Biosynthesis of superoxide dismutase in eight prokaryotes: Effects of oxygen, paraquat and an iron chelator

Schiavone, Joan R.

doi:10.1016/0378-1097(87)90494-0

Cited by 6 publications

(8 citation statements)

References 9 publications

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“…The observed increase in synthesis of SOD, catalase, and peroxidase in E. coli in response to O 2 was similar to that reported previously for E. coli (21,23,24), as well as other bacteria (41). In order to examine the possibility of similar enzyme induction in B. burgdorferi, it was first necessary to identify a range of DOCs which would support borrelial growth.…”

supporting

confidence: 83%

Identification of superoxide dismutase activity in Borrelia burgdorferi

1997

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supporting

confidence: 83%

Identification of superoxide dismutase activity in Borrelia burgdorferi

1997

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“…All these events probably resulted from an overproduction of 0; in stressed germinating seeds, which may be the major cawe of poor germination. SOD is induced in the presence of superoxide-generating compounds such as paraquat and jug lone in prokaryotes (Shiavone and Hassan, 1987) as well as in higher plants (Matters and Scandalios, 1986). The observed SOD activation upon imbibition in low-viability seeds, is probably directly related to the increased production of O;, which may also lead to the inhibition of catalase activity (Kono and Fridovich, 1982) and to the oxidation of endogenous cytohnin as suggested by our in vitro data.…”

Section: Discussionsupporting

confidence: 57%

Accumulation of Reactive Oxygen Species and Oxidation of Cytokinin in Germinating Soybean Seeds

Gidrol

Lin

Dégousée

et al. 1994

European Journal of Biochemistry

106

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Seed germination is an important developmental switch when quiescent seed cells initiate oxidative phosphorylation for further development and differentiation. During early imbibition of soybean seeds (Glycine m a L. cv. Weber), a superoxide dismutase (SOD) activity peak was observed, in embryonic axes, after 6 h imbibition. Peroxidase activities, including catalase, were significantly increased after 12 h imbibition and during germination phase 111. Catalase was the most efficient enzyme in catabolizing H,O, in embryonic axes. When stored at 42°C and 100% relative humidity, seeds were stressed and lost their viability in a time-dependent manner. A significant increase in the Cu, Zn-superoxide-dismutase activity, and to a lesser extent, Mn superoxide dismutase activity was observed during germination in low-viability (stressed) seeds as compared to high-viability (unstressed) seeds. Northern blot analysis confirmed that superoxide dismutase induction resulted from an accumulation of its transcripts in response to the production of 0;. The induction of catalase did not occur in low-viability seeds, resulting in dramatic accumulation of H,O,. Using capillary electrophoresis, HPLC and NMR we found that the endogenous cytokinin, zeatin riboside, was present in large quantities in the high-viability seeds, but it was oxidized into adenine in the low-viability seeds. In vitro superoxide anion could also oxidize the cytokinin. Zeatin riboside, but not adenine, was found to act as a scavenger of superoxide anions and may help to maintain seed viability by detoxifying reactive oxygen species. Germination of stressed seeds was partially restored by the addition of exogenous cytokinin (zeatin riboside). Protection against oxidative stress by cytokinin seemed to be a general phenomenon, as Escherichia coli cells were also protected against superoxide stress in the presence of cytokinin.Seed germination can be separated into three distinct phases (Bewley and Black, 1985). In phase I, both oxygen uptake and seed-mass increase; phase I1 is characterized by a metabolic plateau with a stable oxygen uptake and seed mass increase; in phase I11 the germination process is completed with a marked increase in oxygen uptake associated with radicle protrusion. Reactive oxygen species (ROS) arise as by-products of oxidative phosphorylation. ROS are key compounds in the etiology of numerous diseases in human beings (Halliwell and Gutteridge, 1990) and in some stress situations in plants ( Thompson et al., 1987). To limit the damage caused by deleterious oxygen species, aerobic organisms maintain a battery of repair and protective enzymes. These include superoxide dismutase (SOD), which scavenges the toxic superoxide radical, and catalase, ascorbate peroxidase and glutathione peroxidase, which catalyze the decomposition of H,O,. The production of ROS increases under Correspondence to A. Kush,

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“…1 and 2), showing an initial increase in CA activity at salt concentrations around 3%, followed by a decline in CA activity at the higher salt concentrations tested. SOD, which is an enzyme found in aerobic bacteria and in some anaerobic bacteria, detoxifies 02-A number of investigators have found that when cells of SOD-producing bacteria are exposed to increased levels of O, induction of manganese-containing SOD and, to a lesser extent, CA occurs (22,23,27). L. nionocvtogenes possesses a manganese-containing SOD that is inducible when exposed to elevated levels of 02 in the growth medium (22).…”

Section: Discussionmentioning

confidence: 99%

Catalase, superoxide dismutase, and hemolysin activities and heat susceptibility of Listeria monocytogenes after growth in media containing sodium chloride

Dallmier

Martin

1990

Appl Environ Microbiol

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The activities of catalase, superoxide dismutase, and a thiol-activated hemolysin produced by four strains of Listeria monocytogenes propagated in media containing various concentrations of sodium chloride were examined. L. monocytogenes 7644 showed an increase in catalase, superoxide dismutase, and thiol-activated hemolysin activities when grown in a medium containing 2.5% (wt/vol) NaCI followed by a decrease in activities when propagated in media containing salt concentrations higher than 2.5%. L. monocytogenes LCDC 81-861 demonstrated enhanced catalase activity when grown in media containing NaCI ranging from 1.5 to 4.6% and increased superoxide dismutase activity when propagated in media containing 1.5 to 3.5% NaCl. L. monocytogenes LCDC 81-861 did not exhibit any detectable hemolysin activity under the conditions tested. After growth in various NaCI-containing media, both strains were subjected to sublethal heat injury for 30 min at 55°C. L. monocytogenes LCDC 81-861 showed increased sensitivity to the heat treatment when grown in media containing 4.6 and 6.5% NaCI, whereas L. monocytogenes 7644 did not exhibit enhanced heat lability.

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Biosynthesis of superoxide dismutase in eight prokaryotes: Effects of oxygen, paraquat and an iron chelator

Cited by 6 publications

References 9 publications

Identification of superoxide dismutase activity in Borrelia burgdorferi

Identification of superoxide dismutase activity in Borrelia burgdorferi

Accumulation of Reactive Oxygen Species and Oxidation of Cytokinin in Germinating Soybean Seeds

Catalase, superoxide dismutase, and hemolysin activities and heat susceptibility of Listeria monocytogenes after growth in media containing sodium chloride

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