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DNA와 상호작용에서 T4 endonuclease V의 C-말단 부위의 역할에 관한 분광학적 연구: 핵자기공명과 형광 실험
유준석(Jun Seok Yu),임형미(Hyung Mi Lihm),임후강(Hu Kang Ihm),신정휴(Jung Hyu Shin),이봉진(Bong Jin Lee) 대한약학회 1996 약학회지 Vol.40 No.2
In order to study the role of C-terminal aromatic region of T4 endonuclease V in the interaction with substrate DNA, NMR and Fluorescence spectrum were recorded. Analysis of fluorescence emission spectra showed that C-terminal region of T4 endonuclease V is in or very near the binding site. In the HSQC spectrum of 15N-Tyr-labeled T4 endonuclease V*DNA complex, the broadening of a peak was observed. It is presumed that this peak corresponds to one among three tyrosine residues which belong to the WYKYY segment of C-terminal region of T4 endonuclease V. Interactions of peptide fragments consisting of C-terminal residues of T4 endonuclease V with DNAs(TT-, T^T-DNA) were investigated by NMR and Fluorescence experiment. The results suggest that two peptide fragments themselves bind to DNAs and their binding pattern is not an intercalation mode.