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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 proteomics...

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Related Experiment Video

Updated: Jul 5, 2026

Bacterial Peptide Display for the Selection of Novel Biotinylating Enzymes

Bacterial Peptide Display for the Selection of Novel Biotinylating Enzymes

Published on: October 3, 2019

mRNA-display-based selections for proteins with desired functions: a protease-substrate case study.

C Alexander Valencia¹, Steven W Cotten, Biao Dong

¹School of Pharmacy and Carolina Center for Genomic Sciences, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA.

Biotechnology Progress

|May 13, 2008

Summary

Messenger RNA (mRNA)-display is a powerful in vitro protein selection method. This technique enables the identification of affinity reagents, binding partners, and enzyme substrates from large libraries.

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Published on: May 25, 2018

Area of Science:

Biochemistry
Molecular Biology
Proteomics

Background:

Messenger RNA (mRNA)-display is an amplification-based, in vitro protein selection technique.
It overcomes limitations of traditional methods like yeast two-hybrid and phage display.
The covalent linkage of genotype to phenotype allows for efficient sequence reading and amplification.

Purpose of the Study:

To review recent advancements in mRNA-display for identifying various protein types.
To provide a detailed guide for researchers new to mRNA-display.
To address the advantages and limitations of mRNA-display as a protein selection tool.

Main Methods:

Generation of an mRNA-displayed proteome library.
Removal of abundant or non-specific sequences.
Iterative selection rounds to identify proteins with desired functions, exemplified by caspase substrate identification.

Main Results:

Demonstrated successful application of mRNA-display for identifying natural substrates of caspases.
Highlighted the technique's capability to handle libraries with 10(12)-10(13) diversity.
Provided a practical case study for implementing mRNA-display.

Conclusions:

mRNA-display is a versatile and powerful tool for selecting peptides and proteins.
The technique facilitates the discovery of affinity reagents, binding partners, and enzyme substrates.
Detailed analysis and case study aim to lower the barrier for adopting mRNA-display in research labs.