One-strand oligonucleotide probe for fluorescent label-free “turn-on” detection of T4 polynucleotide kinase activity and its inhibition

The Analyst ◽  
2015 ◽  
Vol 140 (16) ◽  
pp. 5650-5655 ◽  
Author(s):  
Fu Zhou ◽  
Guangfeng Wang ◽  
Dongmin Shi ◽  
Yue Sun ◽  
Liang Sha ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Kinase Activity ◽  
Oligonucleotide Probe ◽  
Thioflavin T ◽  
Fluorescent Label ◽  
Label Free ◽  
Molecular Rotor ◽  
Turn On ◽  
Polynucleotide Kinase ◽  
G Quadruplex

Thioflavin T (ThT), as one of the most exciting fluorogenic molecules, boasts the “molecular-rotor” ability to induce DNA sequences containing guanine repeats to fold into G-quadruplex structures.

Label-free luminescence switch-on detection of T4 polynucleotide kinase activity using a G-quadruplex-selective probe

2014 ◽  
Vol 50 (40) ◽  
pp. 5313-5315 ◽  
Author(s):  
Hong-Zhang He ◽  
Ka-Ho Leung ◽  
Wei Wang ◽  
Daniel Shiu-Hin Chan ◽  
Chung-Hang Leung ◽  
...  
Keyword(s):  
Kinase Activity ◽  
Label Free ◽  
Polynucleotide Kinase ◽  
G Quadruplex ◽  
T4 Polynucleotide Kinase

Label free fluorescence turn-on detection of polynucleotide kinase activity with a perylene probe

2012 ◽  
Vol 48 (63) ◽  
pp. 7862 ◽  
Author(s):  
Huping Jiao ◽  
Bin Wang ◽  
Jian Chen ◽  
Dongli Liao ◽  
Wenying Li ◽  
...  
Keyword(s):  
Kinase Activity ◽  
Label Free ◽  
Turn On ◽  
Polynucleotide Kinase ◽  
Fluorescence Turn On

Label-free fluorescence light-up detection of T4 polynucleotide kinase activity using the split-to-intact G-quadruplex strategy by ligation-triggered and toehold-mediated strand displacement release

The Analyst ◽  
2015 ◽  
Vol 140 (16) ◽  
pp. 5450-5453 ◽  
Author(s):  
Lu Zhou ◽  
Xiaoqiang Shen ◽  
Na Sun ◽  
Kewei Wang ◽  
Yuanyuan Zhang ◽  
...  
Keyword(s):  
Kinase Activity ◽  
Detection Method ◽  
Label Free ◽  
Strand Displacement ◽  
Polynucleotide Kinase ◽  
G Quadruplex ◽  
Fluorescence Light ◽  
T4 Polynucleotide Kinase

A label-free, fluorescence light-up detection method for T4 polynucleotide kinase activity has been developed using the split-to-intact G-quadruplex strategy.

A label-free cyclic assembly of G-quadruplex nanowires for cascade amplification detection of T4 polynucleotide kinase activity and inhibition

The Analyst ◽  
2015 ◽  
Vol 140 (17) ◽  
pp. 6124-6130 ◽  
Author(s):  
Zhilu Shi ◽  
Xiafei Zhang ◽  
Rui Cheng ◽  
Baoxin Li ◽  
Yan Jin
Keyword(s):  
Kinase Activity ◽  
Hybridization Chain Reaction ◽  
Label Free ◽  
Chain Reaction ◽  
Polynucleotide Kinase ◽  
G Quadruplex ◽  
Amplification Strategy ◽  
Cascade Amplification ◽  
T4 Polynucleotide Kinase

A label-free and enzyme-free amplification strategy has been developed for sensitively and specifically studying PNK activity and inhibitionviathe hybridization chain reaction (HCR).

Label-free fluorescence assay coupled exonuclease reaction and SYBR Green I for the detection of T4 polynucleotide kinase activity

2020 ◽  
Vol 12 (6) ◽  
pp. 807-812
Author(s):  
Xu Wu ◽  
Shuyi He ◽  
Julia Xiaojun Zhao
Keyword(s):  
Kinase Activity ◽  
Sybr Green ◽  
Fluorescence Assay ◽  
Sybr Green I ◽  
Label Free ◽  
Cleavage Reaction ◽  
Polynucleotide Kinase ◽  
T4 Polynucleotide Kinase

A sensitive label-free fluorescence assay for monitoring T4 polynucleotide kinase (T4 PNK) activity and inhibition was developed based on a coupled λ exonuclease cleavage reaction and SYBR Green I.

A Highly Sensitive and Label-Free Microbead-Based ‘Turn-On’ Colorimetric Sensor for the Detection of Mercury(II) in Urine Using a Peroxidase-Like Split G-Quadruplex–Hemin DNAzyme

2018 ◽  
Vol 71 (12) ◽  
pp. 945
Author(s):  
Xin Fu ◽  
He Zhang ◽  
Jie Zhang ◽  
Shi-Tong Wen ◽  
Xing-Cheng Deng
Keyword(s):  
Standard Deviation ◽  
Base Pair ◽  
Limit Of Detection ◽  
Label Free ◽  
Turn On ◽  
Highly Sensitive ◽  
Relative Standard ◽  
G Quadruplex ◽  
Catalytically Active ◽  
Partial Cdna

A highly sensitive and label-free microbead-based ‘turn-on’ assay was developed for the detection of Hg2+ in urine based on the Hg2+-mediated formation of intermolecular split G-quadruplex–hemin DNAzymes. In the presence of Hg2+, T–T mismatches between the two partial cDNA strands were stabilized by a T–Hg2+–T base pair, and can cause the G-rich sequences of the two oligonucleotides to associate to form a split G-quadruplex which is able to bind hemin to form the catalytically active G-quadruplex–hemin DNAzyme. This microbead-based ‘turn-on’ process allows the detection of Hg2+ in urine samples at concentrations as low as 0.5 pM. The relative standard deviation and recovery are 1.2–3.9 and 98.7–103.2%, respectively. The remarkable sensitivity for Hg2+ is mainly attributed to the enhanced mass transport ability that is inherent in homogeneous microbead-based assays. Compared with previous developments of intermolecular split G-quardruplex–hemin DNAzymes for the homogeneous detection of Hg2+ (the limit of detection was 19nM), a signal enhancement of ~1000 times is obtained when such an assay is performed on the surface of microbeads.

Parallel [TG(GA)3]n-homoduplexes/thioflavin T: an intense and stable fluorescent indicator for label-free biosensing

The Analyst ◽  
2020 ◽  
Vol 145 (1) ◽  
pp. 286-294 ◽  
Author(s):  
Qiang Liu ◽  
Shaochun Jing ◽  
Mei Liu ◽  
Yan Jin ◽  
Baoxin Li
Keyword(s):  
Thioflavin T ◽  
Label Free ◽  
Fluorescent Indicator ◽  
G Quadruplex

Compared with the G-quadruplex/ThT fluorescent system, parallel [TG(GA)3]n-dsDNA/ThT is a stable and strong fluorescent indicator for label-free biosensing.

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