论文部分内容阅读
In this study,we have demonstrated the conformational changes to DNA induced by abnormal interactions of copper using circular dichroism,in combination with UV-absorbance and fuorescence spectroscopy.Results confrm that binding of copper to bases of DNA in chromatin is concentration dependent.Binding effciency of Cu2+ions to DNA is increased in proportion to the degree of unwinding of the double helix induced by denaturation.Altered B-DNA conformation will alter the integrity of DNA which may affect the normal process of DNA replication and transcription.Copper induced DNA damage in the brain may cause neurotoxicity and the neuronal cell death and is implicated in Alzheimer’s disease and other neurological disorders.
In this study, we have demonstrated the conformational changes to DNA induced by abnormal interactions of copper using circular dichroism, in combination with UV-absorbance and fuorescence spectroscopy. Results confrm that binding of copper to bases of DNA in chromatin is concentration dependent. Binding effciency of Cu2 + ions to DNA is increased in proportion to the degree of unwinding of the double helix induced by denaturation. Altered B-DNA conformation will alter the integrity of DNA which may affect the normal process of DNA replication and transcription. Copper induced DNA damage in the brain may cause neurotoxicity and the neuronal cell death and is implicated in Alzheimer’s disease and other neurological disorders.