Study on spectroscopic characterization of Cu porphyrin/Co porphyrin and their interactions with ctDNA.
The luminescence behaviors of Cu(II) meso-tetrakis (4-N-methyl-pyridiniumyl) porphyrin (Cu(II)TMPyP) and Co(II) meso-tetrakis (4-N-methyl-pyridiniumyl) porphyrin (Co(II)TMPyP) are investigated, and their interactions with calf thymus DNA (ctDNA) are studied by UV-vis, fluorescence and resonance light scattering (RLS) and based on the changes of UV-vis spectra, fluorescence and RLS spectra, the intrinsic binding constants of Cu(II)TMPyP/Co(II)TMPyP with ctDNA are obtained in the case of phosphate buffer solution (pH 7.2), respectively. According to the experimental results, it can be inferred that the interaction model of Cu(II)TMPyP with ctDNA is intercalative binding, while Co(II)TMPyP is the long-range assembly on the molecular surface of ctDNA.
Li
Jun
J
Research Center of Environmental Science and Engineering, Institute of Molecular Science, Shanxi University, Taiyuan, Shanxi 030006, China.
Wei
Yanli
Y
Guo
Limin
L
Zhang
Caihong
C
Jiao
Yong
Y
Shuang
Shaomin
S
Dong
Chuan
C
D000818:Animals; D002417:Cattle; D004247:DNA / Q000737:chemistry*; D008665:Metalloporphyrins / Q000138:chemical synthesis / Q000737:chemistry*; D008958:Models, Molecular; D009690:Nucleic Acid Conformation; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013057:Spectrum Analysis / Q000379:methods*; D013499:Surface Properties
D008665:Metalloporphyrins; C512795:cobalt(III)meso-tetrakis(N-methylpyridinium-4-yl)porphyrin; C441603:meso-tetra(4-methylpyridinium)porphyrinato copper(II); D004247:DNA; C427203:calf thymus DNA