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Researchers Capture the First Atomic-Level Images of a Critical Human DNA Repair Enzyme
SciTechDaily • • health
Key Points:
- Researchers have captured the first atomic-level images of the human enzyme SMUG1, which plays a crucial role in repairing damaged DNA by removing uracil and related bases that can cause genetic instability.
- The study revealed SMUG1’s three-dimensional structure in multiple forms, including bound to uracil, 5-fluorouracil (a chemotherapy drug), and double-stranded DNA, providing new insights into its DNA repair mechanism.
- This work produced the first combined neutron and X-ray structure of a DNA-binding protein, offering detailed information on proton positions and hydrogen-bonding networks in the enzyme’s active site.
- The findings have implications for cancer biology and may guide future drug development targeting SMUG1, particularly since the enzyme helps remove chemotherapy-related DNA damage.
- The research involved multiple institutions and highlights the significance of Sweden’s European Spallation Source (ESS) neutron facility, which will enhance future structural studies of this kind.
