Bis-intercalation of a cationic porphyrin dimer linked with trietylene glycol derivative to DNA from the major groove

Title
Bis-intercalation of a cationic porphyrin dimer linked with trietylene glycol derivative to DNA from the major groove
Author(s)
김석규이창윤공린단손영구이영선[이영선]이석중[이석중]한성욱[한성욱]
Keywords
LINEAR DICHROISM; BINDING MODE; MINOR-GROOVE; ZINC(II) COMPLEXES; SELECTIVE BINDING; NUCLEIC-ACIDS; DUPLEX DNA; MESO-TETRAKIS(N-METHYLPYRIDINIUM-4-YL)PORPHYRIN; SPECTROSCOPY; STACKING
Issue Date
201210
Publisher
WORLD SCI PUBL CO INC
Citation
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES, v.16, no.11, pp.1159 - 1166
Abstract
The binding mode of a porphyrin dimer to double stranded native DNA was investigated in this study using normal electric absorption, circular dichroism (CD) and linear dichroism (LD) spectroscopies. At the time of mixing, the spectral properties of the porphyrin dimer upon its association with DNA were characterized by hypochromism and a red shift in the absorption spectrum and by complicated CD and negative LD in the Soret region. As time elapsed, the CD spectrum became a negative single band and the negative LD signal increased. These spectral changes suggested that the majority of both porphyrin moieties of the dimer intercalated between the DNA base-pairs. The changes in the spectral characteristics of the DNA bound porphyrin-dimer were similar when the minor groove of DNA was saturated by 4',6-diamidino-2-phenylindole (DAPI), which is well-known minor groove binding molecule. The spectral properties of DAPI, which can be summarized by a large positive induced CD in the DAPI absorption region (300 similar to 400 nm) and wavelength-independent positive reduced LD, remained intact when the porphyrin dimer was present. These observations indicated that both DAPI and porphyrin bind to DNA simultaneously, and furthermore, the bis-intercalation of the porphyrin dimer occurs in the major groove.
URI
http://hdl.handle.net/YU.REPOSITORY/27162http://dx.doi.org/10.1142/S1088424612501283
ISSN
1088-4246
Appears in Collections:
이과대학 > 화학생화학부 > Articles
문과대학 > 중국언어문화학과 > Articles
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