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Aldolase-catalysed Formation of D-glycero-d-manno-octulose from D-ribose and D-fructose 1,6-Diphospate by Guri Haustveit is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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Jones and Sephtonl demonstrated the formation of four octuloses from pentoses and D-fructose 1.6~diphosphate by aldolase catalysis. The octuloses retained the cotiguration of the original pentoses at C-5,6,7 and had the D-th-eo cotiguration at C-3,4. The formation of octuloses from pentoses in plants has also been de-monstrated2m3, and it was suggested that either aldolose or transaldolase is the enzyme catalyzing the condensation. On preparing D-glycero-D-oltro-octulose from D-ribose and D-fructose by the method of Jones and Sephton', it was noticed that, in addition to the expected octulose, another compound was formed, which gave a colour with orcinol characteristic for octuloses2. This note describes the isolation and identification of the unknown octulose. Afier treatment with phosphatase, fermentation, and preparative p-c., the octulose (3.7 mg), when isolated from an incubate of D-ribose, D-fructose 1,6diphosphate, and aldolase (EC 4.1.2.13), had [a]n + 22" (c 0.2, water), and the same mobility in p.c. as D-glycero-D-manno-octulose (RFRu 0.38 and 0.65, solvents A and B, respectiveiy). Oxidation of the octulose with lead tetra-acetate4 gave ribose, and periodate oxidation of

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Author

Guri Haustveit

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0008-6215)

Published

1976

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)