NDLI: Epitope Mapping of Immunogenic and Adhesive Structures in Repetitive Domains of Mycoplasma bovis Variable Surface Lipoproteins

Content Provider	PubMed Central
Author	Sachse, K. Helbig, J. H. Lysnyansky, I. Grajetzki, C. Müller, W. Jacobs, E. Yogev, D.
Editor	Tuomanen, E. I.
Copyright Year	2000
Abstract	The family of variable surface lipoproteins (Vsps) of the bovine pathogen Mycoplasma bovis includes some of the most immunogenic antigens of this microorganism. Vsps were shown to undergo high-frequency phase and size variations and to possess extensive reiterated coding sequences extending from the N-terminal end to the C-terminal end of the Vsp molecule. In the present study, mapping experiments were conducted to detect regions with immunogenicity and/or adhesion sites in repetitive domains of four Vsp antigens of M. bovis, VspA, VspB, VspE, and VspF. In enzyme-linked immunosorbent assay experiments, sera obtained from naturally infected cattle showed antibodies to different repeating peptide units of the Vsps, particularly to units RA1, RA2, RA4.1, RB2.1, RE1, and RF1, all of which were found to contain immunodominant epitopes of three to seven amino acids. Competitive adherence trials revealed that a number of oligopeptides derived from various repeating units of VspA, VspB, VspE, and VspF partially inhibited cytoadhesion of M. bovis PG45 to embryonic bovine lung cells. Consequently, putative adherence sites were identified in the same repeating units (RA1, RA2, RA4.1, RB2.1, RE1, and RF1) and in RF2. The positions and lengths of the antigenic determinants were mostly identical to those of adhesion-mediating sites in all short repeating units, whereas in the considerably longer RF1 unit (84 amino acid residues), there was only one case of identity among four immunogenic epitopes and six adherence sites. The identification of epitopes and adhesive structures in repetitive domains of Vsp molecules is consistent with the highly immunogenic nature observed for several members of the Vsp family and suggests a possible function for these Vsp molecules as complex adherence-mediating regions in pathogenesis.
Starting Page	680
File Format	PDF
ISSN	10985522
e-ISSN	10985522
Journal	Infection and Immunity
Issue Number	2
Volume Number	68
Language	English
Publisher	American Society for Microbiology
Publisher Date	2000-02-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Infectious Diseases Parasitology Immunology Microbiology

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