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. 1984 Aug;159(2):579–582. doi: 10.1128/jb.159.2.579-582.1984

Host range mutants of bacteriophage Ox2 can use two different outer membrane proteins of Escherichia coli K-12 as receptors.

R Morona, U Henning
PMCID: PMC215682  PMID: 6378883

Abstract

The Escherichia coli K-12 outer membrane protein OmpA functions as the receptor for bacteriophage Ox2. We isolated a host range mutant of this phage which was able to grow on an Ox2-resistant ompA mutant producing an altered OmpA protein. From this mutant, Ox2h5, a second-step host range mutant was recovered which formed turbid plaques on a strain completely lacking the OmpA protein. From one of these mutants, Ox2h10, a third-step host range mutant, Ox2h12, was isolated which formed clear plaques on a strain missing the OmpA protein. Ox2h10 and Ox2h12 apparently were able to use both outer membrane proteins OmpA and OmpC as receptors. Whereas there two proteins are very different with respect to primary structures and functions, the OmpC protein is very closely related to another outer membrane protein, OmpF, which was not recognized by Ox2h10 or Ox2h12. An examination of the OmpC amino acid sequence, in the regions where it differs from that of OmpF, revealed that one region shares considerable homology with a region of the OmpA protein which most likely is required for phage Ox2 receptor activity.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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