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The effects of HHP (high hydrostatic pressure) on the interchain interaction and the conformation of amylopectin and double-amylose molecules.

Abstract：

:Starch is an important resource in nature, and HHP (high hydrostatic pressure) is one of the most important physical modification technologies. In this study, molecular dynamics simulation was used to explore the interchain interaction and the changes of molecule conformations of amylopectin and double-amylose helix at atomic level in different pressure. The results shown that, firstly, high pressure increased the content of 4C1 chair conformation, decreased the RMSD (root mean square deviations) and RMSF (root mean square fluctuation), made molecules more stable. Secondly, high pressure increased the interchain VDW (Van der Waals) and electrostatic forces, then caused the decreases of the interchain distances and surface area of both amylopectin and double-amylose, made molecules more compact. Thirdly, high pressure decreased the intramolecular hydrogen bonds, increased the molecule-solvent hydrogen bonds. These findings can explain some existing experimental phenomena from the atomic level, meanwhile, it may also provide importance reference value for using of HHP in starch processing and the studies of starch granule structure.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Zhi-Guang C,Jun-Rong H,Hua-Yin P,Qi Y,Chen-Lu F

doi

10.1016/j.ijbiomac.2020.03.190

subject

Has Abstract

pub_date

2020-07-15 00:00:00

pages

91-102

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(20)32776-8

journal_volume

155

pub_type

杂志文章

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