Modulation of poly(A)-specific ribonuclease (PARN): current knowledge and perspectives.

Area of Science:

• Molecular Biology
• Biochemistry
• Genetics

Background:

• Deadenylation, the shortening of poly(A) tails, is crucial for mRNA decay and translational control.
• Poly(A)-specific ribonuclease (PARN) is a key mammalian deadenylase, uniquely binding both 5' cap and 3' poly(A) tail.
• PARN plays vital roles in development, DNA damage response, cell cycle, and non-coding RNA maturation.

Purpose of the Study:

• To review the multifaceted roles of PARN in RNA metabolism and gene expression.
• To explore regulatory mechanisms controlling PARN activity.
• To discuss the clinical implications of targeting PARN.

Main Methods:

• Literature review of studies on PARN function and regulation.
• Analysis of PARN's involvement in various cellular processes and diseases.
• Examination of regulatory factors including RBPs and nucleoside analogues.

Main Results:

• PARN is implicated in mRNA degradation, nonsense-mediated decay, and cytoplasmic polyadenylation.
• PARN's activity is regulated by phosphorylation, RNA-binding proteins, and nucleoside analogues.
• Altered PARN expression is linked to cancer, highlighting its role in oncogenesis.

Conclusions:

• PARN is a central regulator of mRNA turnover with implications beyond RNA metabolism.
• Understanding PARN regulation is key to unraveling complex gene expression control.
• Targeting PARN presents promising therapeutic avenues for various diseases, particularly cancer.