title: The Pseudomonas putida peptidoglycan-associated outer membrane lipoprotein is involved in maintenance of the integrity of the cell cell envelope.
abstract: Pseudomonas putida 14G-3, a derivative of the natural soil inhabitant P. putida KT2440, exhibited a chromosomal insertion of a mini-Tn5/'phoA transposon that resulted in reduced ability to colonize soil. In vitro characterization of P. putida 14G-3 revealed that it exhibited an altered cell morphology and envelope, as revealed by electron microscopy. The derived strain was sensitive to sodium dodecyl sulfate, deoxycholate, and EDTA, produced clumps when it reached high cell densities in the late logarithmic growth phase, and did not grow on low-osmolarity medium. The P. putida DNA surrounding the mini-Tn5/'phoA insertion was cloned and used as a probe to rescue the wild-type gene, which was sequenced. Comparison of the deduced peptide sequence with sequences in the Swiss-Prot database allowed the knocked-out gene to be identified as that encoding the peptidoglycan-associated lipoprotein (Pal or OprL) of P. putida. The protein was identified in coupled transcription and translation assays in vitro.
authors.affiliation: Consejo Superior de Investigaciones Cientificas, Department of Biochemistry and Molecular and Cellular Biology of Plants, Granada, Spain.
authors.forename: J J
authors.initials: JJ
authors.lastname: Rodríguez-Herva
authors.forename: M I
authors.initials: MI
authors.lastname: Ramos-Gonzalez
authors.forename: J L
authors.initials: JL
authors.lastname: Ramos
mesh_terms: D000595:Amino Acid Sequence; D001425:Bacterial Outer Membrane Proteins; D001483:Base Sequence; D002462:Cell Membrane / Q000502:physiology*; D003001:Cloning, Molecular; D029968:Escherichia coli Proteins; D005798:Genes, Bacterial; D005816:Genetic Complementation Test; D005819:Genetic Markers; D008074:Lipoproteins / Q000235:genetics*; D008969:Molecular Sequence Data; D016296:Mutagenesis; D010457:Peptidoglycan / Q000235:genetics*; D011509:Proteoglycans; D016958:Pseudomonas putida / Q000235:genetics* / Q000254:growth & development / Q000648:ultrastructure; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid
chemical_list: D001425:Bacterial Outer Membrane Proteins; D029968:Escherichia coli Proteins; C031163:ExcC protein, E coli; D005819:Genetic Markers; D008074:Lipoproteins; D010457:Peptidoglycan; D011509:Proteoglycans; C069988:PplA protein, Legionella pneumophila