title: Phosphate starvation affects the synthesis of outer membrane proteins in Thiobacillus ferrooxidans.
abstract: The outer membrane protein (omp40) component from the chemolithoautotrophic acidophilic Thiobacillus ferrooxidans is apparently regulated by the external pH and the concentration of phosphorus. Its amino-terminal sequence showed little identity with the Escherichia coli OmpC, OmpF or PhoE porins, but was 38.5% identical to the outer membrane channel-forming protein NosA from Pseudomonas stutzeri, whose expression is also regulated environmentally. In addition, the partial amino acid sequence of T. ferrooxidans omp40 showed between 34 and 38% identity with the amino-terminal end of the small outer membrane proteins Rck and PagC from Salmonella typhimurium and OmpX from Enterobacter cloacae.
authors.affiliation: Departamento de Bioquímica, Facultad de Medicina, Universidad de Chile, Santiago.
authors.forename: C A
authors.initials: CA
authors.lastname: Jerez
authors.forename: M
authors.initials: M
authors.lastname: Seeger
authors.forename: A M
authors.initials: AM
authors.lastname: Amaro
mesh_terms: D000595:Amino Acid Sequence; D001425:Bacterial Outer Membrane Proteins / Q000096:biosynthesis* / Q000737:chemistry / Q000235:genetics; D015180:Electrophoresis, Gel, Two-Dimensional; D008969:Molecular Sequence Data; D008970:Molecular Weight; D010710:Phosphates / Q000494:pharmacology*; D017386:Sequence Homology, Amino Acid; D013045:Species Specificity; D013855:Thiobacillus / Q000187:drug effects* / Q000235:genetics / Q000378:metabolism
chemical_list: D001425:Bacterial Outer Membrane Proteins; D010710:Phosphates