Loss of Hydrogen from Dihydroxyacetone Phosphate during Glyceryl Ether Synthesis

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Loss of hydrogen from dihydroxyacetone phosphate during glyceryl ether synthesis.

In order to obtain information on the mechanism of ether bond formation in the synthesis of 0-alkyl lipids, a study was carried out to determine if there is a loss of hydrogen from carbon 3 of dihydroxyacetone phosphate (DHAP) (nonphosphorus-linked carbon) in the course of its incorporation into glyceryl ethers. Accordingly, a mixture of [1,3-3H2] DHAP and [I ,3-WJDHAP was prepared. In a micros...

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Biosynthesis of alkyl-ether containing lipid from dihydroxyacetone phosphate.

A lipid, stable to alkaline methanolysis, is formed when liver mitochondria or brain microsomes are incubated with dihydroxyacetone phosphate, long chain alcohol, ATP, CoA, NaF and Mg*. The lipid has been identified as alkyl dihydroxyacetone phosphate. This lipid is reduced by NADPH to 1-alkyl glycerol3-phosphate and is further acylated to form 1-alkyl 2-acyl glycerol-3-phosphate. The ether-con...

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Glyceryl ether synthesis from long chain alcohols in elasmobranch stomach.

1. The isolated stomachs of the dogfish, Squdus acanthias, and the skate, Raja erinacea, were found to incorporate long chain alcohols and acetate, but not long chain fatty acids, into glyceryl ethers. 2. The criterion for evaluation of incorporation of radioactive substrates into glyceryl ethers was the measurement of activity of individual isopropylidene derivatives separated by means of gas-...

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Hydrogen exchange in the formation of dihydroxyacetone phosphate from acyl dihydroxyacetone phosphate in O-alkyl lipid synthesis in Ehrlich ascites tumor cell microsomes.

We have previously presented evidence that acyl dihydroxyacetone phosphate is converted to O-alkyl dihydroxyacetone phosphate via an endiol intermediate which then accepts a fatty alcohol to form O-alkyl dihydroxyacetone phosphate. We have further proposed that, in the absence of fatty alcohol, the endiol derivative of acyl dihydroxyacetone phosphate reacts with water to form dihydroxyacetone p...

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Exclusive localization in peroxisomes of dihydroxyacetone phosphate acyltransferase and alkyl-dihydroxyacetone phosphate synthase in rat liver.

Dihydroxyacetone phosphate acyl transferase (DHAP-AT), alkyl dihydroxyacetone phosphate synthase (alkyl-DHAP-synthase), and glycerol-3-phosphate acyltransferase (GPAT) activities were investigated under optimal assay conditions using highly purified organelle preparations. The data presented clearly indicate that GPAT activity was mainly localized in mitochondria and microsomes, whereas DHAP-AT...

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ژورنال

عنوان ژورنال: Journal of Biological Chemistry

سال: 1971

ISSN: 0021-9258

DOI: 10.1016/s0021-9258(18)61879-4