Enzymatic Incorporation and Fluorescent Labelling of Cyclooctyne-Modified Deoxyuridine Triphosphates in DNA

X. Ren, M. Gerowska, A. H. El-Sagheer and T. Brown. Bioorg. Med. Chem. 2014.


The amino group of 5-aminopropargyl-2’-deoxyuridine-5’-triphosphate was labelled with dibenzocyclooctyne (DIBO) and two derivatives of bicyclo [6.1.0] non-4-yne (BCN) with short and long linkers to produce three different cycloalkyne-modified deoxyuridine triphosphates. BCN was successfully incorporated into DNA at multiple sites by enzyme-mediated primer extension and the polymerase chain reaction (PCR). Efficient fluorescent labelling of the BCN-DNA and DIBO-DNA with Cy3-azide was demonstrated.