baseScribe Mod Cap1 IVT Kits for the Synthesis of Modified mRNAs

Product Information

One‑Step Synthesis of Cap1-Capped Pseudouridine‑ or N1-Methylpseudouridine‑modified mRNAs

 The baseScribe Mod Cap1 Kits enable the efficient production of Cap1‑capped, pseudouridine‑ or N1-methylpseudouridine‑modified mRNA by in vitro transcription (IVT) from DNA templates containing a T7 RNA polymerase promoter. The kits are designed for researchers who require translationally competent, immunosilent mRNA, generated in a single co‑transcriptional reaction.

Both kits are optimized for high yield and reproducibility and differ only in the uridine modification used:

• baseScribe Mod‑Pseudo Cap1 Kit: pseudouridine (Ψ)‑modified mRNA
• baseScribe Mod‑Methylpseudo Cap1 Kit: N1‑methylpseudouridine (m¹Ψ)‑modified mRNA

In both cases, all uridines in the transcript are replaced by the respective modified nucleotide.

Fig.1: The baseScribe Mod Cap1 Kits enable the production of Cap1‑capped, pseudouridine‑ or N1-methylpseudouridine‑modified mRNAs in high yields and excellent quality.

High‑Yield mRNA Production from Minimal DNA Input

The kits are optimized for IVT from either 1 µg of linearized plasmid DNA or 200–500 ng of PCR‑derived DNA templates.

Each kit provides reagents for 20 standard reactions (20 µL each).

Depending on the template sequence, a single reaction typically yields 140–180 µg of modified, Cap1‑capped mRNA, corresponding to a total output of up to 3.6 mg mRNA per kit.

Co‑Transcriptional Cap1-Capping for Efficient Translation

Cap1-capping is performed co‑transcriptionally, generating RNA with a native‑like Cap1 structure during synthesis. This eliminates the need for post‑transcriptional capping steps and simplifies the workflow while producing RNA that is ready for downstream applications.

Optimized Enzyme System for Reliable RNA Synthesis

Both kits are based on the same optimized IVT Enzyme System and include:

• T7 RNA polymerase for efficient transcription
• Pyrophosphatase to prevent reaction inhibition by pyrophosphate
• A balanced transcription buffer supporting sustained enzyme activity
• RNase inhibitor and DNase I for template removal

This combination enables robust transcription efficiency and reproducible RNA quality across different templates and production batches. A linear DNA control template is included to allow evaluation of RNA yield and integrity.

Uridine-Modifications for Immunosilent mRNA

The two kit variants differ in the modified uridine triphosphate supplied:

• Pseudouridine triphosphate (ΨTP) for the generation of Ψ‑modified mRNA
• N1‑methylpseudouridine triphosphate (m¹ΨTP) for the generation of m¹Ψ‑modified mRNA

In both kits, the modified nucleotide fully replaces uridine, resulting in uniformly modified transcripts suitable for protein expression in vitro or in vivo.

RNA Quality and Downstream Compatibility

RNA generated with the baseScribe Mod Cap1 IVT Kits shows high integrity and homogeneity and can be purified using standard RNA cleanup methods.

The resulting mRNA is compatible with downstream applications including post‑transcriptional incorporation of clickable nucleotides at the 3′ end, enabling further functionalization via click chemistry.

Key Features

• One‑step synthesis of Cap1‑capped, modified mRNA
• Choice of pseudouridine (Ψ) or N1‑methylpseudouridine (m¹Ψ)
• 140–180 µg mRNA per reaction from 1 µg DNA
• 20 reactions per kit (20 µL each)
• Optimized T7‑based IVT system with pyrophosphatase
• Control template for performance verification included

Typical Applications

• Protein expression studies
• Functional mRNA research in vitro and in vivo
• Development and evaluation of modified mRNA constructs
• RNA engineering and chemical biology workflows

For research use only.

LITERATURE

Synthetic mRNAs with superior translation and stability properties, A. Grudzien‑Nogalska et al., Methods Mol Biol. 2013;969:55-72.

Incorporation of Pseudouridine Into mRNA Yields Superior Nonimmunogenic Vector With Increased Translational Capacity and Biological Stability, K. Karikó et al., 2008, Mol. Ther., Vol. 16, p. 1833–1840.

N1-methyl-pseudouridine in mRNA enhances translation through eIF2α-dependent and independent mechanisms by increasing ribosome density, I. Svitkin et al., Nucleic Acids Research, Volume 45, Issue 10, 2 June 2017, Pages 6023–6036.