Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/79475
Full metadata record
DC FieldValueLanguage
dc.contributor.authorZhang, Lihuaen
dc.contributor.authorLiu, Huaen
dc.contributor.authorShao, Yongen
dc.contributor.authorLin, Clementen
dc.contributor.authorJia, Huanen
dc.contributor.authorChen, Gangen
dc.contributor.authorYang, Danzhouen
dc.contributor.authorWang, Yingen
dc.date.accessioned2015-02-25T09:07:25Zen
dc.date.accessioned2019-12-06T13:26:15Z-
dc.date.available2015-02-25T09:07:25Zen
dc.date.available2019-12-06T13:26:15Z-
dc.date.copyright2014en
dc.date.issued2014en
dc.identifier.citationZhang, L., Liu, H., Shao, Y., Lin, C., Jia, H., Chen, G., et al. (2014). Selective lighting up of epiberberine alkaloid fluorescence by fluorophore-switching aptamer and stoichiometric targeting of human telomeric DNA G-quadruplex multimer. Analytical chemistry, 87(1), 730-737.en
dc.identifier.issn0003-2700en
dc.identifier.urihttps://hdl.handle.net/10356/79475-
dc.description.abstractAptamers, that exist naturally in living cells as functional elements and can switch nonfluorescent natural targets to fluorophores, are very useful in developing highly sensitive and selective biosensors and screening functional agents. This work demonstrates that human telomeric G-quadruplex (HTG) can serve as a potential fluorophore-switching aptamer (FSA) to target a natural isoquinoline alkaloid. We found that, among the G-quadruplexes studied here and the various structurally similar alkaloids including epiberberine (EPI), berberine (BER), palmatine (PAL), jatrorrhizine (JAT), coptisine (COP), worenine (WOR), sanguinarine (SAN), chelerythrine (CHE), and nitidine (NIT), only the HTG DNA, especially with a 5′-TA-3′ residue at the 5′ end of the G-quadruplex tetrad (5′-TAG3(TTAG3)3-3′, TA[Q]) as the minimal sequence, is the most efficient FSA to selectively light up the EPI fluorescence. Compared to the 5′ end flanking sequences, the 3′ end flanking sequences of the tetrad contribute significantly less to the recognition of EPI. The binding affinity of EPI to TA[Q] (Kd = 37 nM) is at least 20 times tighter than those of the other alkaloids. The steady-state absorption, steady-state/time-resolved fluorescence, and NMR studies demonstrate that EPI most likely interact with the 5′ end flanking sequence substructure beyond the core [Q] and the G-quadruplex tetrad in a much more specific manner than the other alkaloids. The highly selective and tight binding of EPI with the FSA and significantly enhanced fluorescence suggest the potential development of a selective EPI sensor (detection limit of 10 nM). More importantly, EPI, as the brightest FSA emitter among the alkaloids, can also serve as an efficient conformation probe for HTG DNA and discriminate the DNA G-quadruplex from the RNA counterpart. Furthermore, EPI can bind stoichiometrically to each G-quadruplex unit of long HTG DNA multimer with the most significant fluorescence enhancement, which has not been achieved by the previously reported probes. Our work suggests the potential use of EPI as a bioimaging probe and a therapeutic DNA binder.en
dc.language.isoenen
dc.relation.ispartofseriesAnalytical chemistryen
dc.rights© 2014 American Chemical Society. This is the author created version of a work that has been peer reviewed and accepted for publication by Analytical Chemistry, American Chemical Society. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1021/ac503730j].en
dc.subjectDRNTU::Science::Chemistry::Biochemistryen
dc.titleSelective lighting up of epiberberine alkaloid fluorescence by fluorophore-switching aptamer and stoichiometric targeting of human telomeric DNA G-quadruplex multimeren
dc.typeJournal Articleen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen
dc.identifier.doi10.1021/ac503730jen
dc.description.versionAccepted versionen
item.grantfulltextopen-
item.fulltextWith Fulltext-
Appears in Collections:SPMS Journal Articles

SCOPUSTM   
Citations 10

52
Updated on Jul 17, 2024

Web of ScienceTM
Citations 10

45
Updated on Oct 29, 2023

Page view(s) 50

604
Updated on Jul 22, 2024

Download(s) 20

339
Updated on Jul 22, 2024

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.