Sensing of DNA conformation based on change in FRET efficiency between laser dyes

SENSORS AND ACTUATORS B-CHEMICAL

卷:204

Article

Dey, Dibyendu¹  Saha, Jaba¹  Roy, Arpan Datta¹  Bhattacharjee, D.¹  Sinha, Sangram²  Paul, P. K.³  Chakraborty, Santanu¹  Hussain, Syed Arshad¹ 

[1] Tripura Univ, Dept Phys, Thin Film & Nanosci Lab, Suryamaninagar 799022, Tripura, India

[2] Tripura Univ, Dept Bot, Suryamaninagar 799022, Tripura, India

[3] Jadavpur Univ, Dept Phys, Kolkata 700032, India

关键词: Fluorescence Resonance Energy Transfer (FRET);    DNA;    Denaturation;    Coil formation;    Layer-by-Layer (LbL);   

DOI  :  10.1016/j.snb.2014.08.029

来源: Elsevier

【 摘 要 】

This communication reports the effect of DNA conformation on fluorescence resonance energy transfer (FRET) efficiency between two laser dyes in layer by layer (LbL) self assembled film. The dyes Acraflavine and Rhodamine B were attached onto the negative phosphate backbones of DNA in LbL film through electrostatic attraction. Then FRET between these dyes was investigated. Increase in pH or temperature causes the denaturation of DNA followed by coil formation of single stranded DNA. As a result the FRET efficiency also changed along with it. These observations demonstrated that by observing the change in FRET efficiency between two laser dyes in presence of DNA it is possible to detect the altered DNA conformation in the changed environment. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

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