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Crystallization and preliminary X-ray diffraction studies of dogfish C-reactive protein
C T Samudzi1, N Y Nguyen, J R Rubin
1NGI-Frederick Cancer Research and Development Center, ABL-Basic Research Program, Maryland 21702.
Proteins
|January 1, 1993
Summary
Researchers crystallized dogfish C-reactive protein (CRP) for structural analysis. The triclinic crystals diffracted X-rays to 2.6 A resolution, revealing two hexamers per asymmetric unit.
Area of Science:
- Biochemistry
- Structural Biology
- X-ray Crystallography
Background:
- C-reactive protein (CRP) is a key acute-phase protein involved in innate immunity.
- Understanding CRP structure is crucial for elucidating its function in various species.
Purpose of the Study:
- To obtain high-quality crystals of dogfish (Mustelus canis) CRP.
- To determine the crystal structure of dogfish CRP.
Main Methods:
- Crystallization was achieved using vapor phase equilibration with ammonium sulfate.
- X-ray diffraction data were collected to determine the crystal's space group and unit cell dimensions.
Main Results:
- Dogfish CRP crystallized in the P1 space group with triclinic lattice dimensions.
- Unit cell parameters: a = 82.91, b = 92.25, c = 103.40 A; alpha = 83.36, beta = 89.76, gamma = 81.30 degrees.
- The crystals diffracted to 2.6 A resolution and contained two hexamers in the asymmetric unit.
Conclusions:
- The successful crystallization and initial structural data provide a foundation for detailed structural studies of dogfish CRP.
- This work contributes to comparative studies of CRP structure and evolution across different species.