Sequence and transcriptional start site of the Pseudomonas aeruginosa outer membrane porin protein F gene

作者：Michael Duchêne, Andrea Schweizer, Friedrich Lottspeich, G.-J. Krauss, Matthias Marget, Karin Vogel, Bernd Ulrich von Specht, Horst Domdey · 发表于：Journal of Bacteriology · 年份：1988 · DOI：10.1128/jb.170.1.155-162.1988 · 被引用次数：113 · 研究领域：Bacteriophages and microbial interactions、Bacterial Genetics and Biotechnology、RNA and protein synthesis mechanisms

Porin F is one of the major proteins of the outer membrane of Pseudomonas aeruginosa. It forms water-filled pores of variable size. Porin F is a candidate for a vaccine against P. aeruginosa because it antigenically cross-reacts in all serotype strains of the International Antigenic Typing Scheme. We have isolated the gene for porin F from a lambda EMBL3 bacteriophage library by using oligodeoxynucleotide hybridization probes and have determined its nucleotide sequence. Different peptide sequences obtained from isolated porin F confirmed the deduced protein sequence. The mature protein consists of 326 amino acid residues and has a molecular weight of 35,250. The precursor contains an N-terminal signal peptide of 24 amino acid residues. S1 protection and primer extension experiments, together with Northern (RNA) blots, indicate that the mRNA coding for porin F is monocistronic with short untranslated regions of about 58 bases at the 5' end and about 47 bases at the 3' end. The sequences in the -10 and -35 regions upstream of the transcriptional start site are closely related to the Escherichia coli promoter consensus sequences, which explains why the porin F gene is expressed in E. coli under the control of its own promoter. The amino acid sequence of porin F is not homologous to the different E. coli porins OmpF, OmpC, LamB, and PhoE. On the other hand, a highly homologous region of 30 amino acids between the OmpA proteins of different enteric bacteria and porin F of P. aerug...