A “Radical Dance” in Thiamin Biosynthesis: Mechanistic Analysis of the Bacterial Hydroxymethylpyrimidine Phosphate Synthase
作者:Abhishek Chatterjee、Amrita B. Hazra、Sameh Abdelwahed、David G. Hilmey、Tadhg P. Begley
DOI:10.1002/anie.201003419
日期:2010.11.8
Tricky things with ThiC: Hydroxymethylpyrimidine phosphate (HMP‐P) synthase (ThiC) catalyzes one of the most complex rearrangement reactions in primary metabolism. Deuteration experiments show that under reducing conditions, in the presence of aminoimidazole ribonucleotide, the 5′‐deoxyadenosyl radical generated at the active site of ThiC reacts directly with the substrate and performs two iterative
ThiC 的棘手问题:羟甲基嘧啶磷酸 (HMP-P) 合酶 (ThiC) 催化初级代谢中最复杂的重排反应之一。氘化实验表明,在还原条件下,在氨基咪唑核糖核苷酸的存在下,在 ThiC 活性位点产生的 5'-脱氧腺苷自由基直接与底物反应并进行两次迭代氢原子提取事件以催化这种重排(参见方案;SAM = S-腺苷甲硫氨酸)。