Azido Push−Pull Fluorogens Photoactivate to Produce Bright Fluorescent Labels
摘要:
Dark azido push-pull chromophores have the ability to be photoactivated to produce bright fluorescent labels suitable for single-molecule imaging Upon illumination, the aryl azide functionality in the fluorogens participates in a photochemical conversion to an aryl amine thus restoring charge-transfer absorption and fluorescence Previously we reported that one compound DCDHF-V-P-azide was photoactivatable Here we demonstrate that the azide-to amine photoactivation process is generally applicable to a variety of push-pull chromophores, and we characterize the photophysical parameters including photoconversion quantum yield photostability and turn-on ratio Azido push-pull fluorogens provide a new class of photoactivatable single molecule probes for flourescent labeling and super-resolution microscopy Lastly we demonstrate that photoactivated push-pull dyes can insert into bonds of nearby biomolecules, simultaneously forming a covalent bond and becoming fluorescent (fluorogenic photoaffinity labeling)
Fluorogenic compounds converted to fluorophores by photochemical or chemical means and their use in biological systems
申请人:Tweg Robert J.
公开号:US20100029952A1
公开(公告)日:2010-02-04
Fluorophores derived from photoactivatable azide-pi-acceptor fluorogens or from a thermal reaction of an azide-pi-acceptor fluorogen with an alkene or alkyne are disclosed. Fluorophores derived from a thermal reaction of an alkyne-pi-acceptor fluorogen with an azide are also disclosed. The fluorophores can readily be activated by light and can be used to label a biomolecule and imaged on a single-molecule level in living cells.
Azido Push−Pull Fluorogens Photoactivate to Produce Bright Fluorescent Labels
作者:Samuel J. Lord、Hsiao-lu D. Lee、Reichel Samuel、Ryan Weber、Na Liu、Nicholas R. Conley、Michael A. Thompson、Robert J. Twieg、W. E. Moerner
DOI:10.1021/jp907080r
日期:2010.11.18
Dark azido push-pull chromophores have the ability to be photoactivated to produce bright fluorescent labels suitable for single-molecule imaging Upon illumination, the aryl azide functionality in the fluorogens participates in a photochemical conversion to an aryl amine thus restoring charge-transfer absorption and fluorescence Previously we reported that one compound DCDHF-V-P-azide was photoactivatable Here we demonstrate that the azide-to amine photoactivation process is generally applicable to a variety of push-pull chromophores, and we characterize the photophysical parameters including photoconversion quantum yield photostability and turn-on ratio Azido push-pull fluorogens provide a new class of photoactivatable single molecule probes for flourescent labeling and super-resolution microscopy Lastly we demonstrate that photoactivated push-pull dyes can insert into bonds of nearby biomolecules, simultaneously forming a covalent bond and becoming fluorescent (fluorogenic photoaffinity labeling)