Structural Basis for the Recognition and removal of damaged bases from DNA by a DNA Repair Enzyme, 3-Methyladenine DNA glycosylase from Escherichia coli.

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  • 大腸菌由来DNA修復酵素3‐メチルアデニンDNAグリコシラーゼの構造と機能
  • ダイチョウキン ユライ DNA シュウフク コウソ 3 メチルアデニン DNA

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Abstract

Escherichia coli 3-methyladenine DNA glycosylase II is a DNA repair enzyme that removes numerous alkylated bases from DNA. The three-dimensional structure, mutagenesis and model building studies suggest that the active site is located in a cleft between the two helical domains and that the enzyme flips the target base out of the DNA duplex into the active-site cleft. The structural similarity among a variety of DNA glycosylases shows the existence of a DNA glycosylase family, whose members recognize diverse sets of substrates.

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