d ribulose/spinacia oleracea

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D-Ribulose-5-phosphate 3-epimerase: cloning and heterologous expression of the spinach gene, and purification and characterization of the recombinant enzyme.

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We have achieved, to our knowledge, the first high-level heterologous expression of the gene encoding D-ribulose-5-phosphate 3-epimerase from any source, thereby permitting isolation and characterization of the epimerase as found in photosynthetic organisms. The extremely labile recombinant spinach

Cloning of the amphibolic Calvin cycle/OPPP enzyme D-ribulose-5-phosphate 3-epimerase (EC 5.1.3.1) from spinach chloroplasts: functional and evolutionary aspects.

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Exploiting the differential expression of genes for Calvin cycle enzymes in bundle-sheath and mesophyll cells of the C4 plant Sorghum bicolor L., we isolated via subtractive hybridization a molecular probe for the Calvin cycle enzyme D-ribulose-5-phosphate 3-epimerase (R5P3E)(EC 5.1.3.1), with the

Purification, properties and in situ localization of the amphibolic enzymes D-ribulose 5-phosphate 3-epimerase and transketolase from spinach chloroplasts.

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The amphibolic enzymes D-ribulose 5-phosphate 3-epimerase and transketolase have been purified from stroma extracts of spinach chloroplasts using ammonium sulfate fractionation and FPLC. For the native enzymes, a molecular mass of 180 kDa for epimerase and 160 kDa for transketolase was found and the

Orderly disposition of heterogeneous small subunits in D-ribulose-1,5-bisphosphate carboxylase/oxygenase from spinach.

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We determined the crystal structure of spinach ribulose-1, 5-bisphosphate carboxylase/oxygenase (Rubisco) by x-ray diffraction at 1.8-A resolution and found that the enzyme contained two kinds of S, SI and SII, present in equal number and disposed in an orderly way within the Rubisco holoenzyme. The

A fluorimetric differentiation of the binding sites of the D-ribulose 1,5-bisphosphate carboxylase/oxygenase from spinach from pyridoxal 5'-phosphate.

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Identification of two binding sites of the D-ribulose 1,5-bisphosphate carboxylase/oxygenase from spinach for D-ribulose 1,5-bisphosphate and effectors of the carboxylation reaction.

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A fluorimetric study of substrate and effector binding of D-ribulose-1,5-biphosphate carboxylase/oxygenase from spinach.

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Identification of a catalytic aspartyl residue of D-ribulose 5-phosphate 3-epimerase by site-directed mutagenesis.

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Guided by comparative sequence considerations, we have examined the possibility of a catalytic role of Asp186 of D-ribulose 5-phosphate epimerase by site-directed mutagenesis of the recombinant spinach enzyme. Accordingly, D186A, D186N, and D186E mutants of the epimerase were constructed, purified,

Dissociation of ribulose-1,5-bisphosphate carboxylase/oxygenase from spinach by urea.

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The dissociation of D-ribulose-1,5-bisphosphate carboxylase/oxygenase from spinach, which consists of eight large subunits (L, 53 kDa) and eight small subunits (S, 14 kDa) and thus has a quarternary structure L8S8, has been investigated using a variety of physical techniques. Gel chromatography

Immobilization of D-ribulose-1,5-bisphosphate carboxylase/oxygenase: a step toward carbon dioxide fixation bioprocess.

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Immobilization of D-ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) from spinach leaves is described. This enzyme enables the fixation of carbon dioxide on a five-carbon sugar D-ribulose-1,5-bisphosphate (RuBP). Two different immobilization methods were employed: dicyclohexylcarbodiimide

Rubiscolin-6, a δ-Opioid Peptide from Spinach RuBisCO, Exerts Antidepressant-Like Effect in Restraint-Stressed Mice.

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Rubiscolin-6 (Tyr-Pro-Leu-Asp-Leu-Phe) is produced by a pepsin digest of spinach d-ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) and known to act as an agonist on δ-opioid receptor. Here, we showed that administration of rubiscolin-6 reduced immobility time in the tail suspension test in

Rubiscolin-6, a delta opioid peptide derived from spinach Rubisco, has anxiolytic effect via activating sigma1 and dopamine D1 receptors.

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Rubiscolin-6 (Tyr-Pro-Leu-Asp-Leu-Phe) is a delta opioid peptide derived from the large subunit of spinach d-ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco). We previously reported that rubiscolin-6 had an analgesic effect and stimulated memory consolidation. Here we show that

The Association of d-Ribulose- 1,5-Bisphosphate Carboxylase/Oxygenase with Phosphoribulokinase.

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When Ribulose- 1,5-bisphosphate carboxylase/oxygenase was purified from spinach leaves (Spinacia oleracea) using precipitation with polyethylene glycol and MgCl(2) followed by DEAE cellulose chromatography, 75% of phosphoribulokinase and 7% of phosphoriboisomerase activities copurified with

Different molecular forms of D-ribulose-1,5-bisphosphate carboxylase from Rhodopseudomonas sphaeroides.

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Ribulose-1,5-bisphosphate (Rbu-P2) carboxylase isolated from Rhodopseudomonas sphaeroides 2.4.1.Ga was separated into two different forms by DEAE-cellulose column chromatography. Both forms, designated Peak I and Peak II have been purified to homogeneity by the criterion of polyacrylamide disc-gel

Determining RuBisCO activation kinetics and other rate and equilibrium constants by simultaneous multiple non-linear regression of a kinetic model.

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The forward and reverse rate constants involved in carbamylation, activation, carboxylation, and inhibition of D-ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) have been estimated by a new technique of simultaneous non-linear regression of a differential equation kinetic model to multiple

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