3CWT

Crystal Structure of an AlkA Host/Guest Complex 2'-fluoro-2'-deoxyinosine:Adenine Base Pair

3CWT の概要

• エントリーDOI: 10.2210/pdb3cwt/pdb
• 関連するPDBエントリー: 3CVS 3CVT 3CW7 3CWA 3CWS 3CWU
• 分子名称: DNA-3-methyladenine glycosylase 2, DNA (5'-D(*DGP*DAP*DCP*DAP*DTP*DGP*DAP*(2FI)P*DTP*DGP*DCP*DC)-3'), DNA (5'-D(*DGP*DGP*DCP*DAP*DAP*DTP*DCP*DAP*DTP*DGP*DTP*DC)-3'), ... (4 entities in total)
• 機能のキーワード: alka, 2'-fluoro-2'-deoxyinosine, dna repair, host-guest complex, dna structure, dna damage, hydrolase, hydrolase-dna complex, hydrolase/dna
• 由来する生物種: Escherichia coli
• タンパク質・核酸の鎖数: 8
• 化学式量合計: 140406.54

構造登録者

Bowman, B.R.,Lee, S.,Wang, S.,Verdine, G.L. (登録日: 2008-04-22, 公開日: 2008-09-02, 最終更新日: 2024-02-21)

主引用文献

Bowman, B.R.,Lee, S.,Wang, S.,Verdine, G.L.
Structure of the E. coli DNA Glycosylase AlkA Bound to the Ends of Duplex DNA: A System for the Structure Determination of Lesion-Containing DNA.
Structure, 16:1166-1174, 2008

PubMed Abstract: The constant attack on DNA by endogenous and exogenous agents gives rise to nucleobase modifications that cause mutations, which can lead to cancer. Visualizing the effects of these lesions on the structure of duplex DNA is key to understanding their biologic consequences. The most definitive method of obtaining such structures, X-ray crystallography, is troublesome to employ owing to the difficulty of obtaining diffraction-quality crystals of DNA. Here, we present a crystallization system that uses a protein, the DNA glycosylase AlkA, as a scaffold to mediate the crystallization of lesion-containing duplex DNA. We demonstrate the use of this system to facilitate the rapid structure determination of DNA containing the lesion 8-oxoguanine in several different sequence contexts, and also deoxyinosine and 1,N(6)-ethenoadenine, each stabilized as the corresponding 2'-flouro analog. The structures of 8-oxoguanine provide a correct atomic-level view of this important endogenous lesion in DNA.

PubMed: 18682218
DOI: 10.1016/j.str.2008.04.012

実験手法

X-RAY DIFFRACTION (2.3 Å)