The fungal snoRNAome

Area of Science:

• Molecular Biology
• Mycology
• Genomics

Background:

• Small nucleolar RNAs (snoRNAs) are crucial for ribosome biogenesis and RNA modification in eukaryotes.
• Previous studies on fungal snoRNAs were limited to a few species, leaving the broader landscape unexplored.
• A lack of automated tools hindered comprehensive analysis of fungal snoRNA repertoires.

Purpose of the Study:

• To create a comprehensive inventory of fungal snoRNAs across major fungal lineages.
• To perform functional analysis and investigate the evolutionary history of fungal snoRNAs.
• To identify innovations, deletions, and target switches within fungal snoRNA families.

Main Methods:

• Large-scale bioinformatic analysis of snoRNA sequences from over 120 families.
• Comparative genomics to trace evolutionary trajectories of snoRNAs.
• Functional annotation of snoRNAs, including previously uncharacterized ones.

Main Results:

• Cataloged over 7700 fungal snoRNA sequences, increasing known sequences by 450%.
• Clarified the landscape of fungal snoRNA families and assigned functions to orphan snoRNAs.
• Demonstrated ongoing evolutionary dynamics, including lineage-specific adaptations and functional redundancy.

Conclusions:

• The fungal snoRNAome is diverse and dynamic, undergoing continuous evolution and adaptation.
• This work provides a foundational resource for understanding fungal rRNA biogenesis and evolution.
• Identified novel snoRNA functions and evolutionary patterns, advancing the field of fungal genomics.