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논문 기본 정보

자료유형
학술저널
저자정보
Zhaoshou Yang (The Catholic University of Korea) Hye-Jin Ahn (The Catholic University of Korea) Ho-Woo Nam (The Catholic University of Korea)
저널정보
대한기생충학열대의학회 Parasites, Hosts and Diseases The Korean Journal of Parasitology Vol.52 No.4
발행연도
2014.8
수록면
367 - 376 (10page)

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Recombinant antigenic proteins of Toxoplasma gondii are alternative source of antigens which are easily obtainable for serodiagnosis of toxoplasmosis. In this study, highly antigenic secretory organellar proteins, dense granular GRA2 and GRA3, rhoptrial ROP2, and micronemal MIC2, were analyzed by bioinformatics approach to express as water-soluble forms of antigenic domains. The transmembrane region and disorder tendency of 4 secretory proteins were predicted to clone the genes into pGEX-4T-1 vector. Recombinant plasmids were transformed into BL21 (DE3) pLysS E. coli, and GST fusion proteins were expressed with IPTG. As a result, GST fusion proteins with GRA2<SUB>25-105</SUB>, GRA3<SUB>39-138</SUB>, ROP2<SUB>324-561</SUB>, and MIC2<SUB>1-284</SUB> domains had respectively higher value of IgG avidity. The rGST-GRA2<SUB>25-105</SUB> and rGST-GRA3<SUB>39-138</SUB> were soluble, while rGST-ROP2<SUB>324-561</SUB> and rGST-MIC2<SUB>1-284</SUB> were not. GRA2<SUB>31-71</SUB>, intrinsically unstructured domain (IUD) of GRA2, was used as a linker to enhance the solubility. The rGST-GRA2<SUB>31-71</SUB>-ROP2<SUB>324-561</SUB>, a chimeric protein, appeared to be soluble. Moreover, rGST-GRA2<SUB>31-71</SUB>-MIC2<SUB>1-284</SUB> was also soluble and had higher IgG avidity comparing to rGST-MIC2<SUB>1-284</SUB>. These 4 highly expressed and water-soluble recombinant antigenic proteins may be promising candidates to improve the serodiagnosis of toxoplasmosis in addition to the major surface antigen of SAG1.

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Abstract
INTRODUCTION
MATERIALS AND METHODS
RESULTS
DISCUSSION
REFERENCES

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UCI(KEPA) : I410-ECN-0101-2015-510-002710543