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- W2023665874 abstract "Abstract A novel OmpY porin was predicted based on the Yersinia pseudotuberculosis genome analysis. Whereas it has the different genomic annotation such as “outer membrane protein N” (ABS46310.1) in str. IP 31758 or “outer membrane protein C2, porin” (YP_070481.1) in str. IP32953, it might be warranted to rename the OmpN/OmpC2 to Omp Y, “outer membrane protein Y”, where letter “Y” pertained to Yersinia. Both phylogenetic analysis and genomic localization clearly support that the Omp Y porin belongs to a new group of general bacterial porins. The recombinant OmpY protein with its signal sequence was overexpressed in porin-deficient Escherichia coli strain. The mature rOmp Y was shown to insert into outer membrane as a trimer. The Omp Y porin, isolated from the outer membrane, was studied employing spectroscopic, electrophoretic and bilayer lipid membranes techniques. The far UV CD spectrum of rOmp Y was essentially identical to that of Y. pseudotuberculosis OmpF. The near UV CD spectrum of rOmp Y was weaker and smoother than that of OmpF. The rOmpY single-channel conductance was 180 ± 20 pS in 0.1 M NaCl and was lower than that of the OmpF porin. As was shown by electrophoretic and bilayer lipid membrane experiments, the rOmpY trimers were less thermostable than the OmpF trimers. The porins differed in the trimer-monomer transition temperature by about 20°C. The three-dimensional structural models of the Y. pseudotuberculosis OmpY and OmpF trimers were generated and the intra- and intermonomeric interactions stabilizing the porins were investigated. The difference in the thermal stability of OmpY and OmpF trimers was established to correlate with the difference in intermonomeric polar contacts." @default.
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- W2023665874 date "2011-02-01" @default.
- W2023665874 modified "2023-09-26" @default.
- W2023665874 title "A Novel OmpY Porin FromYersinia Pseudotuberculosis: Structure, Channel-Forming Activity and Trimer Thermal Stability" @default.
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- W2023665874 doi "https://doi.org/10.1080/07391102.2011.10508592" @default.
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