A novel EF-hand calcium-binding protein in the flagellum of the protozoan Tritrichomonas suis.

Felleisen, R S; Hemphill, Andrew; Gottstein, Bruno (2001). A novel EF-hand calcium-binding protein in the flagellum of the protozoan Tritrichomonas suis. Parasitology, 122(02), pp. 125-132. Cambridge University Press

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The cloning and characterization of Ts-p41, an EF-hand calcium-binding protein of the protozoan parasite Tritrichomonas suis is described. A T. suis cDNA library was screened with monospecific antibodies affinity purified on an immunoreactive 41 kDa antigen in a Triton X-114 membrane-protein fraction. The resulting cDNA fragments turned out to be derived from 2 different genes encoding closely related Ts-p41 variants. The deduced amino acid sequences contained 6 EF-hand domains perfectly matching the canonical consensus motif and a putative C-terminal prenylation site. Northern and Southern hybridizations revealed that Ts-p41 was highly expressed and encoded by a gene-family. A cDNA encoding Ts-p41 was expressed as recombinant protein in Escherichia coli. By overlay with 45Ca it was demonstrated that the native and recombinant Ts-p41 proteins bind Ca2+. In immunofluorescence, epitopes recognized by anti-Ts-p41 antibodies were distributed as well on the anterior flagella as on the recurrent flagellum of the parasite. Our findings with the parabasalid T. suis suggest that multiple EF-hand bearing calcium-binding proteins might be a common phenomenon associated with flagellar motility.

Item Type:

Journal Article (Original Article)


05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP) > Institute of Parasitology

UniBE Contributor:

Hemphill, Andrew and Gottstein, Bruno


600 Technology > 610 Medicine & health
600 Technology > 630 Agriculture




Cambridge University Press




Bruno Gottstein

Date Deposited:

19 Jul 2018 15:41

Last Modified:

19 Jul 2018 15:41

PubMed ID:




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