DOI: 10.1101/454884Oct 27, 2018Paper

BspA and Pmp proteins of Trichomonas vaginalis mediate adherence to host cells

BioRxiv : the Preprint Server for Biology
Maria R. HandrichSven B. Gould


Trichomonas vaginalis is one of the most widespread, sexually transmitted pathogens. The infection involves a morphological switch from a free-swimming pyriform trophozoite to an amoeboid cell upon adhesion to host epithelial cells. While details on how the switch is induced and to what proteins of the host surface the parasite adheres remain poorly characterized, several surface proteins of the parasite itself have been identified as potential candidates. Among those are two expanded protein families that harbor domains that share similarity to functionally investigated surface proteins of prokaryotic oral pathogens; these are the BspA proteins of Bacteroidales and Spirochaetales, and the Pmp proteins of Chlamydiales. We sequenced the transcriptomes of five Trichomonads and screened for the presence of BspA and Pmp domain-containing proteins and tested the ability of individual T. vaginalis candidates to mediate adhesion. Here we demonstrate that (i) BspA and Pmp domain-containing proteins are specifically expanded in T. vaginalis in comparison to other Trichomonads, and that (ii) individual proteins of both families have the ability to increase adhesion performance in a non-virulent T. vaginalis strain and Tetratrichomonas ga...Continue Reading

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