DNA repaired by HAP1 enzyme

DNA repaired by HAP1 enzyme

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This image is part of the feature Dna Repair

Credit: JAMES KING-HOLMES/SCIENCE PHOTO LIBRARY

Caption: DNA repair enzyme. Computer simulation of a HAP1 (lower frame, called APE/Ref-1) enzyme repairing a damaged Deoxyribonucleic Acid (DNA, stick model) molecule. HAP1's surface has been colour-coded: red areas are positively charged & blue areas are negative. HAP1's positively-charged active site is at lower centre. DNA carries a cell's genetic code. The DNA in each cell is damaged 2000-10,000 times a day by hydrolysis reactions which convert N-glycosyl bonds to apurinic/apyrimidinic breaks. DNA damage can cause cell death or cancer. HAP1 is the first protein to recognise the damage & starts repairs by breaking DNA's molecular backbone so other proteins can replace the faulty section.

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Keywords: artwork, cancer prevention, chemical, chemistry, compound, compounds, computer simulation, damaged, dna, dna repair, enzyme, enzymes, hap1, hap1 enzyme, molecular graphic, molecule, molecules, protein, proteomics, repair

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