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[Expression and purification of recombinant hirudin]
Zhonghua Xue Ye Xue Za Zhi = Zhonghua Xueyexue Zazhi
|March 13, 2001
Summary
Recombinant hirudin variant 1 (rHV1) was successfully expressed in E. coli, achieving significant biological activity. This study details the purification of active rHV1, marking a first in China.
Area of Science:
- Biotechnology
- Molecular Biology
- Biochemistry
Background:
- Hirudin variant 1 is a potent anticoagulant.
- Efficient expression and purification of recombinant hirudin are crucial for therapeutic applications.
Purpose of the Study:
- To express biologically active recombinant hirudin variant 1 (rHV1) in prokaryotic cells.
- To isolate and purify the expressed rHV1 for potential therapeutic use.
Main Methods:
- Hirudin variant 1 gene expression in E. coli DH5 alpha using plasmid vector pBV220.
- Determination of biological activity using a chromogenic substrate method.
- Purification via ultrafiltration, DEAE-Sephadex A-50, and thrombin-Sepharose 4B affinity chromatography.
Main Results:
- Expressed rHV1 constituted approximately 16.9% of E. coli cell proteins.
- The rHV1 exhibited biological activity of 20-30 ATU/mL.
- Purified rHV1 presented a homogeneous band on SDS-PAGE, indicating high purity.
Conclusions:
- Successful expression and purification of biologically active rHV1 in E. coli.
- This represents the first report of hirudin variant 1 gene expression and rHV1 purification in China.
- The developed method provides a foundation for large-scale production of active hirudin.