Example sentences for: abasic

How can you use “abasic” in a sentence? Here are some example sentences to help you improve your vocabulary:

  • A contact plot of huAPE1 with the DNA in the 1DE8 crystal structure (Figure 5) shows that motifs 1-3,5-8, and 10-12 all have residues close to the substrate, an oligonucleotide containing an abasic site (AP-DNA).

  • APEs are essential for mammalian cell growth and bacterial survival in the presence of ionizing radiation and DNA mutagens [ 6 ] . They initiate repair of an abasic DNA site by cleaving the phosphodiester backbone 5' of the phosphodeoxyribose.

  • An alanine substitution mutant, N226A, of a conserved residue at the end of molego 7a that forms a hydrogen bond with the second phosphate group downstream of the abasic site, had enhanced APE activity but increased Km and Kd values, similar to an alanine mutant of R177, which binds to the same site, reported previously [ 34 ] . A combination of the two mutants, N226A and R177A, substantially reduced the ability of APE1 to bind to DNA containing an abasic site (Izumi et al.

  • This generates the necessary 3' hydroxyl group for DNA polymerases (pol β, δ or ε, in eukaryotes) to insert the correct nucleotide in later steps in the base excision repair pathway (BER-pathway) [ 7 8 ] . Recent crystal structures of huAPE1 complexed with DNA containing an abasic site [ 9 10 11 ] , combined with sequence analysis and site-directed mutagenesis, have defined the residues that participate in metal ion based cleavage of the phosphate backbone of the DNA [ 12 13 14 15 16 17 ] .

  • This redundancy of binding to the 3' side is unique to APE, as is its strong binding to the DNA opposite the abasic site.

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