title: Immunolocalization of a 22 kDa protein (IPLA7, P22) of Borrelia burgdorferi.
abstract: The monoclonal antibody LA7 was raised against the species-specific Borrelia burgdorferi lipoprotein P22 (= IPLA7), which induces antibody formation in patients with Lyme arthritis. It is composed of 194 amino acids with a calculated molecular mass of 21.8 kDa. Its gene on the linear chromosome is 582 nucleotides in length. The aim of this study was to localize the protein P22 by immune electron microscopy. Immunolabeling of Borrelia burgdorferi with LA7 and an anti-mouse immunogold conjugate proved that P22 is an outer membrane protein. This finding was confirmed by sodium dodecyl sulfate polyacrylamide gel electrophoresis of the outer envelope fraction, which contained 99% of the P22 proteins.
authors.affiliation: Institut für Mikrobiologie und Immunologie der Universität, Bonn, Germany.
authors.forename: C
authors.initials: C
authors.lastname: Grewe
authors.forename: J H
authors.initials: JH
authors.lastname: Nuske
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal; D001425:Bacterial Outer Membrane Proteins / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D001426:Bacterial Proteins / Q000235:genetics / Q000276:immunology / Q000378:metabolism*; D015748:Borrelia burgdorferi Group / Q000235:genetics / Q000378:metabolism* / Q000648:ultrastructure; D002462:Cell Membrane / Q000378:metabolism / Q000648:ultrastructure; D005798:Genes, Bacterial; D006801:Humans; D008074:Lipoproteins / Q000235:genetics / Q000276:immunology / Q000378:metabolism*; D008193:Lyme Disease / Q000276:immunology; D016253:Microscopy, Immunoelectron; D008970:Molecular Weight
chemical_list: D000911:Antibodies, Monoclonal; D001425:Bacterial Outer Membrane Proteins; D001426:Bacterial Proteins; D008074:Lipoproteins