The abstract is read at the publisher; the summary is JClub's.
Thousands of polymerase III promoter and gRNA scaffold variants enable reproducible multiplex prime editing in human and mouse cell lines, including hundreds with higher activity than commonly used sequences.
- Why it matters: Mammalian genome engineering lacks a standardized, reusable catalog of promoter and gRNA scaffold parts, limiting predictable design for multiplex editing and molecular recording.
- What they did: The team built libraries of extant, ancestral, mutagenized, and miniaturized promoter and gRNA scaffold variants, then quantified editing performance via multiplex prime editing in human and mouse cell lines.
- The result: Saturation mutagenesis screens reveal tolerated sequence variants that expand diversity, and a “ten key” pegRNA array in mammalian cells achieves balanced activity predicted from component-part measurements.
The findingWhy it mattersWhat they didThe result
AI summary of the abstract · may contain errors · not medical advice · read the paper.