What Signatures Dominantly Associate with Gene Age?

Area of Science:

• Evolutionary biology
• Genomics
• Bioinformatics

Background:

• Genes originate at different evolutionary times, acquiring distinct genomic signatures.
• Previous research has explored various gene age-related signatures, but dominant associations remain unclear.

Discussion:

• This study comprehensively assigns gene ages and analyzes 10 potential genomic signatures.
• Multivariate analyses reveal GC content and protein-protein interaction network (PPIN) connectivity as dominant age-related signatures.
• Investigated heterogeneity of these signatures in gene duplicates versus singletons.

Key Insights:

• GC content is a consistent primary factor for gene age in both singletons and duplicates.
• PPIN connectivity is more strongly linked to gene age in singletons than in duplicates.
• GC content and PPIN connectivity exhibit differential interplays with natural selection and mutation.

Outlook:

• Further research can explore the functional implications of these age-related genomic signatures.
• Understanding these signatures can refine evolutionary models and gene function predictions.
• This work provides a foundation for investigating the evolutionary dynamics of the genome.