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Artículo
A gibberellin-induced nuclease is localized in the nucleus of wheat aleurone cells undergoing programmed cell death
(The American Society for Biochemistry and Molecular Biology, 2003)
The aleurone layer of cereal grains undergoes a gibberellin-regulated process of programmed cell death (PCD) following germination. We have applied a combination of ultrastructural and biochemical approaches to analyze ...
Artículo
Arsenic sensing and resistance system in the cyanobacterium Synechocystis sp. Strain PCC 6803
(American Society for Microbiology, 2003-09)
Arsenic is one of the most important global environmental pollutants. Here we show that the cyanobacterium Synechocystis sp. strain PCC 6803 contains an arsenic and antimony resistance operon consisting of three genes: ...
Artículo
Functional complementation of yeast cytosolic pyrophosphatase by bacterial and plant H -translocating pyrophosphatases
(National Academy of Sciences, 2002)
Two types of proteins that hydrolyze inorganic pyrophosphate (PPi), very different in both amino acid sequence and structure, have been characterized to date: soluble and membrane-bound proton-pumping pyrophosphatases ...
Artículo
Descripción ultraestructural de Euglena pailasensis (Euglenozoa) del Volcán Rincón de la Vieja, Guanacaste, Costa Rica
(Universidad de Costa Rica, 2004)
The euglenoids are unicellular eukaryotic flagellates living in a diversity of soils and aquatic environments and ecosystems. This study describes the ultrastructure of an euglenoid isolated from the surface of a boiling ...
Artículo
The Interactions of Cyanobacterial Cytochromec6 and Cytochrome f, Characterized by NMR
(Elsevier, 2002)
During oxygenic photosynthesis, cytochromec6 shuttles electrons between the membrane-bound complexes cytochrome bf and photosystem I. Complex formation between Phormidium laminosum cytochromef and cytochrome c6 from ...
Artículo
Differential regulation of soluble and membrane-bound inorganic pyrophosphatases in the photosynthetic bacterium Rhodospirillum rubrum provides insights into pyrophosphate-based stress bioenergetics
(American Society for Microbiology, 2004)
Soluble and membrane-bound inorganic pyrophosphatases (sPPase and H -PPase, respectively) of the purple nonsulfur bacterium Rhodospirillum rubrum are differentially regulated by environmental growth conditions. Both ...
Artículo
CcpC-dependent regulation of citrate synthase gene expression in Listeria monocytogenes
(American Society for Microbiology, 2009)
Citrate synthase, the first and rate-limiting enzyme of the tricarboxylic acid branch of the Krebs cycle, was shown to be required for de novo synthesis of glutamate and glutamine in Listeria monocytogenes. The citrate ...
Artículo
Glucose uptake and its effect on gene expression in Prochlorococcus
(Public Library of Science, 2008)
The marine cyanobacteria Prochlorococcus have been considered photoautotrophic microorganisms, although the utilization of exogenous sugars has never been specifically addressed in them. We studied glucose uptake in different ...
Artículo
The NtcA-dependent P1 promoter is utilized for glnA expression in N2-fixing heterocysts of Anabaena sp. strain PCC 7120
(American Society for Microbiology, 2004-11)
Expression of the glnA gene encoding glutamine synthetase, a key enzyme in nitrogen metabolism, is subject to a variety of regulatory mechanisms in different organisms. In the filamentous, N2-fixing cyanobacteritim Anabaena ...
Artículo
Differential pattern of expression and sugar regulation of Arabidopsis thaliana ADP-glucose pyrophosphorylase-encoding genes
(Elsevier, 2005)
ADP-glucose pyrophoshorylase (ADP-Glc PPase) catalyzes the first and limiting step in starch biosynthesis. In plants, the enzyme is composed of two types of subunits (small and large) and is allosterically regulated by ...