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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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Updated: Apr 8, 2026

An Integrated Approach for Microprotein Identification and Sequence Analysis

An Integrated Approach for Microprotein Identification and Sequence Analysis

Published on: July 12, 2022

MicroProteins: small size-big impact.

Tenai Eguen¹, Daniel Straub¹, Moritz Graeff¹

¹Copenhagen Plant Science Centre, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Copenhagen, Denmark.

Trends in Plant Science

|June 28, 2015

Summary

This summary is machine-generated.

MicroProteins (miPs) are small proteins that inhibit targets by forming dimers. This article clarifies miP characteristics, distinguishing true miPs from misidentified modulatory proteins and exploring their evolutionary roles.

Keywords:

MicroProteins dominant-negative effect modulatory regulation non-functional complexes short single domain transcription factor regulation

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Last Updated: Apr 8, 2026

An Integrated Approach for Microprotein Identification and Sequence Analysis

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Published on: July 12, 2022

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High-throughput Protein Expression Generator Using a Microfluidic Platform

Published on: August 23, 2012

Area of Science:

Molecular Biology
Protein Science
Bioinformatics

Background:

MicroProteins (miPs) are short proteins analogous to miRNAs, known for heterodimerizing with targets and exerting dominant-negative effects.
Recent bioinformatic studies have proposed numerous potential miPs, but many lack established miP characteristics.
Distinguishing true miPs from other regulatory proteins is crucial for understanding their biological functions.

Purpose of the Study:

To clearly define the essential characteristics of a microProtein (miP).
To differentiate true miPs from modulatory proteins that have been misidentified as miPs.
To explore the evolutionary origins of miPs and broaden the concept beyond transcription factors.

Main Methods:

Literature review and analysis of known microProteins.
Comparative analysis of protein characteristics.
Bioinformatic assessment of protein domains and dimerization capabilities.

Main Results:

Established clear criteria for identifying true microProteins based on known examples.
Identified key differences between miPs and other modulatory proteins, refuting misclassifications.
Discussed the evolutionary trajectory of miPs and their potential roles beyond transcription factors.

Conclusions:

True microProteins possess specific heterodimerization and dominant-negative activity characteristics.
Many previously identified candidates do not meet the strict definition of a microProtein.
The concept of microProteins can be extended to non-transcription factor proteins that function through dimerization.