Melton T, Kundig W, Hartman P E, Meadow N
J Bacteriol. 1976 Dec;128(3):794-800. doi: 10.1128/jb.128.3.794-800.1976.
Three classes of phosphotransferase system mutants in Salmonella typhimurium were selected through their resistance to 3-deoxy-3-fluoro-D-glucose (DFG). Strains with mutations in the ptsH (HPr) and/or pts I (enzyme I) genes were selected on medium containing lactate plus DFG. Strains with mutations in ptsH but not pstI were selected on medium containing fructose plus DFG. Clones isolated from fructose plus DFG semisolid plates and selected for ability to swarm were mutant in either ptsH or ptsG. Mutants of the latter class were defective in enzyme IIB', a membrane component of the glucose transport system. Some pleiotropic properties of one representative ptsG mutant are described.
通过对鼠伤寒沙门氏菌的磷酸转移酶系统突变体进行对3-脱氧-3-氟-D-葡萄糖(DFG)的抗性筛选,选出了三类突变体。ptsH(HPr)和/或ptsI(酶I)基因发生突变的菌株是在含有乳酸盐加DFG的培养基上筛选出来的。ptsH发生突变但pstI未突变的菌株是在含有果糖加DFG的培养基上筛选出来的。从果糖加DFG半固体平板上分离并选择具有群体运动能力的克隆,其ptsH或ptsG发生了突变。后一类突变体在酶IIB'(葡萄糖转运系统的膜成分)中存在缺陷。描述了一个代表性ptsG突变体的一些多效性特征。