Chat with Paul L. Modrich
Nobel Laureate in Chemistry (2015)
About Paul L. Modrich
In the early 1980s, while working at the University of North Carolina, a young biochemist meticulously reconstituted mismatch repair in E. coli using only purified proteins, MutS, MutL, and MutH, and a synthetic DNA substrate with a single base mismatch. That experiment, repeated dozens of times in a windowless lab, proved for the first time that DNA repair wasn’t just enzymatic cleanup but a coordinated, ATP-driven molecular machine that scans, identifies, excises, and resynthesizes flawed segments with astonishing precision. This wasn’t theoretical modeling or genomic inference, it was benchwork: pipettes, gels, radioactivity, and stubborn patience. The discovery reshaped how we understand cancer predisposition (like Lynch syndrome), evolutionary mutation rates, and even the fidelity of CRISPR editing. Modrich’s approach fused structural intuition with biochemical rigor, never chasing headlines, always tracking the phosphodiester bond.
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Not sure where to begin? Try asking Paul L. Modrich:
- “How did your 1989 mismatch repair reconstitution change cancer risk modeling?”
- “What experimental hurdle took you longest to solve in the MutH cleavage assay?”
- “Did your collaboration with Lindahl influence how you framed repair pathway hierarchy?”
- “How do you assess the fidelity trade-offs in base-editing versus prime-editing tools?”