Tada S, Volrath S, Guyer D, Scheidegger A, Ryals J, Ohta D, Ward E
International Research Laboratories, Ciba, (Japan) Ltd., Takarazuka.
Plant Physiol. 1994 Jun;105(2):579-83. doi: 10.1104/pp.105.2.579.
cDNA clones encoding imidazoleglycerolphosphate dehydratase (IGPD; EC 4.2.1.19) from Arabidopsis thaliana were isolated by complementation of a bacterial auxotroph. The predicted primary translation product shared significant identity with the corresponding sequences from bacteria and fungi. As in yeast, the plant enzyme is monofunctional, lacking the histidinol phosphatase activity present in the Escherichia coli protein. IGPD mRNA was present in major organs at all developmental stages assayed. The Arabidopsis genome appears to contain two genes encoding this enzyme, based on DNA gel blot and polymerase chain reaction analysis.
通过对一种细菌营养缺陷型的互补作用,从拟南芥中分离出了编码咪唑甘油磷酸脱水酶(IGPD;EC 4.2.1.19)的cDNA克隆。预测的初级翻译产物与来自细菌和真菌的相应序列具有显著的同源性。与酵母一样,植物酶是单功能的,缺乏大肠杆菌蛋白质中存在的组氨酸磷酸酶活性。在所检测的所有发育阶段,主要器官中均存在IGPD mRNA。基于DNA凝胶印迹和聚合酶链反应分析,拟南芥基因组似乎包含两个编码该酶的基因。