On October 5, 2004, Guliaev, Anton B.; Singer, B.; Hang, Bo published an article.SDS of cas: 55662-66-3 The title of the article was Chloroethylnitrosourea-derived ethano cytosine and adenine adducts are substrates for Escherichia coli glycosylases excising analogous etheno adducts. And the article contained the following:
Exocyclic ethano DNA adducts are saturated etheno ring derivatives formed mainly by therapeutic chloroethylnitrosoureas (CNUs), which are also mutagenic and carcinogenic. In this work, we report that two of the ethano adducts, 3,N4-ethanocytosine (EC) and 1,N6-ethanoadenine (EA), are novel substrates for the Escherichia coli mismatch-specific uracil-DNA glycosylase (Mug) and 3-methyladenine DNA glycosylase II (AlkA), resp. It has been shown previously that Mug excises 3,N4-ethenocytosine (εC) and AlkA releases 1,N6-ethenoadenine (εA). Using synthetic oligonucleotides containing a single ethano or etheno adduct, we found that both glycosylases had a ∼20-fold lower excision activity toward EC or EA than that toward their structurally analogous εC or εA adduct. Both enzymes were capable of excising the ethano base paired with any of the four natural bases, but with varying efficiencies. The Mug activity toward EC could be stimulated by E. coli endonuclease IV and, more efficiently, by exonuclease III. Mol. dynamics (MD) simulations showed similar structural features of the etheno and ethano derivatives when present in DNA duplexes. However, also as shown by MD, the stacking interaction between the EC base and Phe 30 in the Mug active site is reduced as compared to the εC base, which could account for the lower EC activity observed in this study. The experimental process involved the reaction of Imidazo[1,2-c]pyrimidin-5(6H)-one(cas: 55662-66-3).SDS of cas: 55662-66-3
The Article related to dna repair methyladenine uracil dna glycosylase ethanocytosine ethanoadenine, Enzymes: Substrates-Cofactors-Inhibitors-Activators-Coenzymes-Products and other aspects.SDS of cas: 55662-66-3
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem