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Production, Crystallization and Structure Determination of C. difficile PPEP-1 via Microseeding and Zinc-SAD
Published on: December 30, 2016
Purification, crystallization and preliminary diffraction studies of an ectromelia virus glutaredoxin
John-Paul Bacik1, Angela M Brigley, Lisa D Channon
1Department of Medical Microbiology and Immunology, University of Alberta, Edmonton, Alberta T6G 2H7, Canada.
Summary
Ectromelia virus EVM053, a glutaredoxin, was crystallized to understand poxvirus nucleotide synthesis. This research aids in comprehending viral deoxyribonucleotide production and metabolism.
Area of Science:
- Virology
- Structural Biology
- Biochemistry
Background:
- Orthopoxviruses, including ectromelia virus, vaccinia, and smallpox, possess a unique glutaredoxin gene.
- This gene, exemplified by vaccinia's O2L, is crucial for viral deoxyribonucleotide synthesis by reducing ribonucleotide reductase.
Purpose of the Study:
- To elucidate the role of nucleotide metabolism in poxviruses.
- To characterize the ectromelia virus O2L ortholog (EVM053) through crystallization.
Main Methods:
- Crystallization of the EVM053 protein.
- X-ray diffraction data collection and processing to 1.8 A resolution.
- Analysis of crystallographic data, including space group and unit-cell parameters determination.
Main Results:
- EVM053 was successfully crystallized in space group C222(1).
- Unit-cell parameters were determined as a = 61.98, b = 67.57, c = 108.55 A.
- Diffraction data were processed to 1.8 A resolution, revealing two molecules per asymmetric unit.
Conclusions:
- The structural characterization of EVM053 provides insights into poxvirus nucleotide metabolism.
- Understanding EVM053's function can contribute to knowledge of viral replication mechanisms.
- This work lays the foundation for further studies on orthopoxvirus glutaredoxins.
