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Updated: Jul 14, 2026
08:52
Measurement of Protein Turnover Rates in Senescent and Non-Dividing Cultured Cells with Metabolic Labeling and Mass Spectrometry
Published on: April 6, 2022
About the interrelation of evolutionary rate and protein age
Hannes Luz1, Eike Staub, Martin Vingron
1Computational Molecular Biology Department, Max Planck Institute for Molecular Genetics, Ihnestr. 73, 14195 Berlin, Germany. hannes.luz@molgen.mpg.de
Summary
Younger proteins evolve faster than older ones, with gene duplication events occurring more recently for these rapidly evolving genes. This finding highlights the relationship between gene age and evolutionary rate.
Area of Science:
- Evolutionary biology
- Genomics
- Bioinformatics
Background:
- Gene age, often inferred from taxonomic distribution within gene families, is linked to evolutionary rates.
- Homology detection through sequence comparison relies on sequence similarity, influencing gene age assessments.
- Understanding the interplay between gene age and evolutionary rate is crucial for deciphering evolutionary processes.
Purpose of the Study:
- To estimate family-specific rates of protein evolution for orthologous gene families.
- To investigate the relationship between protein evolutionary rate and gene age.
- To determine the timing of gene duplication events that lead to new protein functions.
Main Methods:
- Comparative analysis of orthologous gene families across diverse species (human, fugu, fly, worm).
- Estimation of protein evolutionary rates specific to each gene family.
- Analysis of gene duplication event timings based on phylogenetic data.
Main Results:
- A positive correlation was observed: younger proteins exhibit faster evolutionary rates compared to older proteins.
- Recent gene duplication events were identified as the origin for many younger, faster-evolving proteins.
- The study provides quantitative evidence for the interrelationship between gene age and evolutionary dynamics.
Conclusions:
- Gene age is a significant factor influencing protein evolutionary rates.
- Recent gene duplications are a primary source of novel proteins with accelerated evolution.
- Findings contribute to a deeper understanding of molecular evolution and protein family diversification.
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