Intrinsically disordered regions in eukaryotic mRNA decay pathways

Area of Science:

• Molecular Biology
• Genetics
• Biochemistry

Background:

• Gene expression regulation is vital for cellular function.
• RNA-binding proteins (RBPs) are key regulators, often containing intrinsically disordered regions (IDRs).
• IDRs facilitate interactions crucial for RNA processing and gene regulation.

Purpose of the Study:

• To review the role of intrinsically disordered regions (IDRs) in eukaryotic messenger RNA (mRNA) decay.
• To elucidate how IDRs contribute to the formation of functional networks in gene expression.

Main Methods:

• Literature review focusing on IDRs in RBPs and mRNA decay pathways.
• Analysis of the structural and functional roles of IDRs in mRNA processing.
• Integration of findings to illustrate the network-building capacity of IDRs.

Main Results:

• IDRs in RBPs are enriched and mediate multivalent interactions, expanding cellular networks.
• IDRs drive the assembly of transient mRNA-protein complexes essential for mRNA degradation.
• IDRs regulate the catalytic activity of enzymes involved in mRNA decay and connect different decay pathways.

Conclusions:

• IDRs are pivotal in eukaryotic mRNA decay, influencing both individual degradation steps and global gene expression control.
• The network-building function of IDRs through multivalent interactions is critical for precise gene expression regulation.
• Understanding IDR function in mRNA decay offers insights into cellular regulatory mechanisms.