Rida S, Caillet J, Alix J H
Institut de Biologie Physico-Chimique, Paris, France.
J Bacteriol. 1996 Jan;178(1):94-102. doi: 10.1128/jb.178.1.94-102.1996.
We have isolated an Escherichia coli gene which, when overexpressed, is able to complement the permeability defects of a vancomycin-susceptible mutant. This gene, designated sanA, is located at min 47 of the E. coli chromosome and codes for a 20-kDa protein with a highly hydrophobic amino-terminal segment. A strain carrying a null mutation of the sanA gene, transferred to the E. coli chromosome by homologous recombination, is perfectly viable, but after two generations at high temperature (43 degrees C), the barrier function of its envelope towards vancomycin is defective.
我们分离出了一个大肠杆菌基因,该基因在过表达时能够弥补对万古霉素敏感的突变体的通透性缺陷。这个名为sanA的基因位于大肠杆菌染色体的47分钟处,编码一种20 kDa的蛋白质,其氨基末端片段具有高度疏水性。通过同源重组转移到大肠杆菌染色体上的携带sanA基因无效突变的菌株完全可以存活,但在高温(43摄氏度)下培养两代后,其包膜对万古霉素的屏障功能出现缺陷。