Penicillin-binding proteins in leptospira interrogans

A. Brenot, D. Trott, I. Saint Girons, R. Zuerner

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

The Leptospira interrogans ponA and pbpB genes were isolated and characterized, ponA and pbpB encode the penicillin-binding proteins (PBPs) 1 and 3, respectively. There is little sequence variation between the PBP genes from two L. interrogans strains (serovar icterohaemorrhagiae strain Verdun and serovar pomona strain RZ11). The deduced L. interrogans PBP 1 and PBP 3 protein sequences from the two strains shared over 50% similarity to homologous proteins from Escherichia coli. It was demonstrated for strain Verdun that ponA and pbpB are transcribed individually from their own promoter. The ponA and pbpB genes from both strains are separated by 8 to 10 kb and oriented such that their transcription is convergent. The L. interrogans PBP 1 and PBP 3 proteins were synthesized in E. coli and were modified with ampicillin using a digoxigenin-ampicillin conjugate. These data show that both genes encode functional PBPs.

Original languageEnglish
Pages (from-to)870-877
Number of pages8
JournalAntimicrobial agents and chemotherapy
Volume45
Issue number3
DOIs
StatePublished - 2001

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