中国物理B ›› 2019, Vol. 28 ›› Issue (7): 78701-078701.doi: 10.1088/1674-1056/28/7/078701

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Effects of Mg2+ on the binding of the CREB/CRE complex: Full-atom molecular dynamics simulations

Song Mao(毛松), Shuai Wang(王帅), Haiyou Deng(邓海游), Ming Yi(易鸣)   

  1. Department of Physics, Huazhong Agriculture University, Wuhan 430070, China
  • 收稿日期:2019-03-27 修回日期:2019-04-09 出版日期:2019-07-05 发布日期:2019-07-05
  • 通讯作者: Haiyou Deng, Ming Yi E-mail:hydeng@mail.hzau.edu.cn;yiming@mail.hzau.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11705064, 11675060, and 91730301), the Fundamental Research Funds for the Central Universities, China (Grant Nos. 2662016QD005 and 26622018JC017), and the Huazhong Agricultural University Scientific and Technological Self-Innovation Foundation Program, China (Grant No. 2015RC021).

Effects of Mg2+ on the binding of the CREB/CRE complex: Full-atom molecular dynamics simulations

Song Mao(毛松), Shuai Wang(王帅), Haiyou Deng(邓海游), Ming Yi(易鸣)   

  1. Department of Physics, Huazhong Agriculture University, Wuhan 430070, China
  • Received:2019-03-27 Revised:2019-04-09 Online:2019-07-05 Published:2019-07-05
  • Contact: Haiyou Deng, Ming Yi E-mail:hydeng@mail.hzau.edu.cn;yiming@mail.hzau.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11705064, 11675060, and 91730301), the Fundamental Research Funds for the Central Universities, China (Grant Nos. 2662016QD005 and 26622018JC017), and the Huazhong Agricultural University Scientific and Technological Self-Innovation Foundation Program, China (Grant No. 2015RC021).

摘要:

Metal ions play critical roles in the interaction between deoxyribonucleic acid (DNA) and protein. The experimental research has demonstrated that the Mg2+ ion can affect the binding between transcription factor and DNA. In our work, by full-atom molecular dynamic simulation, the effects of the Mg2+ ion on the cyclic adenosine monophosphate (cAMP) response element binding protein (CREB)/cAMP response elements (CRE) complex are investigated. It is illustrated that the number of hydrogen bonds formed at the interface between protein and DNA is significantly increased when the Mg2+ ion is added. Hence, an obvious change in the structure of the DNA is observed. Then the DNA base groove and base pair parameters are analyzed. We find that, due to the introduction of the Mg2+ ion, the DNA base major groove becomes narrower. A potential mechanism for this observation is proposed. It is confirmed that the Mg2+ ion can enhance the stability of the DNA-protein complex.

关键词: cAMP response element binding protein (CREB), molecular dynamics (MD) simulation, hydrogen bond, Mg2+ ion

Abstract:

Metal ions play critical roles in the interaction between deoxyribonucleic acid (DNA) and protein. The experimental research has demonstrated that the Mg2+ ion can affect the binding between transcription factor and DNA. In our work, by full-atom molecular dynamic simulation, the effects of the Mg2+ ion on the cyclic adenosine monophosphate (cAMP) response element binding protein (CREB)/cAMP response elements (CRE) complex are investigated. It is illustrated that the number of hydrogen bonds formed at the interface between protein and DNA is significantly increased when the Mg2+ ion is added. Hence, an obvious change in the structure of the DNA is observed. Then the DNA base groove and base pair parameters are analyzed. We find that, due to the introduction of the Mg2+ ion, the DNA base major groove becomes narrower. A potential mechanism for this observation is proposed. It is confirmed that the Mg2+ ion can enhance the stability of the DNA-protein complex.

Key words: cAMP response element binding protein (CREB), molecular dynamics (MD) simulation, hydrogen bond, Mg2+ ion

中图分类号:  (Biomolecules: types)

  • 87.14.-g
87.15.ap (Molecular dynamics simulation) 87.15.kj (Protein-polynucleotide interactions)