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Synthesis of Functionalized Magnetic Nanoparticles, Their Conjugation with the Siderophore Feroxamine and its Evaluation for Bacteria Detection
Published on: June 16, 2020
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Ultradeep Palmitoylomics Enabled by Dithiodipyridine-Functionalized Magnetic Nanoparticles.
Xiaoqin Zhang1, Yuting Zhang2, Caiyun Fang1
1Department of Chemistry and Institutes of Biomedical Sciences , Fudan University , Shanghai 200433 , China.
Analytical Chemistry
|April 17, 2018
Summary
Researchers developed novel magnetic microspheres for ultradeep identification of protein palmitoylation. This method enables sensitive enrichment and global annotation of palmitoylated proteins, advancing our understanding of cellular processes.
Area of Science:
- Biochemistry
- Proteomics
- Materials Science
Background:
- Palmitoylation, a critical post-translational modification involving fatty acylation, plays a significant role in numerous biological functions.
- Accurate and comprehensive identification of palmitoylated proteins is essential for understanding cellular signaling and disease mechanisms.
Purpose of the Study:
- To develop a novel enrichment strategy for the ultradeep identification of protein palmitoylation.
- To create a highly selective and sensitive method for capturing and isolating palmitoylated peptides from complex biological samples.
Main Methods:
- Synthesis of novel magnetic microspheres (Fe3O4/SiO2-SSPy) modified with 2,2'-dithiodipyridine.
- Utilized magnetic properties and surface functional groups for direct capture and isolation of palmitoylated targets.
- Employed the microspheres for enrichment of palmitoylated peptides from complex mixtures.
Main Results:
- Achieved remarkable enrichment selectivity, purifying palmitoylated peptides at a 1:500 molar ratio.
- Demonstrated high sensitivity with a detection limit at the femtomole level.
- Successfully identified 1304 putative palmitoylated proteins from mouse brain tissues, creating the largest mouse palmitoylome dataset to date.
Conclusions:
- The novel Fe3O4/SiO2-SSPy microsphere approach enables efficient and sensitive enrichment for global palmitoylation annotation.
- This method facilitates the discovery of novel palmitoylated proteins and pathways, significantly advancing the field of palmitoylomics.
- The developed technique is crucial for comprehensive analysis of protein palmitoylation in complex biological systems.
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