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Updated: Apr 15, 2026
Assessment of Selective mRNA Translation in Mammalian Cells by Polysome Profiling
Published on: October 28, 2014
Controlling In Vitro mRNA Polyadenylation by Monitoring Poly(A) Polymerase Consumption of ATP
Janja Skok1, Pooja Munnilal Tiwari2, Tina Vodopivec Seravalli1
1Sartorius BIA Separations d.o.o., Mirce 21, 5270 Ajdovščina, Slovenia.
Abstract:
The poly(A) tail of mRNA plays a vital role in mRNA transcript stability, translational efficiency, and immunogenicity. Co-transcriptionally polyadenylated in vitro transcribed (IVT) mRNAs typically contain poly(A) tails of 50-120 nucleotide tail length due to limitations in production of template pDNA with longer poly(A) sequences. In contrast, post-transcriptional enzymatic polyadenylation of mRNA with poly(A) polymerase (PAP) presents a modular alternative to increase the tail length. However, the lack of real-time control strategies for PAP-mediated tailing has limited its broader applicability in mRNA production. Here, we develop a methodology for controlling poly(A) tail length in post-transcriptional polyadenylation of mRNA that uses adenosine triphosphate (ATP) consumption measured at-line to predict the poly(A) tail length. We establish a novel analytical method based on monolith reverse-phase chromatography to validate the poly(A) predictions. We were able to produce longer poly(A) tails and accurately determine their length in 300-700 nt range. The resulting longer poly(A) tailed reporter mRNAs outperformed the encoded and shorter poly(A) tailed mRNAs in cell-based assays. This work presents a new strategy for controlled post-transcriptional polyadenylation using ATP consumption as a process control metric, an approach which may in future be expanded to other NTP-dependent enzymatic conversions.
Insights
Researchers developed a new method to control messenger RNA (mRNA) poly(A) tail length using adenosine triphosphate (ATP) consumption. This method enables the production of longer poly(A) tails, improving mRNA performance in cell-based assays.
Area of Science:
- Molecular Biology
- Biochemistry
- Biotechnology
Background:
- The poly(A) tail is crucial for mRNA stability, translation, and immunogenicity.
- Current in vitro transcribed (IVT) mRNA production methods yield short poly(A) tails (50-120 nt) due to template limitations.
- Post-transcriptional enzymatic polyadenylation offers a way to increase poly(A) tail length but lacks real-time control.
Purpose of the Study:
- To develop a methodology for controlling poly(A) tail length during post-transcriptional mRNA polyadenylation.
- To establish a real-time monitoring strategy for enzymatic polyadenylation processes.
- To produce and validate longer poly(A) tailed mRNAs for improved cellular function.
Main Methods:
- Developed a method using adenosine triphosphate (ATP) consumption as an at-line metric to predict poly(A) tail length.
- Employed monolith reverse-phase chromatography for accurate validation of predicted poly(A) tail lengths.
- Produced reporter mRNAs with controlled poly(A) tail lengths ranging from 300 to 700 nucleotides.
Main Results:
- Successfully controlled and accurately determined poly(A) tail lengths in the 300-700 nt range.
- Demonstrated that longer poly(A) tailed mRNAs exhibited superior performance in cell-based assays compared to shorter or uncapped/untailed controls.
- Validated the predictive power of ATP consumption for monitoring poly(A) tail elongation.
Conclusions:
- Introduced a novel strategy for controlled post-transcriptional polyadenylation of mRNA.
- Utilized ATP consumption as a process control metric for enzymatic mRNA modification.
- This approach holds potential for broader application in mRNA production and other nucleotide-dependent enzymatic processes.
