Identification of a piroplasm protein of Theileria orientalis that binds to bovine erythrocyte band 3

Molecular and Biochemical Parasitology
Jung-Yeon KimC Sugimoto

Abstract

Theileria orientalis infects cattle and causes various disease symptoms, including anaemia and icterus. The erythrocytic stages are responsible for these symptoms but the molecular events involved in these stages have not yet been fully elucidated. In this study, we identified a T. orientalis cDNA that encodes a polypeptide related to identity to the microneme-rhoptry protein of Theileria parva. Analysis of its recombinant product (ToMRP) by indirect fluorescent-antibody test revealed that it is specifically expressed at the early erythrocytic stage after invasion. This expression disappears during the intermediate stages of intra-erythrocytic development. Its expression then reappears at the late stages after the parasite has divided by binary fission into diad or tetrad forms and before these forms are released from the host erythrocyte. In vitro erythrocyte binding assays showed that ToMRP associates with the Triton X-insoluble fraction of erythrocytes membrane but not with intact erythrocytes. Cosedimentation and Western blot analyses revealed that ToMRP binds to band 3, a membrane component of bovine erythrocytes. These observations suggest that ToMRP may be involved in the parasite's egress from and/or invasion into the h...Continue Reading

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Citations

Dec 26, 2009·Molecular Biology and Evolution·Kenji HikosakaKazuyuki Tanabe
Dec 15, 2010·Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases·Joseph KamauChihiro Sugimoto
Jun 15, 2010·Molecular and Biochemical Parasitology·Kyoko HayashidaChihiro Sugimoto
Dec 15, 2020·Biology of the Cell·Shahin Tajeri, Gordon Langsley

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