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[Antigen selection, optimized expression and polyclonal antibody preparation of O-GlcNAcase]
Lin Lin1, Guochao Li, Zhonghua Li
1College of Pharmacy and State Key Laboratory of Element-Organic Chemistry, Nankai University, Tianjin 300071, China.
Sheng Wu Gong Cheng Xue Bao = Chinese Journal of Biotechnology
|November 22, 2011
Summary
Researchers developed a specific O-GlcNAcase (OGA) antibody crucial for studying O-GlcNAc biological functions and related diseases. This antibody demonstrates high specificity and sensitivity, enabling further research into OGA
Area of Science:
- Biochemistry
- Immunology
- Molecular Biology
Background:
- O-linked N-acetylglucosamine (O-GlcNAc) is a dynamic post-translational modification.
- Understanding O-GlcNAcase (OGA) is vital for elucidating O-GlcNAc metabolism and associated disease pathogenesis.
- A specific and potent OGA antibody is essential for these investigations.
Purpose of the Study:
- To generate a high-affinity polyclonal antibody targeting O-GlcNAcase (OGA).
- To validate the antibody's specificity and sensitivity for OGA isoforms.
- To facilitate biological function studies of OGA.
Main Methods:
- Recombinant expression and purification of a soluble OGA fragment (sOGA) in E. coli.
- Immunization of New Zealand rabbits with purified sOGA.
- Affinity purification of anti-sOGA antibodies using CNBr-activated Sepharose 4B.
- Validation via SDS-PAGE, Western blotting, and ELISA.
Main Results:
- Successfully expressed and purified sOGA (45 kDa, >95% purity).
- Generated a specific polyclonal antibody against OGA.
- The antibody recognized three OGA isoforms with high specificity.
- Achieved high sensitivity (0.11 ng/mL) and titer (1:80,000) via Western blot and ELISA.
Conclusions:
- A potent and specific polyclonal antibody against OGA was successfully prepared.
- The developed antibody is suitable for detecting OGA isoforms in biological samples.
- This antibody will be a valuable tool for studying OGA's biological functions and disease relevance.
