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FEMS Microbiol Lett. 1991 Nov 1;68(1):7-13.

Identification of a new mutation in Escherichia coli that suppresses a pbpB (Ts) phenotype in the presence of penicillin-binding protein 1B.

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  • 1Centro de Biología Molecular, Universidad Autónoma, Madrid, Spain.


Analysis of the functional role of penicillin-binding protein 1B (PBP1B) of Escherichia coli led us to find a new mutation able to suppress thermosensitive growth of the pbpB2158(Ts) mutant strain, which harbors a thermosensitive PBP3 protein only in the presence of a ponB+ background. The mutation, originally isolated in a strain with a high dosage of PBP1B, could also suppress the pbpB(Ts) phenotype when a single copy of the ponB gene was introduced. These results clearly give further support to the implication of PPB1B in the septation process in Escherichia coli.

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