title: Cloning and characterization of an outer membrane protein (Lip18) from Helicobacter bizzozeronii.
abstract: A recombinant lambda-Zap II phage was selected by screening a genomic library of Helicobacter bizzozeronii (Hb) using antibodies from a naturally infected cat. DNA sequencing resulted an open reading frame containing 172 codons with a predicted molecular mass of 18 kDa (Lip18). The amino acid sequence showed 22.1, 55.2, 56.7 and 57.1% identity to peptidoglycan-associated lipoprotein of Helicobacter pylori, Agrobacterium tumefaciens, Bartonella bacilliformis, respectively. A peptidoglycan associating alpha-helical motif (LALGQRRSVAVRDYLVS) was located in the C-terminal region. H. bizzozeronii contains a potential lipoprotein signal peptide cleavage site (Val-Val-Gly-Cys), and yields a predicted mature protein with 148 amino acids. The Lip18 was localized into the outer membrane of the bacteria. Immunoblot analysis of serum samples from a dog and cat naturally infected with Helicobacter spp was able to recognize the purified recombinant Lip18.
authors.affiliation: College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
authors.forename: Jiaqian
authors.initials: J
authors.lastname: Zhu
authors.forename: Yuan-Man
authors.initials: YM
authors.lastname: Hsu
authors.forename: Chao-Fu
authors.initials: CF
authors.lastname: Chang
authors.forename: Ching-Dong
authors.initials: CD
authors.lastname: Chang
authors.forename: Kenneth W
authors.initials: KW
authors.lastname: Simpson
authors.forename: Huolin
authors.initials: H
authors.lastname: Tu
authors.forename: Yung-Fu
authors.initials: YF
authors.lastname: Chang
mesh_terms: D020816:Amino Acid Motifs; D000595:Amino Acid Sequence; D001425:Bacterial Outer Membrane Proteins / Q000737:chemistry* / Q000235:genetics*; D001483:Base Sequence; D015153:Blotting, Western; D002462:Cell Membrane / Q000378:metabolism; D003001:Cloning, Molecular; D004247:DNA / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000378:metabolism; D015723:Gene Library; D016998:Helicobacter / Q000235:genetics* / Q000378:metabolism*; D008969:Molecular Sequence Data; D010457:Peptidoglycan / Q000737:chemistry; D011994:Recombinant Proteins / Q000737:chemistry / Q000378:metabolism; D017386:Sequence Homology, Amino Acid; D013347:Subcellular Fractions / Q000378:metabolism
chemical_list: D001425:Bacterial Outer Membrane Proteins; D010457:Peptidoglycan; D011994:Recombinant Proteins; D004247:DNA