title: Synthesis, crystal structure, and DNA-cleaving behavior of 5-substituted benzene-1,3-bis(methylene)-spaced dinuclear copper(II) complexes.
abstract: Three meta-dicopper complexes, 1-3, based on 5-substituted 1,3-xylylene spacer have been synthesized. These complexes are capable of inducing the transformation of supercoiled DNA (pUC19) to its nicked and linear DNA form in the presence of ascorbate, and their DNA nicking efficiency can be correlated to their DNA-binding ability. The cleavage mechanism is similar to that of the non-substituted meta-dicopper complex A. Amongst the three complexes, 5-(aminomethyl)-substituted complex 3 displayed a higher DNA-binding ability and nicking efficiency than unsubstituted complex A. The CD-spectroscopic study and structural analysis imply that the different CuCu distances and DNA binding modes induced by different 5-substituents on benzene-1,3-bis(methylene) spacer may be responsible for the different DNA cleaving behavior of meta-dicopper complexes.
authors: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China, (phone: +86-25-83594549; fax: +86-25-83314502).
authors: Tuanjie
authors: T
authors: Li
authors: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China, (phone: +86-25-83594549; fax: +86-25-83314502).
authors: Jun
authors: J
authors: Du
authors: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China, (phone: +86-25-83594549; fax: +86-25-83314502).
authors: Tao
authors: T
authors: Li
authors: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China, (phone: +86-25-83594549; fax: +86-25-83314502).
authors: Ziyi
authors: Z
authors: Wu
authors: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China, (phone: +86-25-83594549; fax: +86-25-83314502).
authors: Weijiang
authors: W
authors: He
authors: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China, (phone: +86-25-83594549; fax: +86-25-83314502).
authors: Jianhui
authors: J
authors: Zhu
authors: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China, (phone: +86-25-83594549; fax: +86-25-83314502).
authors: Zijian
authors: Z
authors: Guo
mesh_terms: D001665:Binding Sites; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004247:DNA / Q000737:chemistry*; D053837:DNA Cleavage; D008024:Ligands; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D013237:Stereoisomerism; D013329:Structure-Activity Relationship; D014992:Xylenes
chemical_list: D008024:Ligands; D009942:Organometallic Compounds; D014992:Xylenes; D003300:Copper; D004247:DNA