Identification of B-cell epitopes of Borrelia burgdorferi outer surface protein C by screening a phage-displayed gene fragment library. 2016

Lucia Pulzova, and Zuzana Flachbartova, and Elena Bencurova, and Lenka Potocnakova, and Lubos Comor, and Eva Schreterova, and Mangesh Bhide
Laboratory of Biomedical Microbiology and Immunology, Department of Microbiology and Immunology, University of Veterinary Medicine and Pharmacy, Komenskeho 73, 04181, Kosice, Slovakia.

Outer surface protein C (OspC) of Borrelia stimulates remarkable immune responses during early infection and is therefore currently considered a leading diagnostic and vaccine candidate. The sensitivity and specificity of serological tests based on whole protein OspC for diagnosis of Lyme disease are still unsatisfactory. Minimal B-cell epitopes are key in the development of reliable immunodiagnostic tools. Using OspC fragments displayed on phage particles (phage library) and anti-OspC antibodies isolated from sera of naturally infected patients, six OspC epitopes capable of distinguishing between LD patient and healthy control sera were identified. Three of these epitopes are located at the N-terminus (OspC E1 aa19-27, OspC E2 aa38-53, OspC E3 aa62-66) and three at the C-terminal end (OspC E4 aa155-163, OspC E5 aa184-190 and OspC E6 aa201-207). OspC E1, E4 and E6 were highly conserved among LD related Borreliae. To our knowledge, epitopes OspC E2, E3 and E5 were identified for the first time in this study. Minimal B-cell epitopes may provide fundamental data for the development of multi-epitope-based diagnostic tools for Lyme disease.

UI MeSH Term Description Entries
D008193 Lyme Disease An infectious disease caused by a spirochete, BORRELIA BURGDORFERI, which is transmitted chiefly by Ixodes dammini (see IXODES) and pacificus ticks in the United States and Ixodes ricinis (see IXODES) in Europe. It is a disease with early and late cutaneous manifestations plus involvement of the nervous system, heart, eye, and joints in variable combinations. The disease was formerly known as Lyme arthritis and first discovered at Old Lyme, Connecticut. Lyme Borreliosis,B. burgdorferi Infection,Borrelia burgdorferi Infection,Lyme Arthritis,Arthritis, Lyme,B. burgdorferi Infections,Borrelia burgdorferi Infections,Borreliosis, Lyme,Disease, Lyme
D011485 Protein Binding The process in which substances, either endogenous or exogenous, bind to proteins, peptides, enzymes, protein precursors, or allied compounds. Specific protein-binding measures are often used as assays in diagnostic assessments. Plasma Protein Binding Capacity,Binding, Protein
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000595 Amino Acid Sequence The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION. Protein Structure, Primary,Amino Acid Sequences,Sequence, Amino Acid,Sequences, Amino Acid,Primary Protein Structure,Primary Protein Structures,Protein Structures, Primary,Structure, Primary Protein,Structures, Primary Protein
D000907 Antibodies, Bacterial Immunoglobulins produced in a response to BACTERIAL ANTIGENS. Bacterial Antibodies
D000915 Antibody Affinity A measure of the binding strength between antibody and a simple hapten or antigen determinant. It depends on the closeness of stereochemical fit between antibody combining sites and antigen determinants, on the size of the area of contact between them, and on the distribution of charged and hydrophobic groups. It includes the concept of "avidity," which refers to the strength of the antigen-antibody bond after formation of reversible complexes. Affinity, Antibody,Antibody Avidity,Avidity, Antibody,Affinities, Antibody,Antibody Affinities,Antibody Avidities,Avidities, Antibody
D000918 Antibody Specificity The property of antibodies which enables them to react with some ANTIGENIC DETERMINANTS and not with others. Specificity is dependent on chemical composition, physical forces, and molecular structure at the binding site. Antibody Specificities,Specificities, Antibody,Specificity, Antibody
D000942 Antigens, Bacterial Substances elaborated by bacteria that have antigenic activity. Bacterial Antigen,Bacterial Antigens,Antigen, Bacterial
D001425 Bacterial Outer Membrane Proteins Proteins isolated from the outer membrane of Gram-negative bacteria. OMP Proteins,Outer Membrane Proteins, Bacterial,Outer Membrane Lipoproteins, Bacterial
D061505 Cell Surface Display Techniques Techniques utilizing cells that express RECOMBINANT FUSION PROTEINS engineered to translocate through the CELL MEMBRANE and remain attached to the outside of the cell. Cell Surface Display Technology,Phage Display Techniques,Display Technique, Phage,Display Techniques, Phage,Phage Display Technique,Technique, Phage Display,Techniques, Phage Display

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