Team uses AlphaFold AI to redesign gene-editing proteins to make them safer
Summary
Researchers used the AI tool AlphaFold to study and change gene-editing proteins, making them safer by reducing unintended edits to DNA. They focused on the Cas9 protein in the CRISPR system, which can sometimes attach to the wrong DNA sequences by mistake.Key Facts
- Gene-editing therapies can sometimes edit the wrong DNA sequences, called off-target effects.
- CRISPR gene editing uses guide RNA, Cas9 protein, and another protein that changes DNA.
- Cas9 can still bind to DNA even if there are small mismatches, causing off-target edits.
- Scientists used AlphaFold, an AI that predicts protein structures, to find parts of Cas9 causing off-target effects.
- They modified these parts in Cas9 to reduce mistaken DNA edits.
- Researchers built a big library of off-target sites using a version of CRISPR that changes DNA bases for study.
- Their work helps make gene editing safer for medical use.
- The research was published in the journal Nature by a team in China.
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