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Versatile allosteric molecular devices based on reversible formation of luminous lanthanide complexes
Yusuke Kitamura1, Shikinari Yamamoto, Yuka Osawa
1Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan. ykita@kumamoto-u.ac.jp
Chemical Communications (Cambridge, England)
|November 28, 2012
Summary
A novel lanthanide-complex molecular beacon (LCMB) was developed for detecting target molecules. This molecular device exhibits reversible structural changes, leading to a responsive emission signal for sensitive detection.
Area of Science:
- Molecular devices
- Biotechnology
- Analytical chemistry
Background:
- Molecular beacons are DNA-based probes that change conformation upon target binding.
- Lanthanide complexes offer unique luminescent properties for sensing applications.
Purpose of the Study:
- To design and synthesize a versatile lanthanide-complex molecular beacon (LCMB).
- To investigate the responsive emission properties of LCMB to target molecules.
Main Methods:
- Synthesized a DNA stem-loop structure functionalized with ethylenediaminetetraacetic acid (EDTA) and 1,10-phenanthroline.
- Utilized lanthanide complexation for luminescence and tethered moieties for metal capture and signal sensitization.
Main Results:
- The developed LCMB demonstrated reversible structural changes upon interaction with target molecules.
- The emission intensity of the LCMB was observed to respond to the presence of target molecules.
Conclusions:
- The synthesized LCMB serves as a versatile molecular device for sensing applications.
- The responsive emission of LCMB, driven by structural changes, enables target molecule detection.
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