title: [Purification, amino acid composition and N-terminal sequence of the major protein (protein H) of the outer membrane of Pasteurella multocida].
abstract: The major protein (protein H) of the outer membrane of Pasteurella multocida was purified by size-exclusion chromatography after selective extraction with detergents. The protein forms homotrimers which are stable in the presence of SDS at room temperature. Upon treatment at 100 degrees C, the protein is fully dissociated by the detergent into monomers exhibiting an apparent molecular mass of 37 kDa as estimated by electrophoresis. The amino acid composition of protein H is characterized by a low hydropathy index (HI = -0.40) and is strongly related to the compositions of bacterial porins, notably porins P2 (Haemophilus influenzae), PIA (Neisseria gonorrhoeae) and Cl.2 ("class 2 porin" of N. meningitidis). The N-terminal amino acid sequence of protein H shares a strong homology with those of porins OmpC (Escherichia coli) and P2. These data indicate that protein H of P. multocida is a porin belonging to the superfamily of the non-specific porins of Gram-negative eubacteria outer membrane.
authors.affiliation: Laboratoire d'Immunochimie des Membranes bactériennes, Université de Rennes-I, C.N.R.S.-U.R.A. n. 256.
authors.forename: G
authors.initials: G
authors.lastname: Chevalier
authors.forename: M
authors.initials: M
authors.lastname: Le Henaff
authors.forename: H
authors.initials: H
authors.lastname: Wroblewski
mesh_terms: D000595:Amino Acid Sequence; D001425:Bacterial Outer Membrane Proteins / Q000737:chemistry / Q000302:isolation & purification*; D004591:Electrophoresis, Polyacrylamide Gel; D016979:Pasteurella multocida / Q000737:chemistry*; D010443:Peptide Chain Termination, Translational
chemical_list: D001425:Bacterial Outer Membrane Proteins
vernacular_title: Purification, composition en aminoacides et séquence N-terminale de la protéine majoritaire (protéine H) de la membrane externe de Pasteurella multocida.