pyrophosphatase/hypoxia

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Low levels of pyrophosphate in transgenic potato plants expressing E. coli pyrophosphatase lead to decreased vitality under oxygen deficiency.

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OBJECTIVE The aim of this study was to investigate the importance of pyrophosphate (PPi) for plant metabolism and survival under low oxygen stress. Responses of roots of wild-type potato plants were compared with roots of transgenic plants containing decreased amounts of PPi as a result of the

Vacuolar H(+)-translocating pyrophosphatase is induced by anoxia or chilling in seedlings of rice.

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The present study was undertaken to determine whether vacuolar H(+)-pyrophosphatase (V-PPase) might replace vacuolar H(+)-ATPase under energy stress due to anoxia or chilling in anoxia-tolerant species such as rice (Oryza sativa L.) and corn (Zea mays L.). The relative transcript level of V-PPase in

Expression of vacuolar H+-pyrophosphatase (OVP3) is under control of an anoxia-inducible promoter in rice.

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Vacuolar H(+)-pyrophosphatase (V-PPase) expression increases in a number of abiotic stresses and is thought to play a role in adaptation to abiotic stresses. This paper reports on the regulation of six V-PPase genes in rice (Oryza sativa L.) coleoptiles under anoxia, using flood tolerant and

Heterologous expression and purification of membrane-bound pyrophosphatases.

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Membrane-bound pyrophosphatases (M-PPases) are enzymes that couple the hydrolysis of inorganic pyrophosphate to pumping of protons or sodium ions. In plants and bacteria they are important for relieving stress caused by low energy levels during anoxia, drought, nutrient deficiency, cold and low

CtBP1 interacts with Ikaros and modulates pituitary tumor cell survival and response to hypoxia.

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C-terminal binding protein (CtBP) is a transcriptional corepressor that plays an important role in mammalian development and tumorigenesis. We demonstrate that CtBP is expressed in adenohypophyseal cells and is expressed at high levels in human corticotroph, somatotroph, and lactotroph pituitary

Preservation of complex I function during hypoxia-reoxygenation-induced mitochondrial injury in proximal tubules.

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Inhibition of complex I has been considered to be an important contributor to mitochondrial dysfunction in tissues subjected to ischemia-reperfusion. We have investigated the role of complex I in a severe energetic deficit that develops in kidney proximal tubules subjected to hypoxia-reoxygenation

Nudix hydrolases with Coenzyme A (CoA) and acyl-CoA pyrophosphatase activities confer growth advantage to Mycobacterium smegmatis.

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Nudix hydrolase family proteins hydrolyse toxic by-products of cellular metabolism such as mutagenic nucleoside triphosphates, sugar nucleotides and signalling molecules. We studied the substrate specificities of Nudix hydrolases encoded by rv3672c and rv3040c from Mycobacterium

Anoxia-enhanced expression of genes isolated by suppression subtractive hybridization from pondweed (Potamogeton distinctus A. Benn.) turions.
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Pondweed (Potamogeton distinctus A. Benn.), a monocot aquatic plant species, has turions, which are overwintering buds forming underground as an asexual reproductive organ. Turions not only survive for more than one month but also elongate under strict anoxia, maintaining high-energy charge by

Regulation of energy metabolism in macrophages during hypoxia. Roles of fructose 2,6-bisphosphate and ribose 1,5-bisphosphate.
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Macrophages can adapt to the absence of oxygen by switching to anaerobic glycolysis. In this study, we investigated (a) the roles of fructose 2,6-bisphosphate (Fru-2,6-P2) and ribose 1,5-bisphosphate (Rib-1,5-P2), potent activators of phosphofructokinase, (b) the enzymes responsible for the

Compartmentalization of adenosine metabolism in cancer cells and its modulation during acute hypoxia.
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Extracellular adenosine mediates diverse anti-inflammatory, angiogenic and vasoactive effects and becomes an important therapeutic target for cancer, which has been translated into clinical trials. This study was designed to comprehensively assess adenosine metabolism in prostate and breast cancer

Acidosis-Induced Changes in Proteome Patterns of the Prostate Cancer-Derived Tumor Cell Line AT-1.
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Under various pathological conditions, such as inflammation, ischemia and in solid tumors, physiological parameters (local oxygen tension or extracellular pH) show distinct tissue abnormalities (hypoxia and acidosis). For tumors, the prevailing microenvironment exerts a strong influence on the

Significance of the V-type ATPase for the adaptation to stressful growth conditions and its regulation on the molecular and biochemical level.
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Two electrogenic H(+)-pumps, the vacuolar type H(+)-ATPase (V-ATPase) and the vacuolar pyrophosphatase, coexist at membranes of the secretory pathway of plants. The V-ATPase is the dominant H(+)-pump at endomembranes of most plant cells, both in terms of protein amount and, frequently, also in

Paracrine signaling by glial cell-derived triiodothyronine activates neuronal gene expression in the rodent brain and human cells.
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Hypothyroidism in humans is characterized by severe neurological consequences that are often irreversible, highlighting the critical role of thyroid hormone (TH) in the brain. Despite this, not much is known about the signaling pathways that control TH action in the brain. What is known is that the

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pyrophosphatase/hypoxia

Low levels of pyrophosphate in transgenic potato plants expressing E. coli pyrophosphatase lead to decreased vitality under oxygen deficiency.

Vacuolar H(+)-translocating pyrophosphatase is induced by anoxia or chilling in seedlings of rice.

Expression of vacuolar H+-pyrophosphatase (OVP3) is under control of an anoxia-inducible promoter in rice.

Heterologous expression and purification of membrane-bound pyrophosphatases.

CtBP1 interacts with Ikaros and modulates pituitary tumor cell survival and response to hypoxia.

Preservation of complex I function during hypoxia-reoxygenation-induced mitochondrial injury in proximal tubules.

Nudix hydrolases with Coenzyme A (CoA) and acyl-CoA pyrophosphatase activities confer growth advantage to Mycobacterium smegmatis.

Anoxia-enhanced expression of genes isolated by suppression subtractive hybridization from pondweed (Potamogeton distinctus A. Benn.) turions.

Regulation of energy metabolism in macrophages during hypoxia. Roles of fructose 2,6-bisphosphate and ribose 1,5-bisphosphate.

Compartmentalization of adenosine metabolism in cancer cells and its modulation during acute hypoxia.

Acidosis-Induced Changes in Proteome Patterns of the Prostate Cancer-Derived Tumor Cell Line AT-1.

Significance of the V-type ATPase for the adaptation to stressful growth conditions and its regulation on the molecular and biochemical level.

Paracrine signaling by glial cell-derived triiodothyronine activates neuronal gene expression in the rodent brain and human cells.

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