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A clickable probe for versatile characterization of S-nitrosothiols.
Jenna L Clements1, Franziska Pohl1, Pandi Muthupandi2
1Department of Medicine, Washington University Medical School, St. Louis, MO, 63110, USA.
Redox Biology
|September 11, 2020
Summary
Researchers developed PBZyn, a new clickable probe for labeling S-nitrosylation (SNOs). This versatile tool allows for multi-modal analysis, advancing the study of SNOs in cellular signaling and protein regulation.
Area of Science:
- Biochemistry
- Cellular Biology
- Chemical Biology
Background:
- S-nitrosylation (SNO) is a critical post-translational modification of cysteine thiols involved in cellular signaling.
- Existing SNO-detection probes are limited by single analytical modalities, hindering comprehensive cellular and biochemical assays.
Purpose of the Study:
- To develop a novel, versatile chemical probe for the detection and analysis of S-nitrosylation in biological systems.
- To enable multi-modal analysis of SNOs through a single labeling strategy.
Main Methods:
- Development of 'PBZyn', a clickable, alkyne-containing SNO probe utilizing an o-phosphino-benzoyl warhead.
- Application of PBZyn for in situ cellular imaging, protein blotting, affinity purification, and mass spectrometry.
Main Results:
- PBZyn successfully labels S-nitrosylated cysteine thiols in cellular contexts.
- The probe facilitates multi-modal analysis, including imaging, blotting, purification, and mass spectrometry-based quantification of SNOs.
- Demonstrated the probe's utility in various biochemical and cellular assays.
Conclusions:
- PBZyn offers a flexible and powerful new tool for studying S-nitrosylation.
- This multi-modal probe will significantly advance research into the regulation and function of SNOs in biological processes.
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