On the nature of the transaldolase-dihydroxyacetone complex.
نویسندگان
چکیده
3 Bonsignore, A., S. Pontremoli, E. Grazi, and M. Mangiarotti, Biochem. Biophys. Research Communs., 1, 79 (1959). 4 Venkataraman, R., and E. Racker, J. Biol. Chem., 236, 1876 (1961). 5 Prandini, B. D., and J. A. Lopes do Rosario, Boll. soc. ial. biol. sper., 36, 1224 (1960). 6 Grazi, E., M. A. Mangiarotti, and S. Pontremoli, in press. 7 Bonsignore, A., S. Pontremoli, G. Fornaini, and E. Grazi, Ital. J. Biochem., 6, 241 (1957).
منابع مشابه
The Coupled Reaction Catalyzed by the Enzymes Transketolase and Transaldolase II. REACTION OF ERYTHROSE 4-PHOSPHATE A3D THE TRANSALDOLASE-DIHYDROXYACETONE COMPLEX*
The conversion of hexose monophosphate to sedoheptulose 7phosphate, first detected by Bonsignore et al. (1) in dialyzed liver extracts, and by Dische (2) in red cell hemolysates, can be attributed to the presence of transketolase and transaldolase in these extracts (3, 4). With highly purified preparations of transketolase and transaldolase, free of phosphoglucose isomerase and xylulose 5-phosp...
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The conversion of hexose monophosphate to sedoheptulose 7phosphate, first detected by Bonsignore et al. (1) in dialyzed liver extracts, and by Dische (2) in red cell hemolysates, can be attributed to the presence of transketolase and transaldolase in these extracts (3, 4). With highly purified preparations of transketolase and transaldolase, free of phosphoglucose isomerase and xylulose 5-phosp...
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The transaldolase-dihydroxyacetone carbanion intermediate formed in the reaction of transaldolase with its donor substrates fructose-6-P or sedoheptulose-7-P is susceptible to oxidation by hexacyanoferrate(III). The dihydroxyacetone moiety is oxidized to the corresponding 2-ketoaldehyde, i.e. hydroxy-pyruvaldehyde (CH2OH-CO-CHO). This oxidation product is, in contrast to dihydroxyacetone, readi...
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The transaldolase-dihydroxyacetone carbanion intermediate formed in the reaction of transaldolase with its donor substrates fructose-6-P or sedoheptulose-7-P is susceptible to oxidation by hexacyanoferrate(II1). The dihydroxyacetone moiety is oxidized to the corresponding 2-ketoaldehyde, i.e. hydroxypyruvaldehyde (CH,OH .CO ‘CHO). This oxidation product is, in contrast to dihydroxyacetone, read...
متن کاملFormation of unequally labeled fructose 6-phosphate by an exchange reaction catalyzed by transaldolase.
An increasing number of investigators (2-5) have postulated the occurrence of an exchange reaction catalyzed by transaldolase between glyceraldehyde S-phosphate and fructose 6phosphate to explain the unequal labeling of the 6 carbons of hexoses which is observed in tracer experiments. Transaldolase accepts the dihydroxyacetone moiety from sedoheptulose 7-phosphate or fructose B-phosphate to for...
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ورودعنوان ژورنال:
- Proceedings of the National Academy of Sciences of the United States of America
دوره 47 شماره
صفحات -
تاریخ انتشار 1961