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Self-assemble nanostructured ensembles for detection of guanosine triphosphate based on receptor structure modulated sensitivity and selectivity

Authors
Cao, Qian-YongHuang, Ling-XiKoo, SeyoungHe, Yue-BoJangili, ParameshKim, Jong Seung
Issue Date
1-10월-2022
Publisher
ELSEVIER SCIENCE SA
Keywords
Detection of GTP; Amphiphilic receptors; Self-assembly; Indicator displacement assay; Fluorescence sensor
Citation
SENSORS AND ACTUATORS B-CHEMICAL, v.368
Indexed
SCIE
SCOPUS
Journal Title
SENSORS AND ACTUATORS B-CHEMICAL
Volume
368
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/142861
DOI
10.1016/j.snb.2022.132091
ISSN
0925-4005
Abstract
As one vital member of the biologically important nucleotides, guanosine-5 & PRIME;-triphosphate (GTP) monitoring in biological systems has become a key research field because its abnormal concentration promotes certain pathological states. Herein, we report two "cleft-form " amphiphilic pyridinium receptors based on isophthalamide (PyPh-C16) and 2,6-dicarboxamidopyridine (PyPy-C16) spacers for structure modulated sensitive and selective response to GTP via the indicator displacement assay (IDA) method. Both receptors bind with a fluorescent indicator uranine dye (UD) to form self-assembled non-fluorescent nano-aggregate ensembles, i.e., PyPh-C16/UD and PyPy-C16/UD, which can be used for the nM detection of GTP in aqueous solution and also imaging GTP in complicated living cells environment. The non-fluorescent UD becomes fluorescent with releasing from the nano ensembles displaced by GTP. With the aid of this phenomenon, the nano-ensembles could successfully discriminate GTP from other structurally related anions, including ATP, PPi, and most nucleotide polyphosphates (NPPs). In addition, the structure-related sensing properties of receptors toward GTP were detailly discussed. Thus, we believe that the present work will allow for many important developments in the future based on IDAs with advanced nano-ensembles and different indicators to recognize various types of essential nucleoside polyphosphates.
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