Unlocking the Secrets of RNA Production: A Game-Changing Enzyme
Imagine if there was a single enzyme capable of producing all four nucleotide triphosphates—the essential building blocks of ribonucleic acid (RNA)—with remarkable efficiency. Well, researchers at the Institute of Science Tokyo have made this breakthrough! They discovered an enzyme that utilizes polyphosphate as a phosphate donor, transforming low-cost nucleotide precursors into the active components necessary for RNA synthesis. This innovative method not only simplifies the process of nucleotide production but also presents an economical and efficient solution for in vitro RNA synthesis.
A Revolutionary Approach to mRNA Building Block Production
Every living organism relies on specific biomolecules that are fundamental to life. Among these, nucleic acids like messenger ribonucleic acid (mRNA) play a crucial role by carrying and transferring genetic information within cells. The synthesis of mRNA depends on nucleoside triphosphates (NTPs), which serve as building blocks or fuel for various biochemical reactions. However, producing NTPs efficiently has been a significant challenge due to current methods involving multiple enzymes and hefty energy expenses.
To tackle these issues, a dedicated team from the Institute of Science Tokyo, Japan—led by graduate student Ryusei Matsumoto from the School of Life Science and Technology, along with former postdoctoral researcher Takayoshi Watanabe, Associate Professor Liam M. Longo, and Professor Tomoaki Matsuura from the Earth-Life Science Institute—unveiled a straightforward and cost-effective solution. Their pivotal discovery centered on a novel enzyme that proficiently converts widely used nucleotide substrates, including both nucleoside monophosphates and diphosphates, into NTPs. This groundbreaking study was published online in Nature Communications on January 8, 2026.
"Our focus was on a specific enzyme known as polyphosphate (PolyP) kinase 2, named MAN, which originates from the marine bacterium Mangrovibacterium marinum," explains Matsuura. "What’s intriguing is that this enzyme can efficiently convert all standard RNA nucleotides."
Rather than depending on expensive modern phosphate donors, the enzyme employs polyphosphate, a cost-effective and readily available resource. This adjustment greatly reduces NTP production costs. Additionally, the enzyme demonstrates broad substrate specificity, a characteristic typical of ancient enzymes.
"Such wide-ranging activity is uncommon in contemporary enzymes, suggesting how early biological systems may have thrived with just a limited number of enzymes," remarks Longo.
Capitalizing on the versatile activity of MAN, the researchers devised a straightforward one-step reaction for the synthesis of mRNA in a single pot. In this streamlined approach, the nucleotide precursors are first transformed into NTPs and then instantly converted into mRNA. This technique eliminates the necessity for intricate, multi-step processes, thereby simplifying RNA production. Besides its affordability and simplicity, this method promotes sustainable chemistry. Polyphosphates, in comparison to traditional energy donors, are stable, non-toxic, and easily produced, making the entire process environmentally friendly.
Looking ahead, this research holds immense potential across diverse areas of biotechnology and medicine where economical NTP production is essential. For instance, it could enhance the manufacturing of RNA vaccines or RNA-based diagnostic tools, and foster the development of synthetic biological systems. Ultimately, this study underscores how principles from ancient biology can be harnessed to tackle modern challenges, offering a simple enzymatic solution to overcome significant hurdles in RNA-related technologies.
