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Crystallographic refinement of trichosanthin at 2.6A resolution
1Fujian Institute of Research on the Structure of Matter, Academia Sinica, Fuzhou, PRC.
Science in China. Series B, Chemistry, Life Sciences & Earth Sciences
|October 1, 1992
Summary
Researchers refined the trichosanthin molecule model using improved electron density maps and crystallographic data. This structural analysis provides a detailed understanding of trichosanthin
Area of Science:
- Biochemistry
- Structural Biology
- Crystallography
Background:
- Trichosanthin is a protein with potential biological applications.
- Previous models of trichosanthin existed but required refinement.
- Understanding protein structure is crucial for function elucidation.
Purpose of the Study:
- To rebuild and refine the molecular model of trichosanthin.
- To achieve a high-resolution structural determination.
- To provide an accurate atomic model for further research.
Main Methods:
- Utilized improved electron density maps with solvent flattening.
- Applied crystallographic refinement using restrained least-squares.
- Employed diffraction data to a resolution of 2.6 Å.
Main Results:
- Successfully refined two trichosanthin molecules (3828 non-hydrogen atoms).
- Achieved an R factor of 0.223.
- Obtained an r.m.s. deviation of bond length of 0.023 Å.
Conclusions:
- The new molecular model of trichosanthin is in excellent agreement with electron density maps.
- This refined structure serves as a reliable basis for future studies.
- The structural data enhances our understanding of trichosanthin.