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Matrix-assisted Laser Desorption/Ionization Time of Flight (MALDI-TOF) Mass Spectrometric Analysis of Intact Proteins Larger than 100 kDa
Published on: September 9, 2013
Protein identification by MALDI-TOF mass spectrometry.
1Proteomics Research Group, Babraham Institute, Babraham, UK.
Methods in Molecular Biology (Clifton, N.J.)
|October 4, 2011
Summary
This study presents a straightforward protocol for protein identification using matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF-MS). The method enables sensitive analysis of proteins from gel electrophoresis in standard biochemistry labs.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Proteomics
Background:
- Matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF-MS) is widely accessible for biomolecular analysis.
- Protein identification via peptide mass fingerprinting (PMF) is a key application of MALDI-TOF-MS.
Purpose of the Study:
- To describe a simple, accessible protocol for protein identification using MALDI-TOF-MS.
- To enable protein identification at femtomole levels from gel-separated samples in standard laboratories.
Main Methods:
- Proteins are separated by 1D or 2D gel electrophoresis.
- In-gel trypsin digestion is performed on excised spots or bands.
- Peptide mass fingerprinting (PMF) is generated using MALDI-TOF-MS.
- Database searching is used to identify proteins from PMF data.
Main Results:
- The protocol allows for protein identification at femtomole sensitivity levels.
- Up to 96 samples can be processed manually per run.
- The method is suitable for standard biochemistry laboratories.
Conclusions:
- This protocol offers a simple and effective method for protein identification.
- It democratizes access to advanced proteomic analysis in non-specialist settings.
- The technique facilitates rapid and sensitive biomolecular analysis.
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