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  • Title: The Caulobacter crescentus outer membrane protein Omp58 (RsaF) is not required for paracrystalline S-layer secretion.
    Author: Reichelt M, von Specht BU, Hahn HP.
    Journal: FEMS Microbiol Lett; 2001 Jul 24; 201(2):277-83. PubMed ID: 11470374.
    Abstract:
    To identify the outer membrane protein component of the Caulobacter crescentus CB2 surface-layer export machinery we used the Serratia marcescens LipD protein to find homologs in the CB2 genome. From two homologous sequences found, one encodes a putative OMP with a predicted molecular mass of 57.5 kDa, termed Omp58 (formerly RsaF). Comparison of membrane protein profiles revealed a protein with an appropriate molecular mass present in wild-type, but not CB2 omp58::kanamycin, a mutant strain with an inactivated omp58 gene. Disruption of omp58 did not affect surface-layer production, suggesting that Omp58 is not involved in surface-layer protein secretion and, thus, may not be the outer membrane protein component of the C. crescentus surface-layer export system.
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