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Updated: Jun 27, 2026
Combining Wet and Dry Lab Techniques to Guide the Crystallization of Large Coiled-coil Containing Proteins
Published on: January 6, 2017
Crystallization and preliminary X-ray diffraction analysis of a breast cancer metastasis suppressor 1 predicted
Mercedes Spínola-Amilibia1, José Rivera, Jerónimo Bravo
1Signal Transduction Group, Centro Nacional de Investigaciones Oncológicas, Melchor Fernández Almagro 3, E-28029 Madrid, Spain.
Abstract:
Breast cancer metastasis suppressor 1 (BRMS1) is an inhibitor of metastatic progression and plays a role in several steps of the metastatic cascade. Apart from the ability of BRMS1 to negatively regulate metastasis formation in breast, melanoma and ovarian tumours, very little is known about the molecular aspects of the antimetastatic properties of BRMS1. Here, the expression, purification and crystallization of a functional fragment of human BRMS1 that is predicted to be a coiled-coil region are reported. The purified fragment crystallized in space group C222(1) using the vapour-diffusion method. The unit-cell parameters were a = 42.6, b = 191.3, c = 71.9 A. The crystals diffracted to 2.0 A resolution and a complete data set was collected under cryoconditions. This is the first structural report of BRMS1.
Insights
Breast cancer metastasis suppressor 1 (BRMS1) inhibits tumor spread. Researchers purified and crystallized a BRMS1 fragment, achieving the first structural insights into this metastasis suppressor protein.
Area of Science:
- Molecular Biology
- Structural Biology
- Oncology
Background:
- Breast cancer metastasis suppressor 1 (BRMS1) is a known inhibitor of tumor metastasis.
- Its precise molecular mechanisms underlying anti-metastatic properties remain largely uncharacterized.
- BRMS1's role extends to breast, melanoma, and ovarian cancers.
Purpose of the Study:
- To elucidate the molecular underpinnings of BRMS1's anti-metastatic function.
- To obtain structural information of a functional BRMS1 fragment.
Main Methods:
- Expression and purification of a functional human BRMS1 coiled-coil fragment.
- Crystallization using the vapor-diffusion method.
- X-ray diffraction data collection under cryoconditions.
Main Results:
- A functional fragment of human BRMS1 was successfully expressed and purified.
- The fragment was crystallized in space group C222(1).
- High-resolution diffraction data (2.0 A) were collected, providing the first structural report of BRMS1.
Conclusions:
- This study reports the first structural characterization of BRMS1.
- The obtained structural data provides a foundation for understanding BRMS1's role in inhibiting cancer metastasis.
- Further structural studies may reveal novel therapeutic targets for metastasis suppression.