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Expression and purification of functional recombinant CUL2•RBX1 from E. coli
Stephanie Diaz1, Lihong Li1,2, Kankan Wang1
1Department of Biochemistry, Purdue University, West Lafayette, IN, USA.
Scientific Reports
|May 28, 2021
Summary
Researchers developed cost-effective methods to produce pure, functional Cullin-2 (CUL2) proteins in E. coli. These advancements aid studies on CRL2s, crucial E3 ligases involved in development and disease.
Area of Science:
- Molecular Biology
- Biochemistry
- Cellular Biology
Background:
- Cullin-2 (CUL2)-based cullin-RING ligases (CRL2s) are vital E3 ubiquitin ligases in multicellular organisms, regulating key cellular processes.
- CRL2s are implicated in embryogenesis, viral pathogenesis, and diseases, making them therapeutic targets.
- The VHL protein, a CRL2 substrate receptor, targets hypoxia-inducible factor α (HIF1α) for degradation.
Purpose of the Study:
- To develop efficient and cost-effective methods for producing recombinant human CUL2 protein.
- To facilitate further research into the mechanisms and regulation of CRL2s.
- To provide functional CUL2 protein for in vitro studies.
Main Methods:
- Expression and purification of recombinant human CUL2 protein from E. coli.
- Assessment of protein purity using biochemical assays.
- In vitro assays to confirm binding to substrate receptor modules and enzymatic activity.
Main Results:
- Two cost-effective systems for CUL2 expression and purification were established.
- Purified CUL2 proteins achieved ~95% purity.
- The purified CUL2 proteins demonstrated substrate binding and enzymatic activity in vitro.
Conclusions:
- The developed methods efficiently produce highly pure and functional recombinant human CUL2.
- These advancements will significantly aid research into CRL2 function, regulation, and therapeutic potential.
- The availability of reliable CUL2 protein preparations is crucial for advancing CRL2-related biomedical research.
