化学
抗坏血酸
硫酸软骨素
降级(电信)
激进的
氢原子萃取
硫酸化
硫酸盐
氢键
色谱法
核磁共振波谱
有机化学
分子
生物化学
糖胺聚糖
食品科学
电信
计算机科学
作者
Kangyu Wang,Wenfang Wang,Ruishu Zhang,Yue Liu,Chengli Hou,Yujie Guo,Chunhui Zhang
出处
期刊:Food Chemistry
[Elsevier]
日期:2024-02-01
卷期号:434: 137392-137392
被引量:4
标识
DOI:10.1016/j.foodchem.2023.137392
摘要
Low molecular weight chondroitin sulfate (LMCS) has attention for enhanced bioavailability and bioactivity compared to native CS. We optimized H2O2/ ascorbic acid (Vc) degradation conditions to prepare LMCS from chicken, bovine, and shark cartilages. Degradation kinetics models and chemical composition data of LMCS showed the GlcA residues of chondroitin-4-sulfate (CSA) may be preferentially attacked. Nuclear magnetic resonance (NMR) spectroscopy and high-performance liquid chromatography-electrospray mass spectrometry (HPLC-MS) indicated that the CH of GlcA in CS was broken through a hydrogen abstraction reaction to break the β-(1 → 3) bond and form the hexendioic acid product. Standard density functional theory (DFT) calculations indicated that the energy required for the hydrogen abstraction from the C1-H bond in GlcA was lower than that of GalNAc. Molecular dynamics (MD) showed that CSA was more likely to interact with hydroxyl radicals (·OH) than non-sulfated chondroitin (CSO) and chondroitin-6-sulfate (CSC). These results provide guidance for producing LMCS.
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