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Prokaryotic and Highly-Repetitive WD40 Proteins: A Systematic Study
Xue-Jia Hu1, Tuan Li1, Yang Wang1
1Lab of Computational Chemistry and Drug Design, Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, 518055, P.R. China.
This study catalogs prokaryotic WD40 proteins, revealing their roles in signal transduction and nutrient synthesis. These proteins, often containing multiple domains, likely evolved through recent duplication events, suggesting enhanced stability in younger forms.
Area of Science:
- Proteomics
- Evolutionary Biology
- Structural Biology
Background:
- WD40 repeat proteins are ancient and crucial for eukaryotic cellular processes.
- Prokaryotic WD40 proteins are largely uncharacterized compared to their eukaryotic counterparts.
Purpose of the Study:
- To systematically analyze prokaryotic WD40 proteins.
- To compare prokaryotic WD40 proteins with eukaryotic ones.
- To investigate the evolutionary origins and structural characteristics of prokaryotic WD40 proteins.
Main Methods:
- Bioinformatic identification and cataloging of prokaryotic WD40 proteins.
- Comparative analysis of prokaryotic and eukaryotic WD40 protein structures and sequences.
- Analysis of domain composition, hydrogen bond networks, and sequence identity.
Main Results:
- Approximately 4,000 prokaryotic WD40 proteins were identified, constituting 6.5% of all WD40 proteins.
- These proteins are enriched in Cyanobacteria and Planctomycetes, involved in signal transduction and nutrient synthesis.
- Prokaryotic WD40 proteins frequently feature multiple domains and extensive hydrogen bonding networks, with ~20% arising from recent duplication events.
Conclusions:
- This work provides a comprehensive catalog of prokaryotic WD40 proteins.
- Prokaryotic WD40 proteins exhibit distinct structural features and evolutionary patterns compared to eukaryotes.
- Younger WD40 proteins, particularly Highly-Repetitive WD40s, are predicted to possess higher stability.
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