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. 1993 Mar;61(3):1136–1140. doi: 10.1128/iai.61.3.1136-1140.1993

Molecular cloning, expression, and DNA sequence analysis of the gene that encodes the 16-kilodalton outer membrane lipoprotein of Serpulina hyodysenteriae.

W Thomas 1, R Sellwood 1
PMCID: PMC302851  PMID: 8432595

Abstract

The gene (smpA) that encodes the 16-kDa outer membrane lipoprotein of Serpulina hyodysenteriae was cloned in Escherichia coli, and its primary structure was determined by nucleotide sequencing. The putative open reading frame encodes a prolipoprotein of 16.8 kDa which in its fully acylated and cleaved form is 15.1 kDa. Analysis of the N-terminal amino acid sequence derived from the DNA sequence revealed the presence of a signal sequence and a putative acylation and signal peptidase II cleavage site (Phe-Ala-Val-Ser-Cys). In E. coli, processing of the prolipoprotein was less efficient than that observed in S. hyodysenteriae, and globomycin, an inhibitor of signal peptidase II, inhibited cleavage of the lipoprotein expressed in E. coli but did not inhibit cleavage in S. hyodysenteriae.

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