title: Site-specific recognition of guanosine by manganese(III) corroles in DNA non-duplex regions through active oxygen transfer.
abstract: DNA damage plays an important role in cellular processes. Besides natural protein nucleases, different types of efficient agents for DNA damage have been developed over recent decades in the search for new anticancer and antiviral drugs. In addition to the double-stranded configuration, DNA structures also include some non-duplex regions, which are considered to be from spontaneous errors in DNA replication, thus playing an important role for cells. Herein, we focused on these non-duplex regions of DNA and generated manganese(III) corroles, which exhibit a highly selective cleavage ability for guanosine units located at non-duplex portions, such as loops and bulges. The cleavage mechanism was demonstrated to be a manganese-induced oxidation process. The results given herein show a molecular approach that could specifically probe the guanosine units in DNA non-duplex structures, thus representing a promising step in the construction of tools to target non-duplex structures in chromosomes.
authors.affiliation: College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers of Ministry of Education, State Key Laboratory of Virology, Wuhan University, Hubei, Wuhan, PR China.
authors.forename: Qianqian
authors.initials: Q
authors.lastname: Zhai
authors.forename: Liang
authors.initials: L
authors.lastname: Xu
authors.forename: Yushu
authors.initials: Y
authors.lastname: Ge
authors.forename: Tian
authors.initials: T
authors.lastname: Tian
authors.forename: Wendi
authors.initials: W
authors.lastname: Wu
authors.forename: Shengyong
authors.initials: S
authors.lastname: Yan
authors.forename: Yangyang
authors.initials: Y
authors.lastname: Zhou
authors.forename: Minggang
authors.initials: M
authors.lastname: Deng
authors.forename: Yi
authors.initials: Y
authors.lastname: Liu
authors.forename: Xiang
authors.initials: X
authors.lastname: Zhou
mesh_terms: D002412:Cations / Q000737:chemistry; D004247:DNA / Q000737:chemistry*; D053837:DNA Cleavage; D006151:Guanosine / Q000737:chemistry*; D008345:Manganese / Q000737:chemistry*; D008665:Metalloporphyrins / Q000737:chemistry; D008958:Models, Molecular; D011166:Porphyrins / Q000737:chemistry*; D017382:Reactive Oxygen Species / Q000737:chemistry*
chemical_list: D002412:Cations; D008665:Metalloporphyrins; D011166:Porphyrins; D017382:Reactive Oxygen Species; C431863:corrole; D006151:Guanosine; D008345:Manganese; D004247:DNA