Molecular modelling of secondary and tertiary structures of hyaluronan, compared with electron microscopy and NMR data. Possible sheets and tubular structures in aqueous solution
Molecular modelling of secondary and tertiary structures of hyaluronan, compared with electron microscopy and NMR data. Possible sheets and tubular structures in aqueous solution
复制标题
透明质酸二级和三级结构的分子建模，与电子显微镜和核磁共振数据进行比较。
DOI：
10.1007/bf00731145
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发表时间：
1994
影响因子：
3
通讯作者：
John E. Scott
中科院分区：
文献类型：
--
作者：
R. Mikelsaar;John E. Scott
电镜显示透明质酸（HA）在溶液中形成片状和管状结构。通过Tartu塑料空间填充原子模型进行的分子模拟表明，HA反平行链的羟基甲基和羧酸基可以通过氢键连接。利用这些键，透明质酸分子可以被模拟成薄片和小管。这些三级结构具有三种侧向接触方式：(1)疏水斑块堆积的反平行链；(2)由层叠相互作用和氢键连接的平行链；(3)由氢键和堆叠相互作用连接的交叉链。片状和管状结构可以解释透明质酸的一些粘弹性和生物学特性。
Electron microscopy shows that hyaluronan (HA) forms sheets and tube-like structures in solution. Molecular modelling by Tartu plastic space-filling atomic models revealed that hydroxymethyl and carboxylate groups of HA anti-parallel chains can be joined by H-bonds. Using these bonds, HA molecules can be modelled as sheets and tubules. These tertiary structures have three kinds of lateral contact: (1) antiparallel chains stacked by hydrophobic patches; (2) parallel chains joined by both stacking interactions and H-bonds; and (3) crossing chains joined by H-bonds and stacking interactions. Sheet and tubular structures may explain some viscoelastic and biological properties of HA.