Biosynthesis of vitamin B12: use of specific 13C-labelling for structural studies on factor IV
作者:Alex I. D. Alanine、Koji Ichinose、Denis Thibaut、Laurent Debussche、N. Patrick、J. Stamford、Finian J. Leeper、Francis Blanche、Alan R. Battersby
DOI:10.1039/c39940000193
日期:——
[1,10,20-13C3]Uro'gen III is unambiguously synthesised for enzymic conversion into precorrin-4 isolated after aerial oxidation as two epimers of Factor IV, the 13C NMR spectra of which rigorously confirm the presence of a C-1 acetyl group in precorrin-4; attachment of the fourth methyl group at C-17 of precorrin-4 is also confirmed by related 13C-labelling experiments.
[1,10,20- 13 C 3 ] Uro'gen III是明确合成的,用于酶转化为空气氧化后分离的precorrin-4,为因子IV的两个差向异构体,其13 C NMR光谱严格确认存在C precorrin-4中的-1乙酰基; 相关的13 C标记实验也证实了precorrin-4的C-17处的第四甲基的附着。