Second Harmonic Generation Interrogation of the Endonuclease APE1 Binding Interaction with G-Quadruplex DNA.
Second Harmonic Generation Interrogation of the Endonuclease APE1 Binding Interaction with G-Quadruplex DNA.
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DOI:
10.1021/acs.analchem.2c02951
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发表时间:
2022-11-01
影响因子:
7.4
通讯作者:
Conboy, John C.
中科院分区:
文献类型:
--
作者:
Fleming, Aaron M.;Tran, Renee;Omaga, Carla A.;Manage, Shereen A. Howpay;Burrows, Cynthia J.;Conboy, John C.
The binding interaction between the DNA repair enzyme apurinic/apyrimidinic endonuclease-1 (APE1) with promoter G-quadruplex (G4) folds bearing an abasic site (AP) can serve as a gene regulatory switch during oxidative stress. Prior fluorescence-based analysis in solution suggested APE1 binds the VEGF promoter G4 but whether this interaction was specific or not remained an open question. Second harmonic generation (SHG) was used in this work to measure the non-canonical DNA-protein binding interaction in a label-free assay with high sensitivity to demonstrate the interaction is ordered and specific. The binding of APE1 to the VEGF promoter G4 with AP sites modeled by a tetrahydrofuran analog produced dissociation constants of ~100 nM that differed from duplex and single-stranded DNA control studies. The SHG measurements confirmed APE1 binds the VEGF G4 folds in a specific manner resolving a remaining question regarding how this endonuclease with gene regulatory features engages G4 folds. The studies demonstrate the power of SHG to interrogate non-canonical DNA-protein interactions providing a foundational example for the use of this analytical method in future biochemical analyses.
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DOI:
10.3390/molecules23102555
发表时间:
2018-10-07
期刊:
Molecules (Basel, Switzerland)
影响因子:
--
作者:
Hudson NO;Buck-Koehntop BA
通讯作者:
Buck-Koehntop BA
影响因子:
3.8
作者:
Burra, Silvia;Marasco, Daniela;Tell, Gianluca
通讯作者:
Tell, Gianluca
影响因子:
15
作者:
Kriech, MA;Conboy, JC
通讯作者:
Conboy, JC
影响因子:
2.9
作者:
Schermerhorn, Kelly M.;Delaney, Sarah
通讯作者:
Delaney, Sarah
DOI:
10.1021/acsbiomedchemau.1c00031
发表时间:
2021-12-15
期刊:
ACS bio & med chem Au
影响因子:
--
作者:
Fleming AM;Manage SAH;Burrows CJ
通讯作者:
Burrows CJ