Transcription factors interact with RNA to regulate genes

Area of Science:

• Molecular Biology
• Genetics
• Cell Biology

Background:

• Transcription factors (TFs) are key regulators of gene expression, defining cell identity.
• Canonical TFs possess DNA-binding and protein-interaction domains.
• The full repertoire of TF interaction capabilities is not yet understood.

Purpose of the Study:

• To investigate the potential for transcription factors to bind RNA.
• To characterize the functional significance of TF-RNA interactions in gene regulation.
• To explore the implications of TF-RNA binding in development and disease.

Main Methods:

• Bioinformatic analysis to identify potential RNA-binding domains in TFs.
• Biochemical assays to confirm TF-RNA binding.
• Chromatin immunoprecipitation and other molecular biology techniques to study TF-RNA-DNA interactions in vivo.

Main Results:

• At least half of studied transcription factors possess a previously unrecognized RNA-binding domain.
• This domain shares features with the Tat protein's RNA-binding motif.
• TF-RNA binding enhances the dynamic assembly of DNA, RNA, and TFs on chromatin.
• TF-RNA interactions are evolutionarily conserved and implicated in vertebrate development and disease.

Conclusions:

• Transcription factors can bind DNA, RNA, and proteins, a fundamental property for gene regulation.
• RNA binding is a significant, conserved function of many TFs, influencing chromatin dynamics.
• Dysregulation of TF-RNA interactions contributes to various diseases.