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Related Concept Videos

Proteomics01:33

Proteomics

7.3K
A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term...
7.3K

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Updated: Jun 18, 2025

Large-scale Top-down Proteomics Using Capillary Zone Electrophoresis Tandem Mass Spectrometry
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Deep Profiling of Plasma Proteoforms with Engineered Nanoparticles for Top-down Proteomics.

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    We developed a nanoparticle protein corona method to enrich low-abundance proteins in human plasma. This technique significantly increases proteome depth, enabling detection of previously unobserved proteoforms for deeper clinical proteomics research.

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    Area of Science:

    • Proteomics
    • Biochemistry
    • Nanotechnology

    Background:

    • Human plasma proteome analysis faces a dynamic range challenge, limiting detection of low-abundance proteins and proteoforms.
    • Existing methods struggle to identify proteins beyond highly abundant ones like albumin and immunoglobins.

    Purpose of the Study:

    • To develop a novel method for enriching low-abundant proteins and proteoforms from human plasma.
    • To enhance the depth and sensitivity of proteomic analysis in clinical samples.

    Main Methods:

    • Utilized a nanoparticle protein corona approach for selective and reproducible enrichment of plasma proteins.
    • Employed top-down proteomics to quantify differential enrichment and identify proteoforms.
    • Analyzed 2841 proteoforms from 114 proteins in enriched human plasma.

    Main Results:

    • Achieved detection of proteoforms across a wide abundance range (∼1 µg/mL to ∼10 pg/mL).
    • Demonstrated up to a 10^5-fold increase in proteome depth compared to neat plasma.
    • Identified numerous low- and medium-abundance proteoforms involved in immunity and cell signaling.

    Conclusions:

    • Nanoparticle enrichment significantly expands the detectable proteome in human plasma.
    • This method enables deeper proteoform sequencing, advancing clinical proteomics for disease and aging studies.
    • The approach extends proteoform research beyond abundant proteins, revealing new biological insights.