Sequence-specific Recognition of B-DNA by Oligo(N-methylpyrrolecarboxamide)s
Overview
Authors
Affiliations
Four homologous oligopeptide-EDTA molecules, tri-, tetra, penta-, and hexa(N-methylpyrrolecarboxamide)-EDTA, in the presence of Fe(II), O2, and dithiothreitol, cleave 32P-end-labeled restriction fragments from plasmid pBR322 DNA at common locations rich in A X T base pairs that differ in the size of the binding site. From analysis of the cleavage patterns visualized by high-resolution denaturing gel electrophoresis, the oligopeptides with three, four, five, and six N-methylpyrrolecarboxamide units, containing four, five, six, and seven amide NHs, bind sites of A X T-rich DNA consisting of five, six, seven, and eight contiguous base pairs, respectively. The general rule of n amides affording binding site sizes of n + 1 base pairs is consistent with the oligopeptides binding in the minor groove of right-handed DNA, with the amide NH groups forming bridges between the adjacent N-3 and O-2 atoms of adenine or thymine on opposite strands of the DNA helix.
Erben A, Sviben I, Mihaljevic B, Piantanida I, Basaric N Molecules. 2021; 26(14).
PMID: 34299591 PMC: 8306964. DOI: 10.3390/molecules26144315.
Lo A, Salam N, Hibbs D, Rutledge P, Todd M PLoS One. 2011; 6(5):e17446.
PMID: 21573061 PMC: 3090394. DOI: 10.1371/journal.pone.0017446.
Han X, Li C, Mosher M, Rider K, Zhou P, Crawford R Bioorg Med Chem. 2009; 17(4):1671-80.
PMID: 19167892 PMC: 2978248. DOI: 10.1016/j.bmc.2008.12.056.
Yellappa S, Seetharamappa J, Rogers L, Chitta R, Singhal R, DSouza F Bioconjug Chem. 2006; 17(6):1418-25.
PMID: 17105219 PMC: 2597228. DOI: 10.1021/bc060153x.
Toward rules for 1:1 polyamide:DNA recognition.
Urbach A, Dervan P Proc Natl Acad Sci U S A. 2001; 98(8):4343-8.
PMID: 11296283 PMC: 31837. DOI: 10.1073/pnas.081070798.