In Vitro Selection of Chromium-Dependent DNAzymes for Sensing Chromium(III) and Chromium(VI)

Simple item page
dc.contributor.authorZhou, Wenhu
dc.contributor.authorVazin, Mahsa
dc.contributor.authorYu, Tianmeng
dc.contributor.authorDing, Jinsong
dc.contributor.authorLiu, Juewen
dc.date.accessioned2017-04-28T16:11:54Z
dc.date.available2017-04-28T16:11:54Z
dc.date.issued2016-07-04
dc.descriptionThis is the peer reviewed version of the following article: Zhou, W., Vazin, M., Yu, T., Ding, J., & Liu, J. (2016). In Vitro Selection of Chromium-Dependent DNAzymes for Sensing Chromium(III) and Chromium(VI). Chemistry-a European Journal, 22(28), 9835–9840, which has been published in final form at https://doi.org/10.1002/chem.201601426. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.en
dc.description.abstractChromium is a very important analyte for environmental monitoring, and developing biosensors for chromium is a long-standing analytical challenge. In this work, in vitro selection of RNA-cleaving DNAzymes was carried out in the presence of Cr3+. The most active DNAzyme turned out to be the previously reported lanthanide-dependent Ce13d DNAzyme. Although the Ce13d activity was about 150-fold lower with Cr3+ than that with lanthanides, the activity of lanthanides and other competing metals was masked by using a phosphate buffer; this left Cr3+ as the only metal that could activate Ce13d. With 100 mu mm Cr3+, the cleavage rate is 1.6 h(-1) at pH 6. By using a molecular beacon design, Cr3+ was measured with a detection limit of 70 nm, which was significantly lower than the United States Environmental Protection Agency (EPA) limit (11 mu m). Cr4+ was measured after reduction by NaBH4 to Cr3+, and it could be sensed with a similar detection limit of 140 nm Cr4+; this value was lower than the EPA limit of 300 nm. This sensor was tested for chromium speciation analysis in a real sample, and the results supported its application for environmental monitoring. At the same time, it has enhanced our understanding of the interactions between chromium and DNA.en
dc.description.sponsorshipUniversity of Waterloo; Natural Sciences and Engineering Research Council of Canada (NSERC); Foundation for Shenghua Scholar of Central South University; National Natural Science Foundation of China [21301195]; China Scholarship Council (CSC) [201406370116]en
dc.identifier.urihttp://dx.doi.org/10.1002/chem.201601426
dc.identifier.urihttp://hdl.handle.net/10012/11782
dc.language.isoenen
dc.publisherWileyen
dc.subjectRna-Cleaving DNAzymeen
dc.subjectElectrochemical Detectionen
dc.subjectMetal-Ionsen
dc.subjectDNAen
dc.subjectSpeciationen
dc.subjectSensoren
dc.subjectBiosensoren
dc.subjectCleavageen
dc.subjectWateren
dc.subjectPreconcentrationen
dc.titleIn Vitro Selection of Chromium-Dependent DNAzymes for Sensing Chromium(III) and Chromium(VI)en
dc.typeArticleen
dcterms.bibliographicCitationZhou, W., Vazin, M., Yu, T., Ding, J., & Liu, J. (2016). In Vitro Selection of Chromium-Dependent DNAzymes for Sensing Chromium(III) and Chromium(VI). Chemistry-a European Journal, 22(28), 9835–9840. https://doi.org/10.1002/chem.201601426en
uws.contributor.affiliation1Faculty of Scienceen
uws.contributor.affiliation2Chemistryen
uws.contributor.affiliation3Waterloo Institute for Nanotechnology (WIN)en
uws.peerReviewStatusRevieweden
uws.scholarLevelFacultyen
uws.typeOfResourceTexten

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
In Vitro Selection of Chromium-Dependent DNAzymes for Sensing Cr(III) and Cr(VI)-s.pdf
Size:
572.82 KB
Format:
Adobe Portable Document Format
Description:
Post-print
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
4.46 KB
Format:
Plain Text
Description:
Download

Collections

Waterloo Research
Chemistry
Waterloo Institute for Nanotechnology