The abstract is read at the publisher; the summary is JClub's.
Proline substitutions in the thumb loop of T7 RNA polymerase improve integrity of long transcripts, with M362K as the top performer on 12 kb templates.
- Why it matters: Incomplete long RNA products hinder therapeutic mRNA manufacturing, especially for saRNA, and limited mechanistic insight blocks targeted quality improvements.
- What they did: Using templates from a common 12 kb RNA sequence, transcript integrity was measured as length increased, then thumb-loop variants were tested across 4, 8, and 12 kb.
- The result: Several thumb-loop variants outperformed K389A on the 12 kb template; M362K also preserved integrity gains with N1-methylpseudouridine or 5-methylcytidine incorporated during transcription.
The findingWhy it mattersWhat they didThe result
AI summary of the abstract · may contain errors · not medical advice · read the paper.