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Consulta: subjectFacets:"Alternative oxidase"
Registros recuperados: 5
Data/hora: 09/06/2017 04:17:20
Activity and functional interaction of alternative oxidase and uncoupling protein in mitochondria
from tomato fruit
Provedor de dados: 56
Autores: Sluse,F.E.; Jarmuszkiewicz,W.
Cyanide-resistant alternative oxidase (AOX) is not limited to plant mitochondria and is widespread among several types of
protists. The uncoupling protein (UCP) is much more widespread than previously believed, not only in tissues of higher animals
but also in plants and in an amoeboid protozoan. The redox energy-dissipating pathway (AOX) and the proton electrochemical
gradient energy-dissipating pathway (UCP) lead to the same final effect, i.e., a decrease in ATP synthesis and an increase in heat
production. Studies with green tomato fruit mitochondria show that both proteins are present simultaneously in the membrane.
This raises the question of a specific physiological role for each energy-dissipating system and of a possible functional
connection...
Tipo: Journal article
Palavras-chave: Plant mitochondria; Alternative oxidase; Uncoupling protein; Regulation; Electron partitioning.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000300002
Alternative mitochondrial functions in cell physiopathology: beyond ATP production
Provedor de dados: 56
Autores: Kowaltowski,A.J.
It is well known that mitochondria are the main site for ATP generation within most tissues. However, mitochondria also
participate in a surprising number of alternative activities, including intracellular Ca2+ regulation, thermogenesis and the control
of apoptosis. In addition, mitochondria are the main cellular generators of reactive oxygen species, and may trigger necrotic cell
death under conditions of oxidative stress. This review concentrates on these alternative mitochondrial functions, and their role in
cell physiopathology.
Tipo: Journal article
Palavras-chave: Mitochondrial permeability transition; Uncoupling proteins; Alternative oxidase; Cardioprotection; Free
radicals; Aging.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000200014
Alternative oxidase in the branched mitochondrial respiratory network: an overview on structure,
function, regulation, and role
Provedor de dados: 56
Autores: Sluse,F.E.; Jarmuszkiewicz,W.
Plants and some other organisms including protists possess a complex branched respiratory network in their mitochondria. Some
pathways of this network are not energy-conserving and allow sites of energy conservation to be bypassed, leading to a decrease
of the energy yield in the cells. It is a challenge to understand the regulation of the partitioning of electrons between the various
energy-dissipating and -conserving pathways. This review is focused on the oxidase side of the respiratory chain that presents a
cyanide-resistant energy-dissipating alternative oxidase (AOX) besides the cytochrome pathway. The known structural properties
of AOX are described including transmembrane topology, dimerization, and active sites. Regulation of the alternative...
Tipo: Journal article
Palavras-chave: Mitochondria; Alternative oxidase; Structure; Regulation; Electron partitioning.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000600003
Influence of light regimes on respiration, activity of alternative respiratory pathway and
carbohydrates content in mature leaves of Ajuga reptans L.
Provedor de dados: 93
Autores: PYSTINA,NATALIA V.; DANILOV,ROMAN A.
Influence of different light regimes (plants grown in shade and in the sun) on respiration, activity of alternative respiratory
pathway and carbohydrates content in mature leaves of Ajuga reptans L. was investigated. All experiments were carried out under
natural conditions. Sun plants had higher respiration, activity of the alternative pathway and carbohydrates content compared to
the shade plants. Additional experiments were performed in order to study effects of darkening as well as evolution of respiration
and carbohydrates concentrations in leaves of A. reptans during the day. Darkening led to a decline in total respiration in all types
of plants investigated. Activity of the alternative pathway remained unchanged by 20 % in the leaves of the shade...
Tipo: Journal article
Palavras-chave: Alternative respiratory pathway; Respiration; Alternative oxidase; Leaves; Light; Carbohydrates.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312001000300004
Temperature-dependent alterations of respiration in leaves of two selected vascular plant species: the
role of the alternative oxidase pathway
Provedor de dados: 53
Autores: Pystina,Natalia V.; Danilov,Roman A.
Effects of higher temperatures on respiration and activity of alternative oxidase (AOX) were studied in mature leaves of Ajuga
reptans L. and Rhodiola rosea L. Total respiration in both A. reptans and R. rosea increased exponentially with the increasing
temperature of 10 °C to 35 °C. Respiration in the presence of benzhydroxamic acid (BHAM) also increased exponentially in
accordance with the increasing temperature in the leaves of both A. reptans and R. rosea. Relative activity of the alternative
pathway decreased significantly in the leaves of A. reptans with increasing temperatures. However, an increase in the relative
activity of the alternative pathway was detected in the leaves of R. rosea. Thermoresistance of the alternative respiratory pathway
was...
Tipo: Journal article
Palavras-chave: Alternative respiratory pathway; Respiration; Alternative oxidase; Leaves; Temperature.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052002000200004