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Updated: Mar 3, 2026
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Studying Protein Function and the Role of Altered Protein Expression by Antibody Interference and Three-dimensional Reconstructions
Published on: April 21, 2016
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Intrinsic protein disorder reduces small-scale gene duplicability
Sanghita Banerjee1,2, Felix Feyertag1, David Alvarez-Ponce1
1Department of Biology, University of Nevada, Reno, NV 89557, USA.
Summary
Gene duplication retention is complex. Intrinsically disordered proteins (IDPs) generally hinder gene retention, except during whole-genome duplication (WGD), where disordered regions (IDRs) aid duplicate survival and genome evolution.
Area of Science:
- Evolutionary biology
- Genomics
- Biochemistry
Background:
- Gene duplication is a key driver of genome evolution, but not all duplicates are retained.
- Intrinsically disordered proteins (IDPs) possess flexible regions (IDRs) that influence protein interactions and modifications.
- The role of protein intrinsic disorder in gene duplication retention remains largely unknown.
Purpose of the Study:
- To investigate the impact of protein intrinsic disorder on gene duplicability across diverse species.
- To determine whether intrinsically disordered regions (IDRs) promote or impede gene duplicate retention.
- To explore the differential effects of small-scale duplications versus whole-genome duplications (WGDs) on IDP-encoding genes.
Main Methods:
- Comparative proteomic analysis across human, Drosophila melanogaster, Caenorhabditis elegans, Saccharomyces cerevisiae, Arabidopsis thaliana, and Escherichia coli.
- Quantification and analysis of intrinsically disordered regions (IDRs) in proteins encoded by singletons, small-scale duplicates, and ohnologs (WGD-derived duplicates).
- Statistical assessment of the correlation between protein disorder levels and gene duplication events.
Main Results:
- Proteins encoded by duplicated genes are generally less disordered than those encoded by singletons.
- A notable exception exists for ohnologs, where encoded proteins exhibit higher disorder than singletons or small-scale duplicates.
- Duplication of IDP-encoding genes is often detrimental, unless it occurs within the context of whole-genome duplication (WGD).
Conclusions:
- Intrinsic disorder generally disfavors gene duplicate retention, likely due to increased risks of deleterious non-specific interactions.
- IDRs facilitate the retention of gene duplicates specifically during whole-genome duplication (WGD) events.
- These findings highlight context-dependent roles of protein disorder in shaping genome evolution through gene duplication.
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