...
首页> 外文期刊>Biophysical Chemistry: An International Journal Devoted to the Physical Chemistry of Biological Phenomena >NMR triple-quantum filtered relaxation analysis of 17O-water in insulin solutions: an insight into the aggregation of insulin and the properties of its bound water.
【24h】

NMR triple-quantum filtered relaxation analysis of 17O-water in insulin solutions: an insight into the aggregation of insulin and the properties of its bound water.

机译:胰岛素溶液中17 O-水的NMR三重量子过滤弛豫分析:深入了解胰岛素的聚集及其结合水的性质。

获取原文
获取原文并翻译 | 示例
           

摘要

Transverse triple-quantum filtered NMR spectroscopy (TTQF) of 17O-water was used to study the properties of water in insulin solutions at different Zn2+ concentrations and pH values. It was established that strongly bound water molecules are already present in Zn-free insulin. On the assumption that the effective correlation time of a strongly bound water molecule, tau sb, is 10 ns, the apparent number of strongly bound water molecules was approximately 3 to 4 per insulin monomer. Addition of Zn2+ equivalent to approximately 2 g-atoms per hexamer did not produce substantial increases in the overall 17O-water TTQF signal intensity and apparent fraction of bound water. The dramatic enhancement of the TTQF signals observed for samples with a Zn2+/hexamer ratio greater than approximately 2:1 could be attributed to the increase in correlation time of the strongly bound water, due to the formation of higher-order oligomers of the protein.
机译:使用17O-水的横向三重量子滤波NMR光谱(TTQF)研究了不同Zn2 +浓度和pH值的胰岛素溶液中水的性质。已经确定无锌的胰岛素中已经存在牢固结合的水分子。假设牢固结合的水分子tau sb的有效相关时间为10 ns,则每个胰岛素单体中牢固结合的水分子的表观数量约为3-4。相当于每个六聚体大约2 g原子的Zn2 +的添加不会使整体17O-水TTQF信号强度和结合水的表观分数显着增加。对于Zn2 + /六聚体比率大于约2:1的样品,观察到的TTQF信号显着增强,这可能归因于强结合水的相关时间增加,这是由于蛋白质的高阶低聚物形成所致。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号