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Journal of Clinical Microbiology, Jul 1995, 1860-1866, Vol 33, No. 7
Copyright © 1995 by the American Society for Microbiology. All rights reserved.

Molecular analysis of genes encoding outer surface protein C (OspC) of Borrelia burgdorferi sensu lato: relationship to ospA genotype and evidence of lateral gene exchange of ospC

S Jauris-Heipke, G Liegl, V Preac-Mursic, D Rossler, E Schwab, E Soutschek, G Will and B Wilske
Max von Pettenkofer Institut fur Hygiene und Medizinische Mikrobiologie der Universitat Munchen, Germany.

It has been shown by analysis with monoclonal and polyclonal antibodies that outer surface protein C (OspC) of Borrelia burgdorferi sensu lato is highly heterogeneous. To determine if the heterogeneity has a genetic basis, the genes of 18 different B. burgdorferi sensu lato strains have been amplified by PCR, cloned, and sequenced. The ospC genes could be amplified from all strains tested, even from two strains which did not express OspC in detectable amounts. Among the 18 strains, 16 significantly different types of ospC sequences have been found. The sequence identities of the deduced amino acid sequences of different ospC genotypes range between 62 and 80% (determined without the leader peptide). The sequences range between 62 and 80% (determined without the leader peptide). The sequences correspond to one of the 13 OspC types distinguishable by analysis with monoclonal antibodies (B. Wilske, S. Jauris-Heipke, R. Lobentanzer, I. Pradel, V. Preac-Mursic, D. Roessler, E. Soutschek, and R. C. Johnson, J. Clin. Microbiol. 33:103-109, 1995) or represent additional types. Two completely new types were found, and OspC type 8 (which was found in Borrelia afzelii and Borrelia garinii) could be divided into two groups with different sequences but the same antibody pattern. Thus, strains belonging to different species or OspA serotypes were always significantly different in their ospC sequences. This was also confirmed by ospA sequence analysis. Interestingly, some strains of the same OspA serotype or genotype were very heterogeneous with respect to OspC, while others had nearly identical OspC proteins.(ABSTRACT TRUNCATED AT 250 WORDS)


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Copyright © 1995 by the American Society for Microbiology. All rights reserved.