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Chinese Journal of Clinicians(Electronic Edition) ›› 2023, Vol. 17 ›› Issue (02): 195-201. doi: 10.3877/cma.j.issn.1674-0785.2023.02.015

• Basic Science Research • Previous Articles     Next Articles

Purification and characterization of MAP30 by immunoaffinity chromatography

Zihao Qiang, Yiping Zhou, Di Yang, Yanli Wu, Yongjia Zhang, Xiang Fan, Gangrui Li, Yanfa Meng, Yao Meng()   

  1. School of Laboratory Medicine, Chengdu Medical College, Chengdu 610500, China
    College of Life Sciences, Sichuan University, Chengdu 610064, China
  • Received:2022-02-15 Online:2023-02-15 Published:2023-07-10
  • Contact: Yao Meng

Abstract:

Objective

To establish an immunoaffinity chromatography method for rapid purification of MAP30 polypeptide (a momordica toxin).

Methods

New Zealand white rabbits (male) were immunized with the toxin MAP30 as an antigen to prepare antiserum. Polyclonal antibodies were purified by Mabselect affinity chromatography. Synthesized antibody-Sepharose 2B affinity chromatography medium using Sepharose 2B as a matrix coupled with polyclonal antibody was used to purify the momordica toxin MAP30.

Results

The MAP30 toxin purified with the self-made immunoaffinity medium showed a single color band under reducing conditions on SDS-PAGE, and the corresponding relative molecular weights were all 30 kDa. The total sugar content measured by the sulfate-anthrone method was 1.54%. PC12 cells were used as the test cell type, and the maximum inhibition rate of MAP30 (anti-tumor activity) was 90%.

Conclusion

The structure, properties, and activity characteristics of the purified target protein-MAP30 in this study are consistent with those reported in the literature, which suggests that the immunoaffinity chromatography method established in this study is feasible for the separation and purification of MAP30.

Key words: Immunoaffinity chromatography, MAP30, RIP, Polyclonal antibody

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