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Crystallization and synchrotron X-ray diffraction studies of human interleukin-22
R A P Nagem1, K W Lucchesi, D Colau
1Laboratório Nacional de Luz Síncrotron, Caixa Postal 6192, CEP 13083-970, Campinas, SP, Brazil.
Acta Crystallographica. Section D, Biological Crystallography
|February 22, 2002
Summary
Researchers crystallized human interleukin-22 (IL-22), a novel cytokine. X-ray diffraction revealed its crystal structure, providing insights into this important immune protein.
Area of Science:
- Biochemistry
- Structural Biology
- Immunology
Background:
- Interleukin-22 (IL-22) is a recently identified cytokine.
- Cytokines play crucial roles in immune responses and inflammation.
Purpose of the Study:
- To determine the crystal structure of human interleukin-22 (IL-22).
- To provide a structural basis for understanding IL-22 function.
Main Methods:
- Human IL-22 was purified and crystallized using hanging drop vapour-diffusion method.
- X-ray diffraction data were collected using synchrotron radiation.
Main Results:
- Human IL-22 crystallized in space group P2(1)2(1)2(1).
- Unit-cell parameters were determined as a = 55.44, b = 61.62, c = 73.43 Å.
- The crystals diffracted X-rays to a resolution better than 2.00 Å.
Conclusions:
- The successful crystallization and diffraction of human IL-22 enable detailed structural analysis.
- This structural information will be vital for understanding IL-22's interactions and biological functions.