Thomas J A, Valvano M A
Department of Microbiology and Immunology, University of Western Ontario, London, Canada.
J Bacteriol. 1993 Jan;175(2):548-52. doi: 10.1128/jb.175.2.548-552.1993.
IutA is the outer membrane protein receptor for ferric aerobactin and the bacteriocin cloacin DF13. Although the same receptor is shared, ferric aerobactin transport across the outer membrane in Escherichia coli is TonB dependent, whereas cloacin DF13 transport is not. We have recently observed that tolQ is required for cloacin DF13 susceptibility (J.A. Thomas and M.A. Valvano, FEMS Microbiol. Lett. 91:107-112, 1992). In this study, we demonstrate that the genes tolQ, tolR, and tolA, but not tolB, tolC, and ompF, are required for the internalization of cloacin DF13 and they are not involved in the transport of ferric aerobactin.
IutA是铁运铁菌素和细菌素cloacin DF13的外膜蛋白受体。尽管共享相同的受体，但铁运铁菌素在大肠杆菌中外膜转运是TonB依赖性的，而cloacin DF13的转运则不是。我们最近观察到tolQ是cloacin DF13敏感性所必需的（J.A.托马斯和M.A.瓦尔瓦诺，《FEMS微生物学快报》91:107 - 112，1992）。在本研究中，我们证明基因tolQ、tolR和tolA是cloacin DF13内化所必需的，而tolB、tolC和ompF则不是，并且它们不参与铁运铁菌素的转运。
