and purchase them you need to enable cookies.

General Physiology and Biophysics Vol.28, No.3, p.302-306, 2009

Title: Influence of decavanadate on rat synaptic plasma membrane ATPases activity
Author: Danijela Krstić, Mirjana Čolović, Nada Bošnjaković-Pavlović, Anne Spasojević-De Bire and Vesna Vasić

Abstract: The in vitro influence of decameric vanadate species on Na+/K+-ATPase, plasma membrane Ca2+-ATPase (PMCA)-calcium pump and ecto-ATPase activity, using rat synaptic plasma membrane (SPM) as model system was investigated, whereas the commercial porcine cerebral cortex Na+/K+-ATPase served as a reference. The thermal behaviour of the synthesized decavanadate (V10) has been studied by differential scanning calorimetry and thermogravimetric analysis, while the type of polyvanadate anion was identified using the IR spectroscopy. The concentration-dependent responses to V10 of all enzymes were obtained. The half-maximum inhibitory concentration (IC50) of the enzyme activity was achieved at (4.74 ± 1.15) × 10–7 mol/l for SPM Na+/K+-ATPase, (1.30 ± 0.10) × 10–6 mol/l for commercial Na+/K+-ATPase and (3.13 ± 1.70) × 10–8 mol/l for Ca2+-ATPase, while ecto-ATPase is significantly less sensitive toward V10 (IC50 = (1.05 ± 0.10) × 10–4 mol/l) than investigated P-type ATPases. Kinetic analysis showed that V10 inhibited Na+/K+-ATPase by reducing the maximum enzymatic velocity and apparent affinity for ATP (increasing Km value), implying a mixed mode of interaction between V10 and P-type ATPases.

Keywords: Decavanadate — Na+/K+-ATPase — Plasma membrane Ca2+-ATPase — ecto-ATPase
Year: 2009, Volume: 28, Issue: 3 Page From: 302, Page To: 306

download file

© AEPress s.r.o
Copyright notice: For any permission to reproduce, archive or otherwise use the documents in the ELiS, please contact AEP.