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DNA/RNA G-quadruplex

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Chemical Biology".

Deadline for manuscript submissions: closed (30 September 2020) | Viewed by 2825

Special Issue Editor


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Guest Editor
Division of Chemistry, Department of Medical Sciences, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan
Interests: biochemistry; bioorganic chemistry; bio-orthogonal chemistry; DNA; RNA; telomere; G-quadruplex
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Special Issue Information

Dear Colleagues,

DNA/RNA G-quadruplexes are formed by the stacking of several G-tetrads and are constituted by four backbone strands connected by several loops. In recent years, these noncanonical structures have been suggested to be involved in various genome dynamics, such as transcription, replication, translation, recombination, higher-order chromosome structure, telomere regulation, epigenome regulation, etc. The related proteins of DNA/RNA G-quadruplexes are involved in important biological functions. Many G-quadruplexes are considered to be attractive molecular targets for cancer therapeutics. Recently, some small molecules and antibodies have been used to investigate G-quadruplex structures. Furthermore, G-quadruplexes are finding applications in nanotechnology as nanomaterials, mechanical devices, and biosensors. This Special Issue aims to provide an overview of the advances in understanding of the structures and functions of DNA/RNA G-quadruplexes, and the current efforts on developing various chemical probes, nanomaterials, and biosensors in G-quadruplexes.

Prof. Yan Xu
Guest Editor

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Keywords

  • DNA/RNA G-quadruplex structures
  • DNA/RNA G-quadruplex functions
  • chemical probes for DNA/RNA G-quadruplexes
  • related proteins of DNA/RNA G-quadruplexes
  • nanotechnology and nanomaterials in G-quadruplexes

Published Papers (1 paper)

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Research

9 pages, 1650 KiB  
Communication
Effect of Distance from Catalytic Synergy Group to Iron Porphyrin Center on Activity of G-Quadruplex/Hemin DNAzyme
by Dehui Qiu, Jingang Mo, Yuan Liu, Jiangyan Zhang, Yongqiang Cheng and Xiaobo Zhang
Molecules 2020, 25(15), 3425; https://doi.org/10.3390/molecules25153425 - 28 Jul 2020
Cited by 6 | Viewed by 2325
Abstract
G-quadruplex/Hemin (G4/Hemin) complex has been widely used in biocatalysis and analytical applications. Meanwhile, compared with natural proteinous enzyme, its low catalytic activity is still limiting its applications. Even though several methods have been developed to enhance the peroxidation efficiency, the important core of [...] Read more.
G-quadruplex/Hemin (G4/Hemin) complex has been widely used in biocatalysis and analytical applications. Meanwhile, compared with natural proteinous enzyme, its low catalytic activity is still limiting its applications. Even though several methods have been developed to enhance the peroxidation efficiency, the important core of the G4 design based enhancement mechanism is still indistinct. Here, we focus the mechanism study on the two most important microdomains: the iron porphyrin center and the catalytic synergy group within the 3′ flanking. These microdomains not only provide the pocket for the combination of substrate, but also offer the axial coordination for the accelerated formation of Compound I (catalytic intermediate). In order to obtain a more suitable space layout to further accelerate the catalytic process, we have used the bases within the 3′ flanking to precisely regulate the distance between microdomains. Finally, the position-dependent effect on catalytic enhancement is observed. When dC is positioned at the second-position of 3′ flanking, the newly obtained DNAzyme achieves an order of magnitude improvement compared to parent G4/Hemin in catalytic activity. The results highlight the influence of the distance between the catalytic synergy group and iron porphyrin center on the activity of DNAzyme, and provide insightful information for the design of highly active DNAzymes. Full article
(This article belongs to the Special Issue DNA/RNA G-quadruplex)
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