Identification of a maltose-inducible major outer membrane protein in Actinobacillus (Haemophilus) pleuropneumoniae.
The addition of maltose to the growth media of Actinobacillus pleuropneumonia (serotype 1) resulted in the induction of an outer membrane protein (OMP) with a molecular mass of 42 kDa. This protein had porin-like properties in that it was peptidoglycan-associated and was resistant to proteolysis by trypsin. A pleuropneumoniae expressing the 42 kDa OMP were unable to bind lambda phage. Similar proteins were also induced in A. pleuropneumoniae isolates representing serotypes 2 to 7 with the exception of serotype 4; however, not all isolates of any given serotype expressed a maltose-inducible OMP. Western immunoblotting using convalescent antiserae against the serotype 1 A. pleuropneumoniae indicated that the 42 kDa OMP was expressed in vivo and was cross-reactive with the maltose-inducible OMPs from other serotypes.[1]References
- Identification of a maltose-inducible major outer membrane protein in Actinobacillus (Haemophilus) pleuropneumoniae. Deneer, H.G., Potter, A.A. Microb. Pathog. (1989) [Pubmed]
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