title: U-pin polyamide motif for recognition of the DNA minor groove.
abstract: DNA-binding hairpin pyrrole-imidazole polyamides with gamma-aminobutyric acid as a turn-forming residue tolerate A.T or T.A base pairs under the turn. U-pins-polyamides with a different turn-have been synthesized and their DNA binding properties were studied. The two turn-forming residues are connected via the ring nitrogens using variable length aliphatic linkers ((CH(2))(n), n=3-6). Through optimization of the linker length and the substituents at the 2-position of the pyrrole residue on the U-turn, polyamides with G.C/C.G tolerant turns could be found, which bind to DNA in a predictable manner.
authors.affiliation: California Institute of Technology, Division of Chemistry and Chemical Engineering, The Beckman Institute, Pasadena, CA 91125, USA.
authors.forename: Alexander
authors.initials: A
authors.lastname: Heckel
authors.forename: Peter B
authors.initials: PB
authors.lastname: Dervan
mesh_terms: D001483:Base Sequence; D001665:Binding Sites / Q000235:genetics; D004247:DNA / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D008969:Molecular Sequence Data; D009690:Nucleic Acid Conformation; D009757:Nylons / Q000737:chemistry* / Q000378:metabolism*; D010957:Plasmids / Q000737:chemistry / Q000235:genetics / Q000378:metabolism
chemical_list: D009757:Nylons; D004247:DNA