Foot-and-mouth disease virus 2C3ABC recombinant protein as well as preparation method and application thereof
A foot-and-mouth disease virus and recombinant protein technology is applied in the field of foot-and-mouth disease virus 2C3ABC recombinant protein and its preparation, protein and its preparation, and can solve problems such as prolonging the time for response and diagnosis of foot-and-mouth disease prevention and control.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0042] Example 1 Gene cloning and expression of recombinant protein 2C3ABC (mu2C3ABC) Bacterial construction, high-level expression and purification
[0043] 1. Experimental method
[0044] 1.1 Construction of natural 2C3ABC ORF
[0045] Using the sequence of FMDV O / China / 99 (Genbank: No.AF506822) as a template, design primers for 2C3ABC gene amplification: 2C3ABC(+): 5′-CACCGGGGCACTCAAAGCACGTGACATCAAT-3′, 2C3ABC(-): 5′-AGCTAAGCTTAGTGGTGTGGTTCGGGGTCAA-3 ', the two ends of the 2C3ABC gene contain restriction sites BamHI and Hind III, and the amplified product was double-digested with BamHI and Hind III and connected to the cloning vector pGEM-T to prepare the recombinant plasmid pGEM-2C3ABC.
[0046] 1.2 Construction of mutant 2C3ABC (mu2C3ABC) ORF
[0047] The main amino acid of the 2C3ABC ORF 3C protease active site was changed from Cys at position 142 to Ser (the corresponding codon was mutated from TGC to AGC), and Cys at position 163 was changed to Gly (the corresponding...
Embodiment 2
[0070] The detection of foot-and-mouth disease nonstructural protein antibody in the vaccine of embodiment 2
[0071] Method: The stock solution of foot-and-mouth disease virus was inactivated with BEI at 25°C for 24 hours, and after preliminary purification, purification, and emulsification, the content of the purified antigen was 20-23g / L, and the effective dose was 10-20μg / ml. The agent used Montanide ISA 206 (Seppic, Paris, France), emulsified for 15 minutes at 30°C according to the instructions (50:50), placed at 4°C for 24 hours and then stirred for 10 minutes. The integrity of 146S particles in the vaccine was measured with 10-30% sucrose density Gradient and 260nm spectrophotometer detection, containing O, A, Asia Ⅰ antigen 10-20μg per dose.
[0072] Observation of the virulence of the attack virus: the attack virus O, A, and Asia Ⅰ were obtained from the Veterinary Drug Testing Institute of the Ministry of Agriculture of China. 7 TCID 50 / ml, 4×10 6 TCID 50 / ml an...
Embodiment 3
[0080] Embodiment 3 immunochromatographic strip detects foot-and-mouth disease nonstructural protein antibody
[0081] 1. Materials and methods
[0082] 1.1 Test material
[0083] Serum: 62 positive sera of FMDV O / Taiwan / 1997 strain experimentally infected 14 days later were used as susceptibility test, 254 sera of naturally uninfected pigs and 167 vaccinated pigs were used for specificity test, 96 of 254 sera One part of the serum came from specific pathogen-free pigs (SPF) pigs, and the rest came from market-bought pigs. The pigs were immunized with the current O-type pig vaccine. Six vesicular virus antisera were self-made to evaluate the possible cross-reaction between FMDV and porcine vesicular virus. 320 sera were experimentally infected with FMDV O / Taiwan / 1999 strain, at 0, 2, 4, 6, 8, 10, 14, 21, 28, 34 days after infection, used for chromatography strip method and other commercial Method comparison. Serum in the acute phase was from infected FMDV O / Taiwan / 1997 str...
PUM
Property | Measurement | Unit |
---|---|---|
molecular weight | aaaaa | aaaaa |
Sensitivity | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com