Abstract
The metabolic fate of the pro- R and pro- S hydrogens at the sn-C-3 position of glycerol during the formation of 4-dehydroacaterin has been investigated using Pseudomonas sp. A92. Feeding studies of sn-(3 R)- and sn-(3 S)-(3- 2H)glycerols revealed that 5 E hydrogen of 4-dehydraocaterin originates mainly from pro-R hydrogen at sn-C-3 of glycerol, while 5 Z hydrogen comes mainly from pro-S. These results ruled out pyruvate and lactate as the immediate precursor of the C 3 branched unit of acaterin, and suggest 1,3-bisphosphoglyceric acid or its biological equivalent as the precursor.
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