高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (06): 1151.doi: 10.3969/j.issn.0251-0790.2012.06.006

• 研究论文: 无机化学 • 上一篇    下一篇

多苯并咪唑锰( Ⅱ )配合物的合成及对DNA凝聚的促进作用

黄雪英, 孟祥高, 张妍, 王莉, 刘长林   

  1. 华中师范大学农药与化学生物学教育部重点实验室, 化学学院, 武汉 430079
  • 收稿日期:2011-09-05 出版日期:2012-06-10 发布日期:2012-06-10
  • 通讯作者: 王 莉, 女, 博士, 讲师, 主要从事蛋白质聚集调控及功能配合物研究. E-mail: wl_928@mail.ccnu.edu.cn E-mail:hxy@mail.ccnu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20971049, 21001047)和华中师范大学博士基金(批准号: CCNU10A01010)资助.

Synthesis and Properties on Promoting DNA Condensation of Polybenzimidazole Mn(Ⅱ) Complexes

HUANG Xue-Ying, MENG Xiang-Gao, ZHANG Yan, WANG Li, LIU Chang-Lin   

  1. Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, China
  • Received:2011-09-05 Online:2012-06-10 Published:2012-06-10

摘要: 以多苯并咪唑配体1,1,4,7,7-五(2-苯并咪唑甲基)-二乙基三胺(DTPB)为主配体, 合成了锰(Ⅱ)配合物[Mn(DTPB)Ac]Ac·8H2O(1)和[Mn2(DTPB)(NO3)2(H2O)2][Mn2(DTPB)(NO3)2(H2O)(CH3OH)]·(NO3)4·5CH3OH·H2O(2), 并对其进行了表征. 利用紫外-可见吸收光谱和黏度实验研究了配合物1和2与DNA的相互作用, 发现这2个配合物均能与DNA结合, 并对配合物与DNA作用的机理进行了探讨. 利用琼脂糖凝胶电泳和直角光散射(RALS)技术研究了配合物1和2促进DNA凝聚的性质. 结果表明, 在近中性条件下2个配合物都能促使DNA凝聚. 利用透射电子显微镜(TEM)观察了不同凝聚体的形态.

关键词: 1,1,4,7,7-五(2-苯并咪唑甲基)-二乙基三胺, 锰(Ⅱ)配合物, 晶体结构, DNA凝聚

Abstract: Complexes [Mn(DTPB)Ac]Ac·8H2O(1) and [Mn2(DTPB)(NO3)2(H2O)2][Mn2(DTPB)·(NO3)2·(H2O)·(CH3OH)](NO3)4·5CH3OH·H2O(2) were synthesized via 1,1,4,7,7-pentakis(1H-benzimidazol-2-ylmethyl)-1,4,7-triazaheptane(DTPB) as the main ligand and characterized by X-ray diffraction. The interaction between complexes 1 or 2 and DNA, examined by UV-Vis absorption spectra and viscosity experiments, indicated that the two Mn(Ⅱ) complexes have strong affinity for DNA. The interaction mechanism of the complexes with DNA was discussed. These Mn(Ⅱ) complexes can promote DNA condensation under neutral conditions, as illustrated by gelose gel electrophoresis and right angle light scattering(RALS). The morphologies of the DNA condensates were observed by transmission electron microscopy(TEM).

Key words: 1,1,4,7,7-Pentakis(1H-benzimidazol-2-ylmethyl)-1,4,7-triazaheptane(DTPB), Mn(Ⅱ) complex, Crystal structure, DNA condensation

中图分类号: 

TrendMD: