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Crystallization and Structural Determination of 8-17 DNAzyme
Hehua Liu1, Song Mao2, Jia Sheng3
1Shanghai Public Health Clinical Center, State Key Laboratory of Genetic Engineering, Collaborative Innovation Center of Genetics and Development, School of Life Sciences, Fudan University, Shanghai, China.
Methods in Molecular Biology (Clifton, N.J.)
|February 28, 2022
Summary
Researchers determined the first structure of an active RNA-cleaving DNAzyme, the 8-17 DNAzyme. This breakthrough, using co-crystallization with a viral protein, provides a new method for studying DNAzyme structures.
Area of Science:
- Biochemistry
- Structural Biology
- Molecular Biology
Background:
- DNAzymes are catalytic DNA molecules with significant application potential.
- Limited structural information exists for DNAzymes due to crystallization challenges.
- The 8-17 DNAzyme is a catalytically active RNA-cleaving DNAzyme.
Purpose of the Study:
- To determine the first crystal structure of a catalytically active RNA-cleaving DNAzyme.
- To establish protocols for DNAzyme structure determination.
- To provide insights into DNAzyme mechanisms.
Main Methods:
- Co-crystallization of the 8-17 DNAzyme with African Swine Fever Virus Polymerase X (AsfvPolX).
- Protein expression and purification of AsfvPolX.
- X-ray crystallography and structure determination.
- In vitro cleavage assays.
Main Results:
- Successfully solved the complex structure of the 8-17 DNAzyme bound to AsfvPolX.
- This represents the first reported structure of an active RNA-cleaving DNAzyme.
- Detailed protocols for DNAzyme structure determination were established.
Conclusions:
- The solved structure provides crucial insights into the mechanism of RNA-cleaving DNAzymes.
- The developed co-crystallization method can be applied to determine structures of other DNAzymes.
- This work facilitates further research and application development for DNAzymes.
