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Volumn 46, Issue 37, 2007, Pages 7019-7022

Signal-amplifying resonance energy transfer: A dynamic multichromophore array for allosteric switching

Author keywords

Cooperative phenomena; FRET (fluorescence resonant energy transfer); Hydrogen bonds; Molecular devices; Signal amplification

Indexed keywords

CHROMOPHORES; ENERGY TRANSFER; HYDROGEN BONDS; MICROARRAYS;

EID: 34848859226     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/anie.200701410     Document Type: Article
Times cited : (31)

References (49)
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    • A sharp structural transition of macromolecules often involves cooperative folding. Such phase transitions can also be exploited for binary switching; for example, fluorescent side chains can be incorporated as reporter groups that are sensitive to changes in the local dielectric constants resulting from structural folding and unfolding. See
    • A sharp structural transition of macromolecules often involves cooperative folding. Such phase transitions can also be exploited for binary switching; for example, fluorescent side chains can be incorporated as "reporter groups" that are sensitive to changes in the local dielectric constants resulting from structural folding and unfolding. See: S. Uchiyama, Y. Matsumura, A. P. de Silva, K. Iwai, Anal. Chem. 2003, 75, 5926-5935.
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    • One challenge is to devise ingenious schemes to systematically modify the binding affinity of interdependent receptor sites toward the same ligand as a function of the degree of saturation that is, the average number of bound ligands per receptor molecule, 5-8] Another and presumably more demanding challenge arises from the typically weak chemical forces involved in noncovalent interactions, which require a large excess of ligand L to drive the formation of S·Ln species from a multisite receptor S with n binding sites. To complete the switching cycle depicted in Figure 1 a, this excessive amount of L needs to be quantitatively removed to regenerate free S. This is an operationally nontrivial task and has not been demonstrated before
    • n species from a multisite receptor S with n binding sites. To complete the switching cycle depicted in Figure 1 a, this excessive amount of L needs to be quantitatively removed to regenerate free S. This is an operationally nontrivial task and has not been demonstrated before.
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    • See the Supporting Information.
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    • CCDC-642093 contains the supplementary crystallographic data for the key precursor of 2 (BODIPY-appended aniline). The data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_-request/cif. See also the Supporting Information.
    • CCDC-642093 contains the supplementary crystallographic data for the key precursor of 2 (BODIPY-appended aniline). The data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_-request/cif. See also the Supporting Information.
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    • -, neither of which reacts with the receptor molecule.
    • -, neither of which reacts with the receptor molecule.
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    • 4NF, although alternative geometries can also be considered. See: a) G. A. Jeffrey, An Introduction to Hydrogen Bonding, Oxford University Press, New York, 1997;
    • 4NF, although alternative geometries can also be considered. See: a) G. A. Jeffrey, An Introduction to Hydrogen Bonding, Oxford University Press, New York, 1997;
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    • Additionally, one could also consider the orientation-dependent self quenching of BODIPY as another RET pathway leading to signal amplification. This mechanism is currently under investigation
    • Additionally, one could also consider the orientation-dependent self quenching of BODIPY as another RET pathway leading to signal amplification. This mechanism is currently under investigation.


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