title: Pyrene-assisted efficient photolysis of disulfide bonds in DNA-based molecular engineering.
abstract: An efficient pyrene-assisted method has been developed for the photolysis of disulfide bonds, with 77% of disulfides cleaved after only 20 min of irradiation (0.3W) at 350 nm. By employing a DNA framework, it was possible to observe both a distance-dependent cleavage pathway and a radical-forming photoreaction mechanism. To demonstrate the biomedical applications of such pyrene disulfide molecular assemblies, a DNA micelle structure and DNAzyme analog were further studied. Rapid photodriven disassembly of DNA micelles was achieved, allowing the further design of controlled pharmaceutical release at the target region and at a specific time. The DNAzyme analog can carry out multiple turnover reactions that follow the Michaelis-Menten equation, with a kcat of 10.2 min(-1) and a KM of 46.3 μM (0.3W 350 nm light source), comparable to that of common DNAzymes, e.g., 8-17 DNAzyme.
authors.affiliation: Department of Chemistry, Center for Research at the Bio/Nano Interface, UF Genetics Institute, University of Florida, Gainesville, Florida 32611-7200, United States.
authors.forename: Mingxu
authors.initials: M
authors.lastname: You
authors.forename: Zhi
authors.initials: Z
authors.lastname: Zhu
authors.forename: Haipeng
authors.initials: H
authors.lastname: Liu
authors.forename: Basri
authors.initials: B
authors.lastname: Gulbakan
authors.forename: Da
authors.initials: D
authors.lastname: Han
authors.forename: Ruowen
authors.initials: R
authors.lastname: Wang
authors.forename: Kathryn R
authors.initials: KR
authors.lastname: Williams
authors.forename: Weihong
authors.initials: W
authors.lastname: Tan
mesh_terms: D001665:Binding Sites; D002616:Chemical Engineering / Q000379:methods*; D004247:DNA / Q000737:chemistry* / Q000528:radiation effects; D021881:DNA, Catalytic / Q000737:chemistry* / Q000528:radiation effects; D004220:Disulfides / Q000737:chemistry* / Q000528:radiation effects; D010782:Photolysis; D011721:Pyrenes / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D021881:DNA, Catalytic; D004220:Disulfides; D011721:Pyrenes; D004247:DNA