title: Lipoproteins of Haemophilus influenzae type b.
abstract: Haemophilus influenzae type b Minn A produced 12 lipoproteins with apparent molecular weights of between 14,000 and 67,000. The lipoproteins were identified by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and fluorography of delipidated extracts of cells grown in [3H]palmitate. When the delipidated cell extracts were subjected to acid methanolysis, tritium was quantitatively recovered as palmitate and methyl palmitate, indicating that the [3H]palmitate had not been degraded and reincorporated into nonlipid material during cell growth. One of the lipoproteins comigrated with outer membrane protein (OMP) P6. OMP P6 was purified from [3H]palmitate-labeled cells. The purified protein preparation contained both amide- and ester-linked fatty acids. We conclude that (i) H. influenzae type b produces several lipoproteins, and (ii) one of these lipoproteins is OMP P6, a protein under consideration as a vaccine component.
authors.affiliation: Edward Mallinckrodt Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri 63110.
authors.forename: G A
authors.initials: GA
authors.lastname: Weinberg
authors.forename: D A
authors.initials: DA
authors.lastname: Towler
authors.forename: R S
authors.initials: RS
authors.lastname: Munson
mesh_terms: D001425:Bacterial Outer Membrane Proteins / Q000032:analysis*; D004591:Electrophoresis, Polyacrylamide Gel; D006193:Haemophilus influenzae / Q000032:analysis / Q000378:metabolism*; D008074:Lipoproteins / Q000032:analysis*
chemical_list: D001425:Bacterial Outer Membrane Proteins; D008074:Lipoproteins