Citation: Chen Jialin, Sun Fude, Chen Peng, Chai Mengya, Xu Lida, Luo Shi-Zhong. A study of the lipid-mediated dimerization of the RAGE TM+JM domains by molecular dynamic simulations[J]. Chinese Chemical Letters, ;2018, 29(7): 1151-1154. doi: 10.1016/j.cclet.2018.04.005 shu

A study of the lipid-mediated dimerization of the RAGE TM+JM domains by molecular dynamic simulations

Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China

Corresponding author: Xu Lida, xuld@mail.buct.edu.cn Luo Shi-Zhong, luosz@mail.buct.edu.cn

Received Date: 30 January 2018
Revised Date: 22 February 2018
Accepted Date: 2 April 2018
Available Online: 5 July 2018

Figures(3)

Receptor for Advanced Glycation End-products (RAGE) binds to a number of ligand families to display important roles in hyperglycemia, senescence, inflammation, neurodegeneration and cancer. It is reported that RAGE regulates the related biological processes via homo-dimerization by the transmembrane (TM) domain, and evidence further shows that the intracellular domain of RAGE has an influence on the dimerization activity of RAGE. In this study, we explored the underlying interaction mechanism of RAGE TM domains by multiscale coarse-grained (CG) dynamic simulations. Two switching packing modes of the TM dimeric conformations were observed. Through a series of site-directed mutations, we further emphasized the key roles of the A³⁴²xxxG³⁴⁶xxG³⁴⁹xxxT³⁵³xxL³⁵⁶xxxV³⁶⁰ motif in the left-handed configuration and the L³⁴⁵xxxG³⁴⁹xxG³⁵²xxxL³⁵⁶ motif in the right-handed configuration. In addition, we revealed that the juxtamembrane (JM) domain within JM-A375 can determine the RAGE TM dimeric structure. Overall, we provide the molecular insights into the switching dimerization of RAGE TM domains, as well as the regulation from the JM domains mediated by the anionic lipids.
- RAGE,
- Dimerization,
- TM+JM domains,
- Lipid Regulation,
- Coarse-grained simulations
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沈阳化工大学材料科学与工程学院沈阳 110142