Abstract：
:Ultra-high pressure technology has attracted a great deal of attention in recent years, and has been widely used in food science, medicine, and other fields. This study aimed to determine the effect of ultra-high pressure on the structure and properties of collagen. Native collagen extracted from bullfrog skin was processed under different ultra-high pressure treatment conditions (300, 400, and 500MPa). Then systematic analysis of the molecular structures and properties of the samples after ultra-high pressure treatment were performed. It was found that the conformation of collagen molecules could be adjusted by ultra-high pressure treatment, and this regulation was closely related to the level of treatment pressure. A possible mechanism of the impact of ultra-high pressure on the collagen molecular structures was speculated according to the experimental results. At low pressure levels (300-400MPa), the pressure perpendicular to collagen axis dominates and leads to a tightening of the triple helix structure of collagen, while the pressure parallel to collagen axis is dominant and the triple helix tends to dissociate like a zipper at high pressure levels (>400MPa). These structural changes would simultaneously result in various changes to thermal stability, self-assembly properties, and antigenicity of collagen.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Nan J,Zou M,Wang H,Xu C,Zhang J,Wei B,He L,Xu Ydoi
10.1016/j.ijbiomac.2017.12.163subject
Has Abstractpub_date
2018-05-01 00:00:00pages
200-207eissn
0141-8130issn
1879-0003pii
S0141-8130(17)32769-1journal_volume
111pub_type
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