Sulphite oxidation by a plant mitochondrial system

Tager, J. M.; Rautanen, Niilo

doi:10.1016/0006-3002(55)90014-7

Cited by 30 publications

(4 citation statements)

References 10 publications

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“…All the evidence available indicates that sulfite is an intermediate in the oxidation of thiosulfate (and other reduced sulfur compounds) and is oxidized to sulfate by a phosphorylative pathway rather than by the sulfite oxidase described in mammalian tissue. An effect of AMP on the oxidation of sulfite was observed previously in plants, but neither phosphorylation or APS formation was reported (123). Although sulfite can be produced from the reductive cleavage of thiosulfate, it is possible that sulfite can be formed by other mechanisms, namely, the postulated polythionate cycle (65).…”

Section: ] 83mentioning

confidence: 85%

V. Comparative Metabolism of Inorganic Sulfur Compounds in Microorganisms

Peck

1962

Bacteriological Reviews

111

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Section: ] 83mentioning

confidence: 85%

V. Comparative Metabolism of Inorganic Sulfur Compounds in Microorganisms

Peck

1962

Bacteriological Reviews

111

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“…Undoubtedly, part of the sulfite is directly oxidized according to the redox conditions prevailing in the cell. A sulfite oxidase was found in plant mitochondria (TAGER and RAUTANEN 1955). It needs Mg++ and cytochrome c for activity, but we do not know to which extent it participates in sulfite oxidation in the leaf.…”

Section: C) Sulfite Metabolism and Transportmentioning

confidence: 96%

The effect of SO2 pollution on plant metabolism

Ziegler¹

1975

Residue Reviews

140

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Contents I. Introduction _____________________________________________________ 79 II. Fate of SO. in the plant __________________________________________ 81 a) llptake of SO. ________________________________________________ 81 b) Dissolution of SO. ____________________________________________ 83 c) Sulfite metabolism and transport ________________________________ 84 d) Distribution of the incorporated sulfur in the plant ________________ 86 e) Accumulation of sulfur compounds ______________________________ 86 f) Nutritive effect of low doses of SO. ____________________________ 87 III. Damaging effect on plant metabolism ______________________________ 87 a) Effect on transpiration, respiration, and photosynthesis ____________ 87 b) Effect on enzymes and coenzymes ______________________________ 89 IV. Damaging effect on plant composition and plant structure ____________ 93 a) Changes in the amount of plant constituents ______________________ 93 h) Effect on submicroscopic and microscopic structure _______________ 94 c) Visible damage _______________________________________________ 95 V. ModiJication of the damaging effect ________________________________ 95 a) Species and race differences ____________________________________ 95 b) Influence of external factors ____________________________________ 97 c) Effect of internal factors _______________________________________ 97 d) Synergistic effect of air polluting gases __________________________ 98 VI. Conclusions ______________________________________________________ 98 Summary _____________________________________________________________ 99 References ____________________________________________________________ 99

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“…The quantitative nature of the activation of amino acid decarboxylations by AMP-5' is comparable with other enzymes recently found to be activated by this nucleotide. For example, Tager & Rautanen (1955) found that the degree of stimulation by AMP-5' of sulphite oxidation in oat mitochondria was a function of the AMP-5' concentration. Madsen & Cori (1955) found that muscle phosphorylase a binds 4 moles of AMP-5'/mole of protein and phosphorylase b binds 2 moles of AMP-5'/mole of protein, and that whereas the b enzyme has an absolute requirement for AMP-5', the a enzyme is still 65 % active in its absence.…”

Section: Activation Of Amino Acid Decarboxylasesmentioning

confidence: 99%

The effects of phosphates, arsenates and nucleotides on l-amino acid decarboxylases

Eggleston

1957

Biochemical Journal

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Gale & Epps (1944) and Gale (1945) observed that the lysine decarboxylase activity of Eseherichia coli '86' was increased by inorganic phosphate (0.1-0-5M), and that the decarboxylation of ornithine by Clo8tridium septiurm was more rapid in phosphate buffers than in citrate buffers of comparable pH. Krebs, Eggleston & Knivett (1955) recently confirmed that the decarboxylation of L-omithine and L-lysine by E8ch. coli was accelerated by the addition of phosphate at pH 6-56-8. The present paper is concerned with a more detailed study of the effects of inorganic and organic phosphates and related substances on the activity of amino acid decarboxylases. EXPERIMENTAL Material8Buffers. The following buffers were used: phosphate, made froin molar stock solutions ofNa3HPO4 and NaH2PO4; arsenate, made from 0 5M-Na2HAsO4 and N-HCI; citrate made from 0-2M sodium citrate and N-HCI or N-NaOH; tris, made from m aminotrishydroxymethylmethane and N-HCI; acetate, made from sodium acetate and acetic acid; acetate-veronal (Michaelis, 1931), and tris-maleate (Gomori, 1955). A glass electrode and a Pye pH meter were used to measure the pH of these buffers after dilution to the concentrations used in experiments. The additions of enzyme and substrates had little or no effect on the pH.

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Sulphite oxidation by a plant mitochondrial system

Cited by 30 publications

References 10 publications

V. Comparative Metabolism of Inorganic Sulfur Compounds in Microorganisms

V. Comparative Metabolism of Inorganic Sulfur Compounds in Microorganisms

The effect of SO2 pollution on plant metabolism

The effects of phosphates, arsenates and nucleotides on l-amino acid decarboxylases

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