A universal matrix-assisted laser desorption/ionization cleavable cross-linker for protein structure analysis.
Mathias Q Müller1, Johannes J Zeiser, Frank Dreiocker
1Department of Pharmaceutical Chemistry & Bioanalytics, Institute of Pharmacy, Martin-Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany.
Rapid Communications in Mass Spectrometry : RCM
|December 16, 2010
Summary
A new dissociative amine-reactive cross-linker simplifies protein structure analysis using mass spectrometry. This method enhances the identification of protein conformation and interactions, reducing false positives for automated structural studies.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Structural Biology
Background:
- Protein cross-linking coupled with mass spectrometry offers insights into protein structure and interactions.
- Existing methods can be complex and prone to false-positive results.
Purpose of the Study:
- To evaluate the universal applicability of a novel dissociative amine-reactive cross-linker (NHS-BuUrBu-NHS) for protein structure analysis.
- To demonstrate its utility in matrix-assisted laser desorption/ionization tandem mass spectrometry (MALDI-MS/MS).
Main Methods:
- Utilized a dissociative amine-reactive cross-linker (NHS-BuUrBu-NHS).
- Applied matrix-assisted laser desorption/ionization tandem mass spectrometry (MALDI-MS/MS).
- Analyzed peptides (substance P, LHRH) and a protein domain (PPARα).
Main Results:
- The cross-linker proved universally applicable across different sample types.
- Characteristic fragment ion patterns and neutral losses simplified identification of cross-linked species.
- Reduced the incidence of false-positive cross-link identifications.
Conclusions:
- The NHS-BuUrBu-NHS cross-linker is highly effective for protein structure and interaction analysis.
- Its characteristics facilitate simplified and accurate identification of cross-linked peptides and proteins.
- This approach holds significant potential for automated protein structural studies.
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