Biosynthesis of D- and L- glycero- L- galacto-octulose from pentoses and hexoses

D- glycero- L- galacto-Octulose and L- glycero- L- galacto-octulose accumulated when leaves of Kenland red clover ( Trifolium pratense) were allowed to imbibe solutions of D-gulose or D-xylose and L-mannose or L-arabinose, respectively. The octuloses were isolated and identified by paper chromatogra...

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Bibliographic Details
Published in:Carbohydrate research 1975, Vol.39 (1), p.125-129
Main Authors: Haustveit, Guri, McComb, Elizabeth A., Rendig, Victor V.
Format: Article
Language:English
Subjects:
Chromatography, Paper
Hexoses - metabolism
Ketoses - biosynthesis
Molecular Conformation
Pentoses - metabolism
Plants - metabolism
Stereoisomerism
Transaldolase - metabolism
Transketolase - metabolism
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Summary:D- glycero- L- galacto-Octulose and L- glycero- L- galacto-octulose accumulated when leaves of Kenland red clover ( Trifolium pratense) were allowed to imbibe solutions of D-gulose or D-xylose and L-mannose or L-arabinose, respectively. The octuloses were isolated and identified by paper chromatography and by oxidative degradations to the corresponding lower sugars. Assignments of the D and L configuration were made on the basis of optical rotation. It is suggested that formation of the octuloses from the hexoses and pentoses is mediated through transketolase and aldolase or transaldolase catalysis, respectively.
ISSN:0008-6215
1873-426X
DOI:10.1016/S0008-6215(00)82644-0