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Peptidomics Methods Applied to the Study of Flower Development
Raquel Álvarez-Urdiola1, Eva Borràs2,3, Federico Valverde4
1Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, Edifici CRAG, Campus UAB, Cerdanyola del Vallès, Barcelona, Spain.
Methods in Molecular Biology (Clifton, N.J.)
|August 4, 2023
Summary
This study explores novel peptides in plants using advanced proteomics. It details methods for extracting and identifying these small, uncharacterized polypeptides (SEPs) for better understanding plant development.
Area of Science:
- Plant biology
- Proteomics
- Molecular biology
Background:
- Plant development requires understanding the proteome, including the poorly characterized peptidome.
- Novel, functional peptides encoded by small open reading frames (sORFs) are increasingly being discovered through ribosome profiling.
- Identifying these small open reading frame-encoded polypeptides (SEPs) is crucial for a complete view of plant biology.
Purpose of the Study:
- To outline experimental and computational strategies for validating the accumulation of sORF-encoded polypeptides (SEPs) in plant tissues.
- To present robust protocols for peptide extraction and identification in plants.
- To address the challenges associated with detecting small and novel peptides.
Main Methods:
- Two distinct peptide extraction protocols from plant tissues.
- Peptide identification using liquid chromatography-tandem mass spectrometry (LC-MS/MS).
- Application of both database search and de novo identification methods for novel peptide discovery.
Main Results:
- Demonstration of methods to detect and identify small (up to ~100 amino acids) and novel peptides.
- Validation of accumulation of sORF-encoded polypeptides (SEPs) in plant tissues.
- Successful application of LC-MS/MS for comprehensive peptidome analysis.
Conclusions:
- Advanced proteomics and computational methods are essential for characterizing the plant peptidome.
- The presented protocols enable the discovery and validation of novel, functional peptides.
- This work contributes to a deeper understanding of plant developmental processes through peptidome exploration.
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