title: Dimer of 2,7-diamino-1,8-naphthyridine for the detection of mismatches formed by pyrimidine nucleotide bases.
abstract: Discrimination of base mismatches from normal Watson-Crick base pairs in duplex DNA constitutes a key approach to the detection of single nucleotide polymorphisms (SNPs). We have developed a sensor for a surface plasmon resonance (SPR) assay system to detect G-G, A-A, and C-C mismatch duplexes by employing a surface upon which mismatch-binding ligands (MBLs) are immobilized. We synthesized a new MBL consisting of 2,7-diamino-1,8-naphthyridine (damND) and immobilized it onto a CM5 sensor chip to carry out the SPR assay of DNA duplexes containing a single-base mismatch. The SPR sensor with damND revealed strong responses to all C-C mismatches, and sequence-dependent C-T and T-T mismatches. Compared to ND- and naphthyridine-azaquinolone hybrid (NA)-immobilized sensor surfaces, with affinity to mismatches composed of purine nucleotide bases, the damND-immobilized surface was useful for the detection of the mismatches composed of pyrimidine nucleotide bases.
authors.affiliation: Department of Biomolecular Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
authors.forename: Akio
authors.initials: A
authors.lastname: Kobori
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Nakatani
mesh_terms: D020137:Base Pair Mismatch; D001483:Base Sequence; D004247:DNA / Q000032:analysis / Q000737:chemistry / Q000235:genetics; D019281:Dimerization; D009287:Naphthyridines / Q000138:chemical synthesis / Q000737:chemistry*; D011742:Pyrimidine Nucleotides / Q000737:chemistry*; D020349:Surface Plasmon Resonance
chemical_list: C534173:2,7-diamino-1,8-naphthyridine; D009287:Naphthyridines; D011742:Pyrimidine Nucleotides; D004247:DNA