Molecular design of Cy3 derivative for highly sensitive in-stem molecular beacon and its application to the wash-free FISH

被引:15
作者
Kashida, Hiromu [1 ,2 ]
Osawa, Takuya [1 ]
Morimoto, Kazuhiro [1 ]
Kamiya, Yukiko [1 ,3 ]
Asanuma, Hiroyuki [1 ]
机构
[1] Nagoya Univ, Grad Sch Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan
[2] Japan Sci & Technol Agcy, PRESTO, Kawaguchi, Saitama 3320012, Japan
[3] Nagoya Univ, EcoTopia Sci Inst, Chikusa Ku, Nagoya, Aichi 4648603, Japan
关键词
DNA; Molecular beacon; Cy3; Fluorescence in situ hybridization; RATIOMETRIC BIMOLECULAR BEACONS; LIVING CELLS; BACKGROUND EMISSION; RNA DETECTION; DNA; HYBRIDIZATION; PROBES; FLUORESCENCE; EXPRESSION;
D O I
10.1016/j.bmc.2015.02.030
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
We herein describe a novel in-stem molecular beacon (ISMB) containing multiple Cy3-quencher pairs on D-threoninol scaffolds in the stem region. The designed Cy3 derivative was not significantly quenched by the adjacent nucleobases, self-quenching of the fluorophore was minimal, and the fluorophore did not severely destabilize the duplex. Using newly designed Cy3, we synthesized ISMBs containing two Cy3 moieties. The signal to background ratio of the ISMB containing two Cy3 moieties was above 100, whereas that with one Cy3 was 30. A Cy3-derivative containing ISMB used in a fluorescence in situ hybridization (FISH) detected endogenous beta-actin mRNA in fixed cells without need for washing procedures. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1758 / 1762
页数:5
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