焦磷酸对光合作用电子传递反应的影响。
Effect of pyrophosphate on photosynthetic electron transport reactions.
机构信息
Laboratory of Plant Physiology, Istituto Botanico dell'Universita Via Amendola 175, Bari, Italy.
出版信息
Plant Physiol. 1969 Nov;44(11):1511-4. doi: 10.1104/pp.44.11.1511.
Abstract
Inorganic pyrophosphate is found to inhibit the ferredoxin-dependent photoreduction of NADP by isolated chloroplasts. The reduction of ferricyanide is not inhibited, nor is the activity of photosystem 1 as measured with methyl viologen as the electron acceptor. All other ferredoxin-depended reactions are inhibited, such as cytochrome c photoreduction and the reaction sequence: NADPH -->Flavoprotein-->ferredoxin-->cytochrome c. The inhibition by pyrophosphate is, in all cases, competitive with ferredoxin and independent of NADP concentration. Pyrophosphate inhibition of the formation of the ferredoxin-flavoprotein complex is demonstrated spectrophotometrically.
摘要
无机焦磷酸被发现可抑制叶绿体的铁氧还蛋白依赖的 NADP 光还原。铁氰化物的还原不受抑制，用亚甲蓝作为电子受体测量的光合系统 1 的活性也不受抑制。所有其他的铁氧还蛋白依赖的反应都被抑制，如细胞色素 c 的光还原和反应序列：NADPH -->黄素蛋白-->铁氧还蛋白-->细胞色素 c。焦磷酸对铁氧还蛋白的抑制在所有情况下都是与铁氧还蛋白竞争的，并且与 NADP 浓度无关。焦磷酸抑制铁氧还蛋白-黄素蛋白复合物的形成可通过分光光度法证明。
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本文引用的文献
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Photosynthetic phosphorylation in the absence of redox dyes: oxygen and ascorbate effects.无氧化还原染料时的光合磷酸化：氧和抗坏血酸的影响
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Complex formation between ferredoxin triphosphopyridine nucleotide reductase and electron transfer proteins.铁氧化还原蛋白三磷酸吡啶核苷酸还原酶与电子传递蛋白之间的复合物形成。
J Biol Chem. 1969 Feb 10;244(3):964-70.
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The stoichiometry of NADP dependent photosynthetic phosphorylation.NADP 依赖性光合磷酸化的化学计量学。
Biochem Biophys Res Commun. 1968 Sep 30;32(6):1020-4. doi: 10.1016/0006-291x(68)90131-9.
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On the structure and function of reduced nicotinamide adenine dinucleotide phosphate-cytochrome f reductase of spinach chloroplasts.菠菜叶绿体中还原型烟酰胺腺嘌呤二核苷酸磷酸 - 细胞色素f还原酶的结构与功能
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Photosynthesis by isolated chloroplasts. II. Effects of addition of cofactors and intermediate compounds.离体叶绿体的光合作用。II. 辅因子和中间化合物添加的影响。
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