Immunoelectron microscopic localisation of the OMP90 family on the outer membrane surface of Chlamydia psittaci

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Abstract

The putative outer membrane location of the OMP90 (formerly POMP) family from the ovine abortion strain of Chlamydia psittaci was investigated by immunoelectron microscopy. Using a non-embedding technique, antigens were shown to be localised on the outer membrane surface of both elementary and reticulate bodies, the infectious and non-infectious forms of Chlamydiae respectively. Antibodies affinity-purified against the expressed amino- and carboxy-terminal halves of one of the family members, OMP90A, demonstrated that the amino half is surface-exposed while the carboxyl half is most probably localised internally. Surface localisation on elementary bodies indicates the importance of these proteins as protective antigen candidates.

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Longbottom, D., Findlay, J., Vretou, E., & Dunbar, S. M. (1998). Immunoelectron microscopic localisation of the OMP90 family on the outer membrane surface of Chlamydia psittaci. FEMS Microbiology Letters, 164(1), 111–117. https://doi.org/10.1016/S0378-1097(98)00187-6

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