Substitution of Cytosine with Guanylurea Decreases the Stability of i-Motif DNA

Wright, Elisé P., Lamparska, Katarzyna, Smith, Steven S. and Waller, Zoë A. E. (2017) Substitution of Cytosine with Guanylurea Decreases the Stability of i-Motif DNA. Biochemistry, 56 (36). pp. 4879-4883. ISSN 0006-2960

[thumbnail of Published manuscript]
PDF (Published manuscript) - Published Version
Available under License Creative Commons Attribution.

Download (1MB) | Preview


Both 5-aza-2′-deoxycytidine (decitabine) and its primary breakdown product, 2′-deoxyriboguanylurea (GuaUre-dR), have been shown to act as mutagens and epimutagens that cause replication stress and alter both DNA methylation and gene expression patterns. As cytosine analogues, both are expected to be preferentially incorporated into regions of GC skew where runs of cytosine residues are sequestered on one strand and guanine residues on the other. Given that such regions have been identified as sites with the potential for effects on gene expression and replication stress linked to formation of alternative DNA secondary structures, it is of interest to determine the influence that these base analogues might have on the stability of structures of this kind. Here we report that incorporation of GuaUre-dR into an i-motif-forming sequence decreases both the thermal and pH stability of an i-motif despite the apparent ability of GuaUre-dR to base pair with cytosine.

Item Type: Article
Faculty \ School: Faculty of Science > School of Pharmacy
UEA Research Groups: Faculty of Science > Research Groups > Chemical Biology and Medicinal Chemistry (former - to 2021)
Related URLs:
Depositing User: Pure Connector
Date Deposited: 10 Oct 2017 00:30
Last Modified: 28 Jul 2023 02:55
DOI: 10.1021/acs.biochem.7b00628


Downloads per month over past year

Actions (login required)

View Item View Item