Thiamine biosynthesis in yeast—evaluation of 4-hydroxy-5-hydroxymethyl-2-methylpyrimidine as a precursor
作者:Robert L. Baxter、A. Bryan Hartley、Henry W. S. Chan
DOI:10.1039/p19900002963
日期:——
The putative role of 4-hydroxy-5-hydroxymethyl-2-methylpyrimidine 2 as a late precursor in the biosynthesis of thiamine 1 by Saccharomyces cerevisiae has been examined using the deuteriated derivative 2a. To enable measurement of deuterium incorporation into the pyrimidine ring fragment of 1, a procedure for the degradation of 1 to the aniline derivative 6 using thiaminase I from Bacillus thiaminolyticus
4-羟基-5-羟甲基-2-甲基嘧啶的推定作用2中的硫胺生物合成后期的前体1由酿酒酵母一直使用氘代衍生物检查2a中。为了能够测量氘掺入1的嘧啶环片段中,已经开发了使用来自解氨化芽孢杆菌的硫胺素I将1降解为苯胺衍生物6的方法。虽然将4-氨基-2-甲基-5-羟基[ 2 H 1 ]甲基嘧啶3a掺入硫胺素中,但氘是由羟基嘧啶制成的2a未明显结合,表明化合物2的胺化不是嘧啶环生物合成的后期步骤。