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Molecular beacon strategies for sensing purpose

(2021) Molecular beacon strategies for sensing purpose. TrAC - Trends in Analytical Chemistry. ISSN 01659936

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The improvement of nucleic acid probes as vital molecular engineering devices will cause a noteworthy contribution to developments in bioimaging, biosensing, and disorders diagnosis. The molecular beacon (MB) which was designed by Tyagi and Kramer in 1996, are loop-stem hairpin-designed oligonucleotides armed with a quencher and a dye (also named reporter groups) at the 3� or 5� ends. This construction allows that MBs in the absence of their target complementary molecules do not fluoresce. Through hybridization with their specific targets a spontaneous configuration change on MBs occur and the dye and quencher separate from each other, resulting in emitting the fluorescence. MBs are effective probes for biosensing because of their extraordinary target-specificity, unique structure, inherent fluorescent signal transduction mechanism, low background fluorescence emission, recognition without separation, and favorable thermodynamic properties. In comparison to other probes (such as linear DNA sequences), MBs with the same number of complementary nucleotides matching their target, are multitasking probes. They have advantages of thermodynamic and photostability, flexible ability for conjugation, higher efficient intrinsic signal switching, and ultra-sensitivity. MBs not only are useful for identifying a nucleic acid target but can also be employed for recognition of various non-nucleic acid goals, including heavy metals and cations, enzymes, cells, ATP, etc. Hence, this review highlights the potential of MBs in the improvement of biosensors and their usage in detection of different analytes such as miRNA, mRNA, cocaine, methamphetamine, actin, thrombin, heavy metal and cations and so on. © 2020 Elsevier B.V.

Item Type: Article
Keywords: DNA sequences; Enzymes; Fluorescence; Heavy metals; Oligonucleotides; Positive ions; RNA; Signal transduction, Complementary nucleotides; Fluorescence emission; Fluorescent signals; Intrinsic signal; Low background; Molecular beacon; Molecular engineering; Photo-stability, Probes
Divisions: Education Vice-Chancellor Department > Faculty of Pharmacy > Department of Pharmacotherapy
Journal or Publication Title: TrAC - Trends in Analytical Chemistry
Abstract and Indexing: ISI, Pubmed
Quartile : Q1
Volume: 134
Publisher: Elsevier B.V.
Identification Number:
ISSN: 01659936
Depositing User: خانم فائزه مظفری

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