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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Genetic and physical characterization of putP, the proline carrier gene of Escherichia coli K12.

Two new mutants of E. coli K12, strains PT9 and PT32 were isolated, that were defective in proline transport. They had no high affinity proline transport activity, but their cytoplasmic membranes retained proline binding activity with altered sensitivity to inhibition by p-chloromercuribenzoate (pCMB). The lesion was mapped at the putP gene, which is located at min 23 on the revised E. coli genetic map (Bachmann 1983) as a composite gene in the proline utilization gene cluster, putP, putC, and putA, arranged in this order. The putC gene was shown to regulate the synthesis of proline dehydrogenase (putA gene product). Hybrid plasmids carrying the put region (Motojima et al. 1979; Wood et al. 1979) were used to construct the physical map of the put region. The possible location of the putP gene in the DNA segment was determined by subcloning the putP gene, genetic complementation, and recombination analyses using several proline transport mutants.[1]

References

  1. Genetic and physical characterization of putP, the proline carrier gene of Escherichia coli K12. Mogi, T., Yamamoto, H., Nakao, T., Yamato, I., Anraku, Y. Mol. Gen. Genet. (1986) [Pubmed]
 
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