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Type: Artigo de periódico
Title: A highly active ATP-insensitive K+ import pathway in plant mitochondria
Author: Ruy, F
Vercesi, AE
Andrade, PBM
Bianconi, ML
Chaimovich, H
Kowaltowski, AJ
Abstract: We describe here a regulated and highly active K+ uptake pathway in potato ( Solanum tuberosum), tomato ( Lycopersicon esculentum), and maize (Zea mays) mitochondria. K+ transport was not inhibited by ATP, NADH, or thiol reagents, which regulate ATP-sensitive K+ channels previously described in plant and mammalian mitochondria. However, K+ uptake was completely prevented by quinine, a broad spectrum K+ channel inhibitor. Increased K+ uptake in plants leads to mitochondrial swelling, respiratory stimulation, heat release, and the prevention of reactive oxygen species formation. This newly described ATP-insensitive K+ import pathway is potentially involved in metabolism regulation and prevention of oxidative stress.
Subject: potassium channel
Solanum tuberosum
reactive oxygen species
Country: EUA
Editor: Kluwer Academic/plenum Publ
Citation: Journal Of Bioenergetics And Biomembranes. Kluwer Academic/plenum Publ, v. 36, n. 2, n. 195, n. 202, 2004.
Rights: fechado
Identifier DOI: 10.1023/B:JOBB.0000023623.70126.04
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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