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Rebuilding Ring-Type Assembly of Peroxiredoxin by Chemical Modification
Tomoki Himiyama1,2, Yuko Tsuchiya3, Yasushige Yonezawa4
1Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology, Ikeda, Osaka 563-8577, Japan.
Bioconjugate Chemistry
|December 18, 2020
Summary
Researchers controlled protein quaternary structure (QS) by mutating peroxiredoxin from Aeropyrum pernix K1 (ApPrx). They disrupted and rebuilt ApPrx QS using amino acid mutations and chemical modifications, offering a new method for protein assembly regulation.
Area of Science:
- Biochemistry
- Structural Biology
- Protein Engineering
Background:
- Controlling protein quaternary structure (QS) is complex.
- Peroxiredoxin from Aeropyrum pernix K1 (ApPrx) naturally forms a decameric ring structure.
Purpose of the Study:
- To investigate methods for disrupting and reconstituting ApPrx QS.
- To develop a facile approach for regulating protein assembly states.
Main Methods:
- Amino acid mutations were introduced into ApPrx to disrupt QS.
- Chemical modifications were applied to mutated ApPrx to reconstitute QS.
- Structural analysis was used to confirm the reconstituted structures.
Main Results:
- A mutant ApPrx*F80C was generated, disrupting the decameric structure into dimers.
- Chemical modification of dimeric ApPrx*F80C successfully reassembled a decameric structure.
- An additional mutation allowed for the rebuilding of a dodecameric structure.
Conclusions:
- Protein QS can be disrupted and reconstituted using targeted mutations and chemical modifications.
- Artificially installed chemical moieties can facilitate protein-protein interactions to rebuild native structures.
- This study presents a straightforward method for controlling protein assembly states.
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