Transcription factor modularity in a gene-centered C. elegans core neuronal protein-DNA interaction network.

Area of Science:

• Molecular Biology
• Systems Biology
• Neuroscience

Background:

• Transcription regulatory networks govern metazoan development, function, and disease.
• These networks consist of protein-DNA interactions between transcription factors (TFs) and target genes.
• Understanding the relationship between network architecture and functionality is crucial.

Purpose of the Study:

• To investigate the architecture of the Caenorhabditis elegans core neuronal protein-DNA interaction network.
• To determine how network organization relates to its functional roles.
• To explore the evolutionary conservation of specific TF families in neuronal function.

Main Methods:

• Analysis of the Caenorhabditis elegans core neuronal protein-DNA interaction network.
• Identification and characterization of transcription factor (TF) modules.
• Comparative analysis of TF expression patterns in C. elegans and mouse neurons.

Main Results:

• The network is organized into two distinct TF modules.
• One module includes TFs involved in reproduction with broader tissue expression.
• The second module is enriched for paired homeodomain TFs, primarily targeting neuronal genes, and this neuronal role is conserved in mice.

Conclusions:

• The Caenorhabditis elegans neuronal network architecture features TF modules linked to distinct functional aspects.
• Paired homeodomain TFs play a conserved role in neuronal function across species.
• Modular organization contributes to the functional specificity of the neuronal network.