Zhou D, White R H
Department of Biochemistry and Nutrition, Virginia Polytechnic Institute and State University, Blacksburg 24061.
J Bacteriol. 1989 Dec;171(12):6610-6. doi: 10.1128/jb.171.12.6610-6616.1989.
The biosynthesis of caldariellaquionone (CQ) was studied in species of Sulfolobus by measuring the incorporation of stable isotopically labeled tyrosines into CQ. By feeding a series of tyrosines labeled with deuterium or 13C and then measuring the extent and position at which label was incorporated into CQ by mass spectrometry, it was shown that more than 95% of the label was incorporated into the benzo[b]thiophen-4,7-quinone moiety of CQ. From the labeling experiments, it is concluded that the benzo[b]thiophen-4,7-quinone is derived as an intact unit from all of the carbons of tyrosine except C-1.
通过测量稳定同位素标记的酪氨酸掺入卡尔达里醌(CQ)的情况,研究了嗜热栖热菌属物种中卡尔达里醌(CQ)的生物合成。通过投喂一系列用氘或¹³C标记的酪氨酸,然后用质谱法测量标记物掺入CQ的程度和位置,结果表明超过95%的标记物掺入了CQ的苯并[b]噻吩-4,7-醌部分。从标记实验得出结论,苯并[b]噻吩-4,7-醌是作为一个完整单元从酪氨酸除C-1以外的所有碳原子衍生而来的。