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Related Experiment Video

Updated: Jun 15, 2026

Identification of Protein Interaction Partners in Mammalian Cells Using SILAC-immunoprecipitation Quantitative Proteomics

Identification of Protein Interaction Partners in Mammalian Cells Using SILAC-immunoprecipitation Quantitative Proteomics

Published on: July 6, 2014

Why inverse proteins are relatively abundant.

Jean-Christophe Nebel¹, Claude Godfrey Charles Walawage

¹Faculty of Computing, Information Systems and Mathematics, Kingston University, Kingston-upon-Thames, KT1 2EE, UK. J.Nebel@kingston.ac.uk

Protein and Peptide Letters

|March 9, 2010

Summary

Inverse proteins are abundant because their repeat patterns mimic existing protein sequences. This structural similarity, including amino acid propensity, explains their prevalence in biological systems.

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Quantitative Measurement of Intrathecally Synthesized Proteins in Mice

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Published on: November 29, 2019

Area of Science:

Proteomics
Bioinformatics
Structural Biology

Background:

Inverse proteins are observed to be relatively abundant in biological systems.
The underlying reasons for this abundance are not fully understood.
Previous research suggests potential links between protein structure and abundance.

Purpose of the Study:

To investigate whether shared repeat patterns explain the abundance of inverse proteins.
To determine the role of repeat structures in protein sequence similarity.
To confirm the presence of repeats in inverse proteins.

Main Methods:

Generation of an artificial set of peptide sequences with specific repeat features.
Comparison of artificial sequences with a random set of peptide sequences.
Analysis of repeat patterns and amino acid propensity in inverse proteins.

Main Results:

The presence of repeats was shown to contribute significantly to protein sequence similarity.
Further analysis confirmed that the majority of inverse proteins exhibit distinct repeat structures.
Artificial peptide sequences with repeat features mirrored characteristics of natural proteins.

Conclusions:

The relative abundance of inverse proteins is likely due to their shared repeat structures and amino acid propensities with existing proteins.
Repeat patterns play a crucial role in the evolutionary and functional prevalence of certain protein types.
This finding provides a mechanistic explanation for the observed abundance of inverse proteins.