Publication: Recombinant expression and characterization of major surface protein 4 from Anaplasma marginale
Issued Date
2019-09-01
Resource Type
ISSN
18736254
0001706X
0001706X
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2-s2.0-85067033964
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Mahidol University
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SCOPUS
Bibliographic Citation
Acta Tropica. Vol.197, (2019)
Suggested Citation
Amaya Watthanadirek, Runglawan Chawengkirttikul, Napassorn Poolsawat, Witchuta Junsiri, Dusit Boonmekam, Onrapak Reamtong, Panat Anuracpreeda Recombinant expression and characterization of major surface protein 4 from Anaplasma marginale. Acta Tropica. Vol.197, (2019). doi:10.1016/j.actatropica.2019.105047 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/49729
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Title
Recombinant expression and characterization of major surface protein 4 from Anaplasma marginale
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Abstract
© 2019 Elsevier B.V. Anaplasma marginale is the rickettsia which causes the bovine anaplasmosis. The distribution of A. marginale is both tropical and subtropical regions of the world. The major surface protein 4 (MSP4) of this parasite was identified as an immunodominant protein. In this study, the full length of DNA encoding A. marginale MSP4 (AmMSP4) was cloned from the parasites. The open reading frame of msp4 coding sequence of Thailand strain is 849 bp. Phylogenetic analysis revealed that the msp4 coding sequence of A. marginale was highly conserved when compared with Anaplasma phagocytophilum. The recombinant plasmid was further transformed into the BL21-CodonPlus (DE3)-RIPL competent cells for over-expression of the recombinant major surface protein 4 of A. marginale (rAmMSP4). Sera from rabbit immunized with rAmMSP4 and from cattle infected with A. marginale were used to study the antigenicity of rAmMSP4 (35 kDa) and AmMSP4 (31 kDa). Both rAmMSP4 and AmMSP4 were recognized by these sera showing that recombinant and native AmMSP4 have conserved epitopes. Localization of Anaplasma parasites by immunofluorescence showed these parasites are distributed on both the membrane and the outside of infected erythrocytes. Regarding antigenicity, recombinant MSP4 could be used for immunodiagnostic purposes and as a possible vaccine candidate against anaplasmosis.