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Nano-scale proteomics approach using two-dimensional fibrin zymography combined with fluorescent SYPRO ruby dye
Nack-Shick Choi1, Ki-Hyun Yoo, Kab-Seog Yoon
1Proteome Research Laboratory, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-333, Korea.
Journal of Biochemistry and Molecular Biology
|October 8, 2004
Summary
A novel method combining two-dimensional fibrin zymography (2-D FZ) with SYPRO Ruby staining effectively identifies Bacillus sp. proteases. This technique aids in discovering specific proteases from complex protein mixtures.
Area of Science:
- Biochemistry
- Molecular Biology
- Proteomics
Background:
- SYPRO Ruby dye is a sensitive fluorescence stain for protein detection in SDS-PAGE (1-DE or 2-DE).
- Identifying specific proteases in complex biological samples remains a challenge.
Purpose of the Study:
- To develop and validate a combined two-dimensional fibrin zymography (2-D FZ) and SYPRO Ruby staining method.
- To identify proteases from Bacillus sp. DJ-4, a strain isolated from Doen-Jang.
Main Methods:
- Combined 2-D FZ with SYPRO Ruby staining to detect protease activity.
- Analyzed active spots using matrix-assisted laser desorption ionization time of flight (MALDI-TOF) mass spectrometry.
- Established proteolytic maps using casein, fibrin, and gelatin gels.
Main Results:
- Five intracellular fibrinolytic enzymes from Bacillus sp. DJ-4 were detected using 2-D FZ.
- MALDI-TOF MS analysis identified three enzymes similar to ATP-dependent protease, extracellular neutral metalloprotease, and protease of Bacillus subtilis.
- The study successfully identified extracellular proteases and established proteolytic maps.
Conclusions:
- The combined 2-D zymography and SYPRO Ruby staining system is effective for identifying specific proteases.
- This method is applicable to complex protein mixtures from various sources, including yeast and cancer cell lines.
- The developed technique facilitates the discovery of novel enzymes.