Crout DH, Hedgecock CJ, Lipscomb EL, Armstrong FB. Stereochemistry of valine biosynthesis. Configuration of the product of rearrangement of alpha-acetolactate.
EUROPEAN JOURNAL OF BIOCHEMISTRY 1980;
110:439-44. [PMID:
7002550 DOI:
10.1111/j.1432-1033.1980.tb04885.x]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
When alpha-aceto[1,3,5-13C3]lactate (2-hydroxy-2-methyl-3-oxo[1,3,5-13C3]butanoate) was incubated with a cell-free system prepared from Salmonella typhimurium, the valine produced was labelled in the C-4 pro-S position. This result proves that during the tertiary ketol rearrangement catalysed by the reductoisomerase of the isoleucine-valine pathway, the methyl group transfer is to the re face of the trigonal centre at C-3 of alpha-acetolactate.
Collapse