Sequence of the gat operon for galactitol utilization from a wild-type strain EC3132 of Escherichia coli
作者:Barbara Nobelmann、Joseph W. Lengeler
DOI:10.1016/0167-4781(95)00053-j
日期:1995.5
The sequence of the gat operon for galactitol (Gat) utilization from a wild-type isolate of Escherichia coli, strain EC3132, is presented. The operon comprises 7 open reading frames (ORFs) called gatYZABCDR. The genes are transcribed from a promoter located upstream of gatY. Genes gatABC encode the substrate-specific domains IIA, IIB and IIC of a galactitol-specific Enzyme II (EIIGat) of the phospho
给出了来自大肠杆菌的野生型分离株菌株EC3132的半乳糖醇(Gat)利用的gat操纵子的序列。操纵子包含7个开放阅读框(ORF),称为gatYZABCDR。从位于gatY上游的启动子转录基因。基因gatABC编码磷酸烯醇丙酮酸依赖性碳水化合物:磷酸转移酶系统(PTS)的半乳糖醇特异性酶II(EIIGat)的底物特异性结构域IIA,IIB和IIC。gatD编码NAD依赖性Gat 1-磷酸脱氢酶;gatY是水解塔格糖1,6-二磷酸的酶;细胞中必须有基因gatZ才能显示Gat +表型,但尚未确定其生理功能。gatR编码gat操纵子的阻遏物。所有基因都与大肠杆菌K-12的gat基因高度相似。在这种生物中,它们的图谱位于46。