title: Structure-function relationships of three kinds of immobilized DNA probes in the discrimination abilities of single nucleotide variation.
abstract: We have compared here the nucleic acid hybridization abilities of three kinds of immobilized probes with different structures. Under the conventional structural design, we found that the share-stem hairpin structure probe (SHP) was more easily hybridized with the target than the linear probe and conventional hairpin shaped probe (HP). The HP probe had the lowest hybridization ability. However, it was shown a contrary result in the single-nucleotide mismatch discrimination ratio. Subsequently, we increased the Tm of the two hairpin-shaped probes and found both of the two probes were improved on the hybridization specificities even though the hybridization abilities were decreased. The result of the hybridization temperature optimization experiment showed that at 45 degrees C, the Dr Ratio (mismatch discrimination ratio) of HP-28T and SHP-32T were both as high as 8.5 while the ratios of linear probe were -0.3-0.7. The results suggested that the immobilized shared stem hairpin shaped probes also had the ability to discriminate single-nucleotide variation under proper design.
authors: State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China.
authors: Yunfei
authors: Y
authors: Bai
authors: Qin
authors: Q
authors: Han
authors: Dai
authors: D
authors: Lin
authors: Junfeng
authors: J
authors: Luo
authors: Jin
authors: J
authors: Tu
authors: Qinyu
authors: Q
authors: Ge
authors: Zuhong
authors: Z
authors: Lu
mesh_terms: D001483:Base Sequence; D015342:DNA Probes; D020411:Oligonucleotide Array Sequence Analysis; D020641:Polymorphism, Single Nucleotide; D013329:Structure-Activity Relationship
chemical_list: D015342:DNA Probes