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. 1980 Mar;141(3):1064-70.
doi: 10.1128/jb.141.3.1064-1070.1980.

Identification and mapping of a second proline permease Salmonella typhimurium

R Menzel, J Roth

Identification and mapping of a second proline permease Salmonella typhimurium

R Menzel et al. J Bacteriol. 1980 Mar.

Abstract

In this paper we demonstrate the existence of a second proline permease, gene proP, in Salmonella typhimurium. Uptake assays demonstrate that this second proline permease has 5 to 10% the uptake rate of the putP permease, the cell's major proline permease, when assayed at 20 microM proline. Genetic mapping by Hfr and P22-mediated genetic crosses placed the second proline permease gene at 92 min on the S. typhimurium genetic map, near the genes for melibiose utilization. F'-mediated complementation tests indicated that Escherichia coli also has the proP gene.

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