title: Two-dimensional map of basic proteins of Haemophilus influenzae.
abstract: Haemophilus influenzae is a bacterium of medical interest of which the entire genome has been sequenced. The proteome of the microorganism has been analyzed by two-dimensional gel electrophoresis, during which immobilized pH 3-10 gradient strips were used and approximately 300 proteins were identified. In order to detect additional, basic proteins, we analyzed the soluble protein fraction of H. influenzae and the proteins of fractions collected from affinity chromatography on heparin, by two-dimensional gel electrophoresis, using for the first-dimensional separation immobilized pH gradient strips comprising the pH region of 6-11. The protein spots were analyzed by matrix-assisted laser desorption ionization-mass spectrometry. One hundred and two proteins were identified, of which 58 were identified for the first time. A large percentage of the basic proteins represent nucleic acid binding and, in particular, ribosomal proteins. The locations of the identified basic proteins of H. influenzae are indicated in a two-dimensional map.
authors.affiliation: Preclinical Central Nervous System Research-Gene Technology, Basel, Switzerland. michael.fountoulakis@roche.com
authors.forename: M
authors.initials: M
authors.lastname: Fountoulakis
authors.forename: B
authors.initials: B
authors.lastname: Takács
authors.forename: H
authors.initials: H
authors.lastname: Langen
mesh_terms: D001426:Bacterial Proteins / Q000032:analysis*; D015180:Electrophoresis, Gel, Two-Dimensional; D006193:Haemophilus influenzae / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D010449:Peptide Mapping
chemical_list: D001426:Bacterial Proteins