Expression of genes involved in redox homeostasis and antioxidant defense in a marine macroalga Ulva fasciata by excess copper

Wu, Tzong‐Ming; Hsu, Yuan-Ting; Sung, Ming-Shiuan; Hsu, Yi-Ting; Lee, Tse‐Min

doi:10.1016/j.aquatox.2009.07.010

Cited by 31 publications

(18 citation statements)

References 42 publications

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“…These findings concurred with previous results (Georg and Gomes, 2007;Wu et al, 2009); for example, changes in the transcription of CYP were observed in the marine macroalgae U. fasciata due to exposure to excess copper, and an increase in the CYP transcript was observed in copper-and cadmium-treated Blastocladiella emersonii. Up-regulation of CYP expression during metal exposure has also been reported in yeast and earthworm (Kim et al, 2010).…”

Section: Discussionsupporting

confidence: 94%

A novel cyclophilin gene from the dinoflagellate Prorocentrum minimum and its possible role in the environmental stress response

Ponmani

Guo

2015

Chemosphere

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Section: Discussionsupporting

confidence: 94%

A novel cyclophilin gene from the dinoflagellate Prorocentrum minimum and its possible role in the environmental stress response

Ponmani

Guo

2015

Chemosphere

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“…In the cases of ocean outfall, they may even abruptly exposed to high levels of metals. In the study of short- and long-term response of the marine green macroalga Ulva fasciata to Cu excess, regulation of mRNA expression involved in redox homeostasis and antioxidant defense were different [6]. In another study, distinct changes in the antioxidant responses to acute or chronic treatment with Cu were observed in the unicellular alga Gonyaulax polyedra , suggesting a different oxidative status of these two types of metal stresses [7].…”

Section: Introductionmentioning

confidence: 99%

Behavior of the Edible Seaweed Sargassum fusiforme to Copper Pollution: Short-Term Acclimation and Long-Term Adaptation

et al. 2014

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Aquatic agriculture in heavy-metal-polluted coastal areas faces major problems due to heavy metal transfer into aquatic organisms, leading to various unexpected changes in nutrition and primary and/or secondary metabolism. In the present study, the dual role of heavy metal copper (Cu) played in the metabolism of photosynthetic organism, the edible seaweed Sargassum fusiforme, was evaluated by characterization of biochemical and metabolic responses using both 1H NMR and GC-MS techniques under acute (47 µM, 1 day) and chronic stress (8 µM, 7 days). Consequently, photosynthesis may be seriously inhibited by acute Cu exposure, resulting in decreasing levels of carbohydrates, e.g., mannitol, the main products of photosynthesis. Ascorbate may play important roles in the antioxidant system, whose content was much more seriously decreased under acute than that under chronic Cu stress. Overall, these results showed differential toxicological responses on metabolite profiles of S. fusiforme subjected to acute and chronic Cu exposures that allowed assessment of impact of Cu on marine organisms.

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“…In general, their primary sequences are highly conserved, i.e., they all possess plant‐specific TP and EP 24. Recently, ferritin genes have been identified and characterized not only from land plants, such as monocots or dicots, but also from algae 25–29. Among them, green algae have plant‐ferritin‐like molecules,28, 29 whereas ferritin from cyanobacteria and diatoms have diverged sequences, which are rather similar to bacterioferritin (Bfr) 25–27.…”

Section: Introductionmentioning

confidence: 99%

The extension peptide of plant ferritin from sea lettuce contributes to shell stability and surface hydrophobicity

et al. 2012

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Plant ferritins have some unique structural and functional features. Most of these features can be related to the plant-specific ''extension peptide" (EP), which exists in the Nterminus of the mature region of a plant ferritin. Recent crystallographic analysis of a plant ferritin revealed the structure of the EP, however, two points remain unclear: (i) whether the structures of well-conserved EP of plant ferritins are common in all plants, and (ii) whether the EP truly contributes to the shell stability of the plant ferritin oligomer. To clarify these matters, we have cloned a green-plant-type ferritin cDNA from a green alga, Ulva pertusa, and investigated its crystal structure. Ulva pertusa ferritin (UpFER) has a plant-ferritin-specific extension peptide composed of 28 amino acid residues. In the crystal structure of UpFER, the EP lay on and interacted with the neighboring threefold symmetry-related subunit. The amino acid residues involved in the interaction were very highly conserved among plant ferritins. The EPs masked the hydrophobic pockets on the ferritin shell surface by lying on them, and this made the ferritin oligomer more hydrophilic. Furthermore, differential scanning calorimetric analysis of the native and its EP-deletion mutant suggested that the EP contributed to the thermal stability of the plant ferritin shell. Thus, the shell stability and surface hydrophobicity of plant ferritin were controlled by the presence or absence of the plant-ferritin-specific EP. This regulation can account for those processes such as shell stability, degradation, and association of plant ferritin, which are significantly related to iron utilization in plants.

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Expression of genes involved in redox homeostasis and antioxidant defense in a marine macroalga Ulva fasciata by excess copper

Cited by 31 publications

References 42 publications

A novel cyclophilin gene from the dinoflagellate Prorocentrum minimum and its possible role in the environmental stress response

A novel cyclophilin gene from the dinoflagellate Prorocentrum minimum and its possible role in the environmental stress response

Behavior of the Edible Seaweed Sargassum fusiforme to Copper Pollution: Short-Term Acclimation and Long-Term Adaptation

The extension peptide of plant ferritin from sea lettuce contributes to shell stability and surface hydrophobicity

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