The regulation of ribose-5-phosphate isomerisation inEscherichia coliK12
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چکیده
منابع مشابه
Differentiation between ribose-3-phosphate and ribose-5-phosphate by means of the orcinol-pentose reaction.
During a study of the energy-rich phosphorus compounds of higher plants, it became necessary to differentiate between ribose-3-phosphate and ribosed-phosphate. The only method available for distinguishing between these esters at low levels (quantities of 1 mg. or less) is that of Levene and Stiller (1). This method depends on the difference in the rate at which these compounds release their pho...
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A patient with a lysosomal storage disease, progressive neurologic degeneration, and renal failure was found to have accumulated a low molecular weight nin-hydrin and phenol-HzS04 reactive compound. Amino acid analysis and gas chromatography-mass spectrometry identified a glutamic acid moiety. Direct insertion mass spectrometry proved the carbohydrate portion to be a sugar phosphate. NaB3H4 red...
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olizing this substrate in the presence of ATP1 to form a mixture of n-ribose 5-phosphate and n-ribulose 5-phosphate. Although neither n-xylose 5-phosphate nor n-xylulose 5-phosphate was found, these authors postulated the latter as an intermediate upon the observation that n-xylulose was phosphorylated more rapidly than n-xylose. n-Xylulose 5-phosphate was first isolated and identified as a pro...
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Because ribose-5-phosphate (R-5-P) and sedoheptulose-7-phosphate (S-7-P) have been found free in cells of the axotobacter, the mechanism of synthesis of these compounds was sought. Previously, Horecker (1) and Wood and Schwerdt (2) demonstrated in yeast and Pseudomonas Jluorestens that S-7-P was produced from R-5-P by an enzyme called transketolase. The R-5-P was first converted by an isomerase...
متن کاملInhibition of ribose-5-phosphate isomerase by 4-phosphoerythronate.
Hoping to exploit the special affinity of enzymes for unstable intermediates in substrate transformation, we have determined the effectiveness of possible analogs of ene-diolate intermediates as inhibitors of spinach ribose-5-phosphate isomerase. 4-Phosphoerythronic acid was found to be a very strong competitive inhibitor, with a Ki value almost 3 orders of magnitude lower than the Km value of ...
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ژورنال
عنوان ژورنال: FEBS Letters
سال: 1971
ISSN: 0014-5793
DOI: 10.1016/0014-5793(71)80202-8