We describe the reaction of formamide with 2'-deoxyadenosine and 2'-deoxyguanosine to give imidazole ring opening by nucleophilic addition on the electrophilic C(8)-position of the purine ring. This information allows improvement of the one-lane chemical DNA sequencing procedure based on the base-selective reaction of formamide with DNA. The reactivity with formamide of several 7-deazapurine analogues (7-deaza-2'-deoxyinosine, 7-deaza-2'-deoxyguanosine, and 7-deaza-2'-deoxyadenosine) incorporated into polynucleotides is also described. The wide spectrum of different sensitivities to formamide displayed by these purine analogues provides the single-lane DNA chemical sequencing procedures with the possibility of wide-ranging signal intensity modulation and thus increased specificity.
Saladino, R., Mincione, E., Crestini, C., Negri, R., Dimauro, E., Costanzo, G. (1996). Mechanism of degradation of purine nucleosides by formamide. Implications for chemical DNA sequencing procedures. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 118(24), 5615-5619 [10.1021/ja953527y].
Mechanism of degradation of purine nucleosides by formamide. Implications for chemical DNA sequencing procedures
CRESTINI, CLAUDIA;
1996-01-01
Abstract
We describe the reaction of formamide with 2'-deoxyadenosine and 2'-deoxyguanosine to give imidazole ring opening by nucleophilic addition on the electrophilic C(8)-position of the purine ring. This information allows improvement of the one-lane chemical DNA sequencing procedure based on the base-selective reaction of formamide with DNA. The reactivity with formamide of several 7-deazapurine analogues (7-deaza-2'-deoxyinosine, 7-deaza-2'-deoxyguanosine, and 7-deaza-2'-deoxyadenosine) incorporated into polynucleotides is also described. The wide spectrum of different sensitivities to formamide displayed by these purine analogues provides the single-lane DNA chemical sequencing procedures with the possibility of wide-ranging signal intensity modulation and thus increased specificity.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
