Unfolding/Refolding Study on Collagen from Sea Cucumber Based on 2D Fourier Transform Infrared Spectroscopy.
Molecules
; 21(11)2016 Nov 16.
Article
em En
| MEDLINE
| ID: mdl-27854344
ABSTRACT
We aimed to explore the differences of thermal behaviors between insoluble collagen fibrils (ICFs) and pepsin-solubilized collagens (PSCs) from sea cucumber Stichopus japonicus. The unfolding/refolding sequences of secondary structures of ICFs and PSCs during the heating and cooling cycle (5 â 70 â 5 °C) were identified by Fourier transform infrared spectrometry combined with curve-fitting and 2D correlation techniques. ICFs showed a higher proportion of α-helical structures and higher thermostability than PSCs, and thus had more-stable triple helical structures. The sequences of changes affecting the secondary structures during heating were essentially the same between ICFs and PSCs. In all cases, α-helix structure was the most important conformation and it disappeared to form a ß-sheet structure. In the cooling cycle, ICFs showed a partially refolding ability, and the proportion of ß-sheet structure rose before the increasing proportion of α-helix structure. PSCs did not obviously refold during the cooling stage.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Pepinos-do-Mar
/
Colágeno
/
Espectroscopia de Infravermelho com Transformada de Fourier
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Redobramento de Proteína
/
Desdobramento de Proteína
Limite:
Animals
Idioma:
En
Revista:
Molecules
Assunto da revista:
BIOLOGIA
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
China