DNA 糖基化酶构成了生物学和生物医学上重要的一组 DNA 修复酶,负责启动碱基切除修复 (BER)。测量它们的活性可用于研究 DNA 损伤和修复机制以及在癌症诊断和药物筛选中的实际应用。以前用于检测 DNA 糖基化酶的荧光方法通常很复杂和/或范围仅限于单一酶类型。在这里,我们报告了一种通用碱基切除报告基因 (UBER) 荧光探针设计,它实现了前所未有的快速肟反应 (>150 M-1 s-1),对 DNA 的脱碱基 (AP) 位点具有高度特异性。分子转子设计在与 DNA 中的 AP 位点反应时实现了超过 250-500 倍的荧光强度增加。通过将荧光报告基因与含有特定 DNA 损伤的底物结合使用,UBER 探针原则上可与任何 DNA 糖基化酶一起用于偶联检测。我们通过实时分析五种不同的糖基化酶以及分析细胞裂解物中的糖基化酶活性来证明 UBER 探针的效用。我们预计 UBER 探针对研究 DNA
The present invention relates to methods and compositions for detecting an interaction between a protein and a ligand, comprising: (i) binding at least one fluorescent molecular rotor to said ligand or protein; and (ii) detecting a change in fluorescence emitted by said fluorescent molecular rotor after contact of the bound fluorescent molecular rotor with the other of said ligand or protein, thereby detecting an interaction between the ligand and the protein, wherein the fluorescent molecular rotor comprises: a rotating ?-bond; an electron-donating moiety; an electron-accepting moiety; and a ?-conjugated linker.
A fluorescent molecular rotor probe for tracking plasma membranes and exosomes in living cells
作者:Ling Feng、Yusheng Xie、Sung King Au-Yeung、Hagos Birhanu Hailu、Zhiyang Liu、Qingxin Chen、Jie Zhang、Qiuxiang Pang、Xi Yao、Mengsu Yang、Liang Zhang、Hongyan Sun
DOI:10.1039/d0cc03069d
日期:——
A rotor-based probe MRMP-1 was designed and synthesized. MRMP-1 can bind to plasmamembranes very quickly and stably with remarkable fluorescence enhancement. It can be used to monitor the dynamic changes in cell membranes in real-time under stimuli conditions. Importantly, MRMP-1 is the first rotor-based fluorescent sensor to label exosomes in living cells.
FLUORESCENT PROBES FOR QUANTIFICATION OF DNA DAMAGE AND REPAIR
申请人:The Board of Trustees of the Leland Stanford Junior University
公开号:US20210147932A1
公开(公告)日:2021-05-20
Probes, methods and kits for detecting and measuring abasic (AP) sites in a nucleic acid are provided. Aspects of the methods include determining glycosylase enzyme activity. Further provided herein are methods of quantifying AP sites in genomic DNA, and quantifying the amount of DNA damage. The subject probes include a fluorophore linked to an alpha nucleophile that reacts with the AP site of the nucleic acid to produce a highly fluorescent conjugate.
Ratiometric multimodal chemosensors based on cubic silsesquioxanes for monitoring solvent polarity
作者:Kazuo Tanaka、Kenichi Inafuku、Yoshiki Chujo
DOI:10.1016/j.bmc.2008.10.016
日期:2008.12
We report the multi-functionalized cubic silsesquioxane (POSS) as the ratiometric multimodal chemosensors for monitoring solvent polarity with fluorescence and F-19 NMR. The alteration of the dispersion state of the modified POSS by changing solvent polarity can be reflected into the orthogonal signal responses for the fluorescence and F-19 NMR. In addition, the ratiometric dual monitoring for the enzymatic reaction was performed using the POSS-based chemosensor. (c) 2008 Elsevier Ltd. All rights reserved.
Ultrafast Oxime Formation Enables Efficient Fluorescence Light-up Measurement of DNA Base Excision
作者:David L. Wilson、Eric T. Kool
DOI:10.1021/jacs.9b09812
日期:2019.12.11
repair enzymes responsible for initiating base excision repair (BER). Measuring their activities can be useful for studying the mechanisms DNA damage and repair and for practical applications in cancer diagnosis and drug screening. Previous fluorescence methods for assaying DNA glycosylases are often complex and/or limited in scope to a single enzyme type. Here we report a universal base excision reporter
DNA 糖基化酶构成了生物学和生物医学上重要的一组 DNA 修复酶,负责启动碱基切除修复 (BER)。测量它们的活性可用于研究 DNA 损伤和修复机制以及在癌症诊断和药物筛选中的实际应用。以前用于检测 DNA 糖基化酶的荧光方法通常很复杂和/或范围仅限于单一酶类型。在这里,我们报告了一种通用碱基切除报告基因 (UBER) 荧光探针设计,它实现了前所未有的快速肟反应 (>150 M-1 s-1),对 DNA 的脱碱基 (AP) 位点具有高度特异性。分子转子设计在与 DNA 中的 AP 位点反应时实现了超过 250-500 倍的荧光强度增加。通过将荧光报告基因与含有特定 DNA 损伤的底物结合使用,UBER 探针原则上可与任何 DNA 糖基化酶一起用于偶联检测。我们通过实时分析五种不同的糖基化酶以及分析细胞裂解物中的糖基化酶活性来证明 UBER 探针的效用。我们预计 UBER 探针对研究 DNA