Serological testing is important method for diagnosis of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Nucleocapsid (N) protein is the most abundant virus derived protein and strong immunogen. We aimed to find its efficient, low-cost production.SARS-CoV-2 recombinant fragment of nucleocapsid protein (rfNP; 58–419 aa) was expressed in E. coli in soluble form, purified and characterized biochemically and immunologically.Purified rfNP has secondary structure of full-length recombinant N protein, with high percentage of disordered structure (34.2%) and of β-sheet (40.7%). rfNP was tested in immunoblot using sera of COVID-19 convalescent patients. ELISA was optimized with sera of RT-PCR confirmed positive symptomatic patients and healthy individuals. IgG detection sensitivity was 96% (47/50) and specificity 97% (67/68), while IgM detection was slightly lower (94% and 96.5%, respectively).Cost-effective approach for soluble recombinant N protein fragment production ...was developed, with reliable IgG and IgM antibodies detection of SARS-CoV-2 infection.
TY - JOUR
AU - Đukić, Teodora
AU - Mladenović, Maja
AU - Stanić-Vučinić, Dragana
AU - Radosavljević, Jelena
AU - Smiljanić, Katarina
AU - Sabljić, Ljiljana
AU - Dević, Marija
AU - Ćujić, Danica
AU - Vasović, Tamara
AU - Simović, Ana
AU - Radomirović, Mirjana Ž.
AU - Ćirković-Veličković, Tanja
PY - 2021
UR - http://cherry.chem.bg.ac.rs/handle/123456789/4331
AB - Serological testing is important method for diagnosis of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Nucleocapsid (N) protein is the most abundant virus derived protein and strong immunogen. We aimed to find its efficient, low-cost production.SARS-CoV-2 recombinant fragment of nucleocapsid protein (rfNP; 58–419 aa) was expressed in E. coli in soluble form, purified and characterized biochemically and immunologically.Purified rfNP has secondary structure of full-length recombinant N protein, with high percentage of disordered structure (34.2%) and of β-sheet (40.7%). rfNP was tested in immunoblot using sera of COVID-19 convalescent patients. ELISA was optimized with sera of RT-PCR confirmed positive symptomatic patients and healthy individuals. IgG detection sensitivity was 96% (47/50) and specificity 97% (67/68), while IgM detection was slightly lower (94% and 96.5%, respectively).Cost-effective approach for soluble recombinant N protein fragment production was developed, with reliable IgG and IgM antibodies detection of SARS-CoV-2 infection.
PB - Elsevier
T2 - Virology journal
T1 - Expression, purification and immunological characterization of recombinant nucleocapsid protein fragment from SARS-CoV-2
VL - 557
SP - 15
EP - 22
DO - 10.1016/j.virol.2021.01.004
ER -
@article{
author = "Đukić, Teodora and Mladenović, Maja and Stanić-Vučinić, Dragana and Radosavljević, Jelena and Smiljanić, Katarina and Sabljić, Ljiljana and Dević, Marija and Ćujić, Danica and Vasović, Tamara and Simović, Ana and Radomirović, Mirjana Ž. and Ćirković-Veličković, Tanja",
year = "2021",
abstract = "Serological testing is important method for diagnosis of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Nucleocapsid (N) protein is the most abundant virus derived protein and strong immunogen. We aimed to find its efficient, low-cost production.SARS-CoV-2 recombinant fragment of nucleocapsid protein (rfNP; 58–419 aa) was expressed in E. coli in soluble form, purified and characterized biochemically and immunologically.Purified rfNP has secondary structure of full-length recombinant N protein, with high percentage of disordered structure (34.2%) and of β-sheet (40.7%). rfNP was tested in immunoblot using sera of COVID-19 convalescent patients. ELISA was optimized with sera of RT-PCR confirmed positive symptomatic patients and healthy individuals. IgG detection sensitivity was 96% (47/50) and specificity 97% (67/68), while IgM detection was slightly lower (94% and 96.5%, respectively).Cost-effective approach for soluble recombinant N protein fragment production was developed, with reliable IgG and IgM antibodies detection of SARS-CoV-2 infection.",
publisher = "Elsevier",
journal = "Virology journal",
title = "Expression, purification and immunological characterization of recombinant nucleocapsid protein fragment from SARS-CoV-2",
volume = "557",
pages = "15-22",
doi = "10.1016/j.virol.2021.01.004"
}
Đukić, T., Mladenović, M., Stanić-Vučinić, D., Radosavljević, J., Smiljanić, K., Sabljić, L., Dević, M., Ćujić, D., Vasović, T., Simović, A., Radomirović, M. Ž.,& Ćirković-Veličković, T.. (2021). Expression, purification and immunological characterization of recombinant nucleocapsid protein fragment from SARS-CoV-2. in Virology journal
Elsevier., 557, 15-22.
https://doi.org/10.1016/j.virol.2021.01.004
Đukić T, Mladenović M, Stanić-Vučinić D, Radosavljević J, Smiljanić K, Sabljić L, Dević M, Ćujić D, Vasović T, Simović A, Radomirović MŽ, Ćirković-Veličković T. Expression, purification and immunological characterization of recombinant nucleocapsid protein fragment from SARS-CoV-2. in Virology journal. 2021;557:15-22.
doi:10.1016/j.virol.2021.01.004 .
Đukić, Teodora, Mladenović, Maja, Stanić-Vučinić, Dragana, Radosavljević, Jelena, Smiljanić, Katarina, Sabljić, Ljiljana, Dević, Marija, Ćujić, Danica, Vasović, Tamara, Simović, Ana, Radomirović, Mirjana Ž., Ćirković-Veličković, Tanja, "Expression, purification and immunological characterization of recombinant nucleocapsid protein fragment from SARS-CoV-2" in Virology journal, 557 (2021):15-22,
https://doi.org/10.1016/j.virol.2021.01.004 . .
