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10.1016/j.virol.2021.01.004

http://scihub22266oqcxt.onion/10.1016/j.virol.2021.01.004
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33582454!7871913!33582454
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suck abstract from ncbi


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pmid33582454      Virology 2021 ; 557 (ä): 15-22
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  • Expression, purification and immunological characterization of recombinant nucleocapsid protein fragment from SARS-CoV-2 #MMPMID33582454
  • Djukic T; Mladenovic M; Stanic-Vucinic D; Radosavljevic J; Smiljanic K; Sabljic L; Devic M; Cujic D; Vasovic T; Simovic A; Radomirovic M; Cirkovic Velickovic T
  • Virology 2021[May]; 557 (ä): 15-22 PMID33582454show ga
  • 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 beta-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.
  • |Amino Acid Sequence[MESH]
  • |Antibodies, Viral/*blood[MESH]
  • |COVID-19 Serological Testing/methods[MESH]
  • |COVID-19/blood/*diagnosis/immunology[MESH]
  • |Case-Control Studies[MESH]
  • |Cloning, Molecular[MESH]
  • |Coronavirus Nucleocapsid Proteins/genetics/*immunology[MESH]
  • |Enzyme-Linked Immunosorbent Assay/*methods/standards[MESH]
  • |Escherichia coli/genetics/metabolism[MESH]
  • |Gene Expression[MESH]
  • |Genetic Vectors/chemistry/metabolism[MESH]
  • |Immune Sera/chemistry[MESH]
  • |Immunoglobulin G/*blood[MESH]
  • |Immunoglobulin M/blood[MESH]
  • |Phosphoproteins/genetics/immunology[MESH]
  • |Recombinant Proteins/genetics/immunology[MESH]
  • |Reverse Transcriptase Polymerase Chain Reaction[MESH]
  • |SARS-CoV-2/genetics/*immunology[MESH]


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