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Recombinant Protein Expression for Structural Biology in HEK 293F Suspension Cells: A Novel and Accessible Approach
Published on: October 16, 2014
Increased yield of high-purity and active tetrameric recombinant human EC-SOD by solid phase refolding
Kang Ryu1, Young-Hoon Kim, Younghwa Kim
1Laboratory of Dermato-Immunology, College of Medicine, The Catholic University of Korea, Seoul 130-701, Korea.
Journal of Microbiology and Biotechnology
|October 29, 2008
Summary
A new solid-phase refolding method efficiently purifies recombinant human extracellular superoxide dismutase (rEC-SOD) to its active tetramer form. This process enhances the yield and purity of rEC-SOD for therapeutic applications.
Area of Science:
- Biochemistry
- Protein Purification
- Enzymology
Background:
- Superoxide dismutase (SOD) is crucial for removing reactive oxygen species.
- Extracellular superoxide dismutase (EC-SOD) functions as a tetramer in extracellular spaces.
- Recombinant human EC-SOD (rEC-SOD) purification is vital for therapeutic development.
Purpose of the Study:
- To develop an optimized solid-phase refolding procedure for rEC-SOD.
- To achieve high purity and native tetramer conformation of rEC-SOD.
- To enhance the yield of rEC-SOD for potential therapeutic use.
Main Methods:
- Combined immobilized metal affinity chromatography (IMAC) and gel filtration chromatography.
- Solid-phase refolding of rEC-SOD eluted from a Ni(2+)-column in Tris buffer.
- Purification using a Superose 12PC 3.2/30 column.
Main Results:
- Achieved greater than 90% tetramer formation after refolding.
- Obtained greater than 99% purity of the rEC-SOD tetramer.
- Demonstrated specific activities via DCFHDA assay.
Conclusions:
- The described chromatographic purification method yields highly pure rEC-SOD in its native tetramer form.
- This improved purification strategy promises to advance the development and therapeutic applications of rEC-SOD.
- The solid-phase refolding approach offers an efficient means to produce biologically potent rEC-SOD.
