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Proteomics

Proteomics

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...

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Related Experiment Video

Updated: May 1, 2026

Deep Proteome Profiling by Isobaric Labeling, Extensive Liquid Chromatography, Mass Spectrometry, and Software-assisted Quantification

Deep Proteome Profiling by Isobaric Labeling, Extensive Liquid Chromatography, Mass Spectrometry, and Software-assisted Quantification

Published on: November 15, 2017

The proteomics quantification dilemma.

Peter R Jungblut¹

¹Max Planck Institute for Infection Biology, Core Facility Protein Analysis, Berlin, Germany.

Journal of Proteomics

|April 1, 2014

Summary

This summary is machine-generated.

The dominant bottom-up proteomics approach is misleading for quantification when proteins have multiple species. Top-down methods offer a more realistic view but require enhanced sensitivity and throughput for broader application.

Keywords:

Bottom-up proteomics Protein species Proteoform Quantification Top-down proteomics

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Area of Science:

Proteomics
Analytical Chemistry
Biochemistry

Background:

Current proteomics predominantly uses the bottom-up approach, valued for high throughput and sensitivity.
This method, however, can be misleading for protein quantification when multiple protein species are present in a sample.

Discussion:

The protein speciation discourse, utilizing top-down procedures, offers a more realistic analysis by considering different protein species.
Top-down proteomics currently exhibits lower sensitivity compared to bottom-up methods, posing a significant challenge.

Key Insights:

Accurate protein quantification requires addressing the presence of multiple protein species.
The limitations of current top-down proteomics highlight the need for methodological advancements.

Outlook:

Future proteomics research must focus on increasing the sensitivity and throughput of top-down approaches.
Overcoming these challenges is crucial for advancing the field and enabling more comprehensive proteomic analyses.