2000年
Recognition of formamidopyrimidine by Escherichia coli and mammalian thymine glycol glycosylases. Distinctive paired base effects and biological and mechanistic implications
Journal of Biological Chemistry
- ,
- ,
- ,
- ,
- ,
- ,
- 巻
- 275
- 号
- 32
- 開始ページ
- 24781
- 終了ページ
- 24786
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1074/jbc.M000576200
- 出版者・発行元
- AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
The activity of prokaryotic and mammalian thymine glycol (Tg) glycosylases including Escherichia coli endonuclease III (Endo III) and endonuclease VIII (Endo VIII) and mouse Endo III homologue (mNth1) for formamidopyrimidine (Fapy) has been investigated using defined oligonucleotide substrates, 2,6-Diamino-4-hydroxy-5-N-methylformamidopyrimidine, a methylated Fapy derived from guanine, was site specifically incorporated in the oligonucleotide, The substrates containing Fapy:N pairs (N = A, G, C, T) as well as a Tg:A pair, a physiological substrate of Endo HI, Endo VIII, and mNth1, were treated by the enzymes and nicked products were quantified by gel electrophoresis. The activity of Endo III and Endo VIII for Fapy varied markedly depending on the paired base, being the highest with G (activity relative to Tg = 0.55 (Endo III) and 0.41 (Endo VIII)) and the lowest with C (0.05 (Endo III) and 0.06 (Endo VIII)). In contrast, mNth1 recognized all Fapy pairs equally well and the activity was comparable to Tg, The results obtained in the nicking assay were further substantiated by the analysis of the Schiff base intermediate using NaBH4 trapping assays. These results indicate that Escherichia coli and mammalian Tg glycosylases have a potential activity to recognize Fapy. However, as demonstrated for Fapy:C pairs, their distinctive activities implicate unequal participation in the repair of Fapy lesions in cells.
- リンク情報
-
- DOI
- https://doi.org/10.1074/jbc.M000576200
- CiNii Articles
- http://ci.nii.ac.jp/naid/30016328365
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/10827172
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000088683300075&DestApp=WOS_CPL
- URL
- http://www.scopus.com/inward/record.url?eid=2-s2.0-0034637604&partnerID=MN8TOARS
- ID情報
-
- DOI : 10.1074/jbc.M000576200
- ISSN : 0021-9258
- CiNii Articles ID : 30016328365
- ORCIDのPut Code : 80281165
- PubMed ID : 10827172
- SCOPUS ID : 0034637604
- Web of Science ID : WOS:000088683300075