Chinese Journal of Applied Chemistry ›› 2021, Vol. 38 ›› Issue (12): 1612-1620.DOI: 10.19894/j.issn.1000-0518.210018

• Full Papers • Previous Articles     Next Articles

Mechanism of Enhancing Antifreeze Protein Activity by Low Molecular Mass Molecules

DING Ya-Li1, HU Xiang-Xiang1, FENG Xuan2,3, ZHANG Ran2*, SHI Tong-Fei2,3*, WEI Lai1   

  1. 1(Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matter Physics, College of Physical Science and Technology, Yili Normal University, Yining 835000, China)
    2(State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China)
    3(School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China)
  • Received:2021-01-10 Revised:2021-03-26 Published:2021-12-01 Online:2022-02-01
  • Supported by:
    National Natural Science Foundation of China(No.21604086)

Abstract: Antifreeze proteins (AFPs) are able to generate a difference between the non-equilibrium freezing point and the melting point, which is called thermal hysteresis (TH). AFPs inspire the design of new materials for use in the field of food industry and biomedical applications such as cell and organ preservation. The TH activity of a specific AFP of a beetle named Dendroides canadensis (DAFP-1) can be enhanced by low molecular mass molecules such as glycerol, trehalose and citrate acid, however the mechanism remains elusive. In order to reveal the molecular mechanism of the corresponding enhancing effects, we use AutoDock4.2 software to explore the potential docking modes between DAFP-1 and these low molecular mass molecules. Through the comparison and analysis of binding energy and docking conformations, it is found that the physical mechanism of low molecular mass molecules promoting antifreeze activity is not only limited to the single site binding between Arg9 residues and low molecular mass molecules as predicted in literature, the enhancement can also happen through the combined docking sites such as Arg30 and Arg54. These new binding scenarios can promote the aggregation of multiple DAFP-1 proteins forming larger binding templates, which greatly improves the antifreeze activity of DAFP-1.

Key words: Antifreeze proteins, Arginine, Low molecular mass molecules, AutoDock

CLC Number: